Journal of Petrochemical Universities

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Effect of A⁃Site Defect on Sulfur Poisoning Behaivor of Ferrite⁃Based Cathode Materials

Quansen Yang, Fangfang Wang

Abstract （4397）

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Ppb amount of SO₂ in air will react with cathode material of solid oxide fuel cell, inducing decrease of the cell/stack performance as one of the most effective factors.The sulfur poisoning behavior of (La_0.6Sr_0.4) (Co_0.2Fe_0.8)O₃(LSCF) and A?site deficient (La_0.6Sr_0.4)_0.85(Co_0.2Fe_0.8)O₃(LSCF85) was investigated after exposure to 30 μg/g SO₂ at 800 ℃ for 50 h.The products of the reaction were characterized by XRD,SEM and EDX to evaluate the effect of A?site defects on the sulfur poisoning behavior of perovskite ferrite based solid oxide fuel cell cathode materials. It was found that A?site defect in LSCF85 can suppress the chemical reaction between LSCF based cathode and SO₂. It was ascribed to the low Sr reaction activity with SO₂ caused by the existence of A?site defect.

2021, 34 (6): 1-6. DOI: 10.3969/j.issn.1006-396X.2021.06.001

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Progress in Hydrogen Production by Water Electrolysis and Its Electrocatalysts

Yujing Zhang, Baoshan Zhang, Jie Sun

Abstract （4084）

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As the society and economy move forward, energy and environmental problems have attracted extensive attention. Hydrogen energy is considered the ideal clean energy in the 21st century due to its high energy density, pollution?free attribute, abundant reserves, and wide application. As a clean production technology, hydrogen production by water electrolysis has developed vigorously under the goals of carbon peak and carbon neutrality. The key challenge lies in the development of high?performance electrocatalysts for the hydrogen evolution reaction (HER) to reduce the overpotential of water splitting. This paper reviewed the current mainstream hydrogen production technologies by water electrolysis in detail and analyzed the characteristics and advantages and disadvantages of each technology. Moreover,it summarized the research progress of HER catalysts and predicted the development directions of the hydrogen production technology by water electrolysis and its electrocatalysts.

2022, 35 (6): 19-27. DOI: 10.3969/j.issn.1006-396X.2022.06.003

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Synthesis of Acetal With Solid Super Acid Catalyst S₂O^2-₈/ZrO₂

WANG Jun-li,MENG Shuang-ming,LI Zhong,et al

Abstract （2968）

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The S ₂O ^2- ₈/ZrO ₂  solid acid catalyst was prepared from ZrOCl ₂and (NH ₄) ₂S ₂O ₈ by precipitation, aging, filtering, washing, drying, impregnation and calcination processes. The characterization of the catalyst was performed using XRD, FT-IR and NH ₃-TPD. The effect of calcination temperature on the acidic property, textural property and catalytic perfomance of S ₂O ^2- ₈/ZrO ₂ solid acid catalysts was studied. XRD patterns show that the catalyst present is higher tetragonal phase. FT-IR spectra shows that S ₂O ^2- ₈ is strongly bind with the ZrO ₂surface bidentately. With S ₂O ^2- ₈/ZrO ₂ as catalyst,the effects of molar ratio of glycol to aldehyde, quantity of catalyst, reaction time on the yield of acetalation was more systematically studied and the best reaction conditions were confirmed. The results show that the molar ratio of butyraldehyde to glycol is 1∶1.4, the quantity of catalyst is equal to 0.25% of feed stocks, the reaction time is 50 min, and the yield of butyraldehyde glycol acetal can reach 75.8%; the yield of benzaldehyde glycol acetal is 68.8% under the following conditions：molar ratio of benzaldehyde to glycol 1∶1.25, the quantity of catalyst 0.5% of feed stocks, the reaction time 50 min.

2009, 22 (3): 5-8. DOI: 10.3696/j.issn.1006-396X.2009.03.002

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Reaseching on Supported Noble Metals over Mn⁃Zr Composite Oxides for the Catalytic Combustion of Vinyl Chloride

Tian Fang, Yiyin Gao, Siyu Wang, Li Wang, Yun Guo, Yanglong Guo

Abstract （2757）

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The Mn?Zr composite oxides were prepared by co?precipitation,loading with noble metals(Ru,Pd,Pt) on the surfaces by a following impregnation method.The effects of noble metals on catalytic combustion of vinyl chloride (VC) were further investigated.The structure and chemical state,the oxidation?reduction ability and acidity,the distribution of acid over the noble metal loading catalysts were studied.Noble metals exist in the form of oxidation state on catalyst surface to promote the reduction of Mn?Zr composite oxides and improve the redox ability of the catalysts. In addition,noble metals not only increased total acid amount but also changed the distribution of Br?nsted and Lewis acid centers on catalyst surface.Therefore, the noble metal made the completely VC conversion temperature shift to lower temperature.However,the activities of noble metals for catalytic combustion of VC varied with the kind of noble metal.Among them,Ru had the more positively activity enhancement than that of Pd and Pt.The catalytic temperatures were 206 and 243 °C, when the VC conversion over Ru/MZ(Ru/Mn_0.7Zr_0.3O_x) reached to 50% (t₅₀) and 90% (t₉₀),respectively,which were 69 and 71 °C lower than that using Mn?Zr composite oxide.Meanwhile,the loading of noble metals also changed the composition of chlorinated by?products and reduced their concentration.The total concentration of chlorinated by?products over Ru/MZ catalyst was only 5.7 μL/L with 90% VC conversion rate,which was 70% lower than MZ composite oxide at the same conversion rate.

2021, 34 (5): 1-8. DOI: 10.3969/j.issn.1006-396X.2021.05.001

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Abstract （2471）

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2022, 35 (3): 0-.

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Progress in Characterization Strategies Mass Transfer Mechanism of Hierarchical Zeolite

Jinyan Zhang, Huan Wang, Yucai Qin, Lijuan Song

Abstract （2335）

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The hierarchical zeolite has become a hotspot in the current molecular sieve research field due to its advantages of efficient mass transfer and shape selection catalysis.The unclear mass transfer optimization mechanism has become a bottleneck restricting the design and development of hierarchical zeolite.This paper briefly introduces recent research and development status of the hierarchical zeolite,reviewes with emphasis the research progress in mass transfer mechanism of Hierarchical zeolite,the current research challenges and the analysis of current research strategy etc,and discussed the significance of mass transfer mechanism in the research and development of graded porous molecular sieve materials and the prospect of future development.

2021, 34 (4): 1-8. DOI: 10.3969/j.issn.1006-396X.2021.04.001

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Abstract （2331）

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2022, 35 (1): 0-.

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Influencing Factors of Coking for Heavy Oil Catalytic Pyrolysis

YANG Lian-guo, MENG Xiang-hai, XU Chun-ming, GAO Jin-sen

Abstract （2262）

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The coking performance for the catalytic pyrolysis of heavy oil with temperature，weight ratios of catalyst －to－oil and steam－to－oil and residence time，was investigated in a confined fluidized bed reactor on catalyst CEP－1，with a special catalyst of catalytic pyrolysis process （CPP） technology．The coke content on catalyst decreases with the increase of the weight ratios of catalyst － to－oil and steam－to－oil and n（H）／n（C） of the feed，and it increases with the enhancement of reaction temperature and aromaticity of the feed．Coke yield increases with increasing reaction temperature，catalyst－to－oil weight ratio and aromaticity，while decreases with increasing steam－to－oil weight ratio and n（H）／n（C） of the feed．Both coke content and coke yield show minimum as residence time of oil gas prolongs．Both n（H）／n（C） and aromaticity of the feed can well reveal the coking tendency of a feed．On the basis of the experimental research，a correlation model of coke content and coke yield with feed property and reaction conditions was established．The parameters in the model were calculated by least square regression.

2009, 22 (1): 22-25.

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Application of Green Fluorescent Protein as Gene Marker for Microbial Enhanced Oil Recovery

ZHANG Zhong-zhi, SUN Shan-shan, WANG Yu-xiao，et al

Abstract （2243）

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In order to obtain more analyses and estimate correctly and accurately to improve Microbial Enhanced Oil Recovery (MEOR), goal strains for MEOR would be marked and tracked to indicate that how and where they moved and reproduced in oil reservoir and show their amount and rate in oil-field microorganism. Recombinant plasmid of pET-30a(+)-EGFP which has the gene of green fluorescent protein (GFP) was constructed and transferred into JD successfully . Recombinant plasmid can be stably maintained in the culture media including 50 μg/mL kanamycin (Kan), which indicated recombinant plasmid stability under choice pressure, while without kanamycin it can be lost easily. JD(gfp) can normally reproduce and metabolize together with wild strain for MEOR isolated from oil reservoir while no transfer of recombinant plasmid.

2009, 22 (4): 34-37. DOI: 10.3696/j.issn.1006-396X.2009.04.009

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Hydrodenit rogenation Performance of Carbazole for Tungsten Phosp hide Catalyst s Containing Vanadium

LI Cui-qing, SUN Gui-da, LI Feng-yan, ZHANG Deng-qian

Abstract （2196）

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γ- Al₂O₃as a support , a series of tungsten phosphide catalyst s containing vanadium were prepared by the method of co - impregnation and temperature programmed reduction ( TPR) in H₂. The catalyst s were characterized by XRD, BET, TG, XPS. Carbazole hydrodenit rogenation ( HDN) activities of catalyst s were tested by a high pressure micro - reactor in condition of 3 MPa , 360 ℃and a space velocity of 4 h^{- 1}. The result show that dispersity of active species WP on the support surface is affected by adding some content of vanadium into tungsten phosphide catalyst. The cooperative effect is greatly between vanadium and support and active species with vanadium content of 5 %, which resulting in a very smaller changing in XRD pattern. Adding some content of vanadium during the preparation of catalyst produced the original phosphiding-reduction temperature of W species on the support surface for catalyst s precursor increasing and phosphiding - reduction extent decreasing, while the amount of high valence of W⁶⁺ on the surface of catalyst s are improved. Catalyst with vanadium content of 1 % is favor to carbazloe HDN reaction, which gaving 12. 7 % higher carbazole HDN conversion than that without vanadium. It is also observed that carbazole HDN reaction showed three paths: a very low direct denit rogenation selectivity (only 3. 2 %, the first path way ) and a high hydrodenit rogenation selectivity ( hydrogenation to saturating one benzene rings followed by denit rogenation, the second path way, and hydrogenation to saturating two benzene rings followed by denit rogenation, the third path way) . The third path way is a primary rout and the HDN selectivity reached 91. 0 %. Compared to the tungsten phosphide catalyst without vanadium , carbazole HDN selectivity of catalyst with 1 % content of vanadium showed a slightly decreased by the first path and gave a 6. 7 % lower by the third path, 7. 3 % higher by the second path.

2009, 22 (3): 24-27. DOI: 10.3696/j.issn.1006-396X.2009.03.007

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Abstract （2174）

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2022, 35 (4): 0-.

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Preparation of Hydrogenation of Nitrobenzene to p-Aminophenol Using NiB/C Catalyst

SONG Wei,WANG Wang-yin,ZHANG Yu,et al

Abstract （2133）

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Supported amorphous alloy NiB/C was used as catalyst, and zinc sulfate solution was used as acidic medium in the preparation of catalytic hydrogenation of nitrobenzene to p-aminophenol.The effect of reaction temperature, reaction pressure, reaction time, mass of NiB/C catalyst and zinc sulfate on the reaction were studied, the range of reaction conditions of higher selectivity of p-aminophenol was obtained. The better experimental program was determined through the establishment of the orthogonal experiment which has five factors and four levels: reaction temperature is 120 ℃, reaction pressure is 0.1 MPa, reaction time is 3 h, the catalyst addition is 3 g, zinc sulfate addition is 4 g. The results show that the conversion rate of nitrobenzene is 86.78%, the selectivity of p-aminophenol and aniline are 15.62% and 76.02% respectively.

2011, 24 (1): 12-17. DOI: 10.3696/j.issn.1006-396X.2011.01.003

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Oxybromination of Phenol Over Phosp horus Molybdenum Tungsten Heteropoly Acid Catalyst Supported on Activated Carbon

GONG Shu-wen, LIU Li-jun, LI Kao-zhen, CUI Qin-xin

Abstract （2106）

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Activated carbon supported phosphorus molybdenum tungsten heteropoly acid as oxybromination reaction catalyst was prepared via immersion method. Catalyst properties were investigated by X - ray diff raction (XRD) and IR methods. And
the oxybromination reaction activity of catalyst was studied with potassium bromide as bromine source and hydrogen peroxide as oxidizer. The result s indicate that the Keggin st ructure is still retaining af ter supported, and the catalyst exhibit s high oxybromination reaction activity and high selectivity of para product . Supported heteropoly acid slightly lost af ter reaction, but the whole physical phase of catalyst has no significant changes.

2009, 22 (3): 21-23. DOI: 10.3696/j.issn.1006-396X.2009.03.006

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The Method of Measurement for Oil Film Shrink Velocity

JIANG Ping，ZHANG Gui-cai，GE Ji-jiang，LIU Hai-tao

Abstract （2101）

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The velocity of the oil film scaling off the solid was used to estimate the surfactant to scale off the oil from the solid．The oil film shrank in the OP or Na₂CO₃ solution was researched．It shows that the oil shrank fastest in the OP－10 solution
and the shrink velocity is close in the OP－8 and OP－30.The oil shrank slowest in OP－40solution．In the Na₂CO₃ solution the area of oil do not change ，but the thickness of the oil changed．It indicates that the OP molecule adsorbs on the water －solid surface and reduces the water －solid interfacial tension．The balance in the contact point is broken and the oil film shrinks．In
the Na₂CO₃ solution，although the oil －water interfacial tension is changed，the solid－water interfacial tension is not changed so that the oil film area do not shrink．The Na₂CO₃ reacts with the petroleum acid and the surface－active substance distribute asymmetrically，so that it causes the interfacial tension gradient and non－uniform thickness．

2009, 22 (1): 61-64.

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The Preparation and Properties of Phosphazene Polymer Electrolyte for Lithium Ion Battery

YANG Ming-shan, LIU Jian-wei, YU Jin,et al

Abstract （2100）

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Polydichlorophosphazene was synthesized from hexachlorocyclotriphosphazene by high-temperature decyclopolymerization, and poly(2-(2-methoxyethoxy)ethanol phosphazene)(MEEP) was synthesized by alcohol-Na ⁺ reaction. The optimal synthesis parameters were obtained, and the structure of MEEP was analyzed by FT-IR, 31P -NMR, 13C-NMR and 1H-NMR. The results show that the product synthesized is MEEP compound. Then polyphosphazene electrolyte was prepared by mixing MEEP with LiCF ₃SO ₃ and its heat stability and ionic conductivity were determined. The results indicate that the electrolyte prepared has high thermo-decomposed temperature, its initial decomposing temperature is more than 200 ℃ and its room-temperature conductivity is up to 1.187×10 ^-4S/cm(25 ℃).

2010, 23 (1): 1-5. DOI: 10.3696/j.issn.1006-396X.2010.01.001

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The Preparation and Characterization of Electrochemical Capability of RuO₂/Polyaniline Composite

CHEN Gao-feng,XU Jie,ZHOU Xun,DU Nan-xuan,

Abstract （2077）

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Nanometer RuO₂ particle were prepared by sol-hydrothermally method using RuCl₃·nH₂O as raw material,and RuO₂ /polyaniline composite were fabricated from aniline polymerization in RuO₂sol by conventional chemical oxidation.The morphology and microstructure were characterized by SEM and XRD,and its electrochemical properties were investigated with cyclic voltammetry.The results indicate that the structure of the composites vary by different mass fraction of RuO₂.When the mass fraction of RuO₂ is 5%,compact RuO₂coats are formed on the surface of polyaniline particles,and electrochemical capacitance of the composite diminish due to polyaniline capacitance disappearance.RuO₂ particles are dispersed in the polyaniline when the mass fraction of RuO₂ is more or less than 5%.The capacitance of the composite reaches the maximum is 374.6 F/g when the RuO₂ mass fraction is 3%.The composite with less RuO₂ content has good electrochemical property which is suitable for supercapacitors.

2009, 22 (4): 1-4. DOI: 10.3696/j.issn.1006-396X.2009.04.001

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The Determination of Intrinsic Viscosity of Super-High Relative Molecular Weight Polyacrylamide

TAO Lei,ZHANG Na,DU Can-min,et al

Abstract （2072）

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For the super-high relative molecular weight polyacrylamide，the rheological behaviour and viscoelasticity were more complicated．The capillary tube method which was based on Newtonian fluid theory had much bigger error on measuring the intrinsic viscosity．The rheological behaviour of super－high relative molecular weight polyacrylamide of Shengli oilfield was analyzed．The viscosity－temperature curve，rheological curve and the viscosity at fixed share rate were measured．Then the experimental condition under low share rate and low concentration was established．The results show that the rheometer is closer to the real relative molecular weight and the linearity of ηs p ／C ～ C and lnηr ／C ～ C are better and mensuration is exact and credible．

2009, 22 (4): 45-48. DOI: 10.3696/j.issn.1006-396X.2009.04.012

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Process Modeling Based on SOM-PCA-RVM and Its Application

LI Xin, YAN Xue-feng

Abstract （2063）

PDF （302KB）（508）

A hybrid modeling method for the complex process was proposed．The process，which was highly nonlinearity，had interacting independent variables， and had process data belonged to different categories． This method combined self－organizing map network （SOM network），principal component analysis （PCA），and relevance vector machine （RVM）．First，
divided the sample datum into several subspaces which had the same patterns with the utilizing of SOM，the pattern space separation was realized．Then derived the principal components based on the modeling samples of each subspace，defined the optimal principal component numbers based on prediction ability，and filtered the redundancy．At last，the principal component
of each subspace was applied as the input of RVM，building the models individually ，and the classifying modeling was realized based on the separated of sample pattern spaces．The simulation results and the application in 4－carboxybenzaldehyde content soft sensor of pureed terephthalic acid production show that the accuracies of regressing and predicting of SOM－PCA －RVM model is better than both RVM model and PCA － RVM model．

2009, 22 (4): 89-94. DOI: 10.3696/j.issn.1006-396X.2009.04.022

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Preliminary Study on Drilling Wastewater Correlated With Three －Sulfonated Mud System Treatment With Aerobic Process

GUO Zhen-ying， Lv Rong-hu，ZHANG Hong-yan,et al

Abstract （2043）

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Drilling wastewater correlated with three－sulfonated mud system hardly reach the standard just by coagulation process，and it costs too much by other physicochemical processes．According to these characteristics of drilling wastewater correlated with three－sulfonated mud system，UV／Fenton－aerobic process was intended to use． Water quality， oxygen uptake rate （OUR）and shake－flask culture method were mensurated to assess biodegradability of the drilling wastewater which was treated by UV／Fenton oxidation．After treating the wastewater，the dehydrogenase activity （DHA） of the activated sludge was tested．The results show that the wastewater have good biodegradable possibility．When the mixed liquor suspended
solids （MLSS） is 3000 mg／L，the removal rate of chemical oxygen demand （COD） can reach to 60.7% and the removal rate of biological oxygen demand （BOD） can reach to 9402% in 4 h by batch wastewater biotreatment．It proves that UV／Fenton-aerobic process is feasible to the drilling wastewater．

2009, 22 (1): 5-8.

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Application of BP Neura1 Network in the Gel Point Prediction of Blend Crude Oil

HOU Lei,XU Xin-yu,LIU Xiu-lian

Abstract （2027）

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The BP neura1 network and the tested gel points of the blend crude oil were studied. A prediction model based on the BP neura1 network was established to calculate the gel point of the blend crude oil. The back-propagation artificial neural network has the satisfactory nonlinear prediction ability. The gel points of the component crude oil and their proportions were taken as the input vector and the gel points of the blend crude oil as the output one. The relationship between the gel points of the blend crude oil and the component crude oil was researched. The results show that the gel point prediction model based on the BP neura1 network is better than other gel point prediction models. The maximum average deviation of the predicted gel point is only 0.128 °C and the average absolute deviation is 0.022 °C. 

2009, 22 (3): 86-88. DOI: 10.3696/j.issn.1006-396X.2009.03.021

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Orthogonal Test of Lubricating Oil Biodegradation Accelerated by Lauroyl Glycine

CHEN Bo-shui,FANG Jian-hua,WANG Jiu,SUN Xia

Abstract （2009）

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Different contents of lauroyl glycine were incorporated into HVI 350 mineral oil and the biodegradabilities of the formulated oils were evaluated on a biodegradation tester. Thereafter, the interaction effect of four factors, i.e. lauroyl glycine content, oil concentration, microbe nutriment composition and oxygen supply, on biodegradation of HVI 350 mineral oil in soil was studied by means of a L9(34) orthogonal test method. The results indicate that lauroyl glycine obviously promotes biodegradation of HVI 350 mineral oil. The biodegradability of HVI 350 oil increases with increasing content of lauroyl glycine while the lauroyl glycine content is smaller than 1.5%. Of the four impact factors, the effect of lauroyl glycine on biodegradation of HVI 350 mineral oil in soil proves to be the most prominent in various biodegradation durations.

2009, 22 (3): 18-20. DOI: 10.3696/j.issn.1006-396X.2009.03.005

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A Convenient Synthesis of Acaricide Propargite

LIU Lin, XUE Shou-qing, QIAN Jian-hua, MA Cheng-xiang

Abstract （2000）

PDF （305KB）（615）

2-(4-tert-butyl-phenoxy) cyclohexanol was synthesized through the reaction of 4-tert-butylphenol with epoxycyclohexane in the presence of catalyst, and through two steps of thionyl chloride derivatives alcoholysis, neutralization to produce propargite under condition of 15 ℃. 1NMR and IR were performed to determine the structure of intermediates and final product. The results show that the analytical sample is identical to authentic, and the chemical structure and the quality of this compound agreed with those of imported samples. Factors influencing the reaction yield were studied, such as feeding mode and reactions times. The optimum technical condition: 2-(4-tert-butyl-phenoxy) cyclohexanol is prepared from 4-tert-butylphenol and epoxycyclohexane and then thionyl chloride derivatives alcoholysis chlorinated sulfoxides to get intermediates. Intermediates reacted with propargyl alcohol in the presence of toluene to obtain the target material of 2-(4-tert-butyl-phenoxy) cyclohexanol. The total yield can be reach to 82% (based on 4-tert-butyl-phenol) and the purity is 98%.

2010, 23 (1): 47-49. DOI: 10.3696/j.issn.1006-396X.2010.01.012

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Preparation of Extremely Pure Naphthalene From

XIONG Jie-ming, FENG Hui, GONG Liang-fa, ZHANG Li-ping

Abstract （1999）

PDF （369KB）（558）

Extremely pure naphthalene is the raw materials of some high level industrial products, and it can be attained from the industrial naphthalene fraction by desulphurization and purification. The primary impurity in industrial naphthalene fraction is the sulfide thionaphthene, which is very difficult to be removed off by ordinary separation methods. Oxidative desulphurization with oxidant hydrogen peroxide and catalyst formic acid was studied, and the effects of formic acid amount, hydrogen peroxide amount, reaction temperature and reaction time on desulphurization ratio were investigated experimentally. The result indicates that the desulphurization rate simply increases with the increasing of formic acid amount, but it increases at first and then goes down with the increasing of hydrogen peroxide amount, and there is an optical amount range. The viscosity decreases with the increasing of temperature, which is help to the mixing of oil and water phase, and thus to improve the reaction and the desulphurization rate, and the optical temperature is 89~92 ℃. Under the optimized condition of n(H)/n(F)=3.65, n(H)/n(S)=8.49, 89 ℃ and 60 min, the desulphurization rate can reach to 97.90%, and after purified the oil phase by distillation to remove the [KG*4]resultant [KG*4]and [KG*4]the non-sulfide impurity, the content of naphthalene in the product is more than 99.90%, and is clearly higher than the industrial product(97.06%).

2009, 22 (1): 36-40.

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Progress in Cathode Materials for Sodium⁃Ion Batteries

Jiyuan You, Yongan Cao, Shaoliang Meng, Jiucheng Zhao, Jun Wu, Wenju Wang

Abstract （1989）

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Against the background of fossil fuel exhaustion and lithium resources shortage,sodium?ion batteries are considered promising secondary batteries due to their abundant resources,low theoretical cost, good quick?charge performance and excellent low?temperature performance.They are expected to play a key role in developing new energy,large?scale energy storage and low?speed electric vehicles.The selected cathode material is one of the important factors influencing the energy density,cycling performance and rate performance of a sodium?ion battery.This paper reviews the cathode materials of sodium?ion batteries,including transition metal oxides, polyanionic compounds,Prussian blue compounds and organic compounds.The paper introduced the advantages and disadvantages of sodium?ion batteries,analyzed the characteristics and research focuses of various cathode materials,and provided an outlook on the development direction of cathode materials for sodium?ion batteries.

2022, 35 (2): 1-8. DOI: 10.3969/j.issn.1006-396X.2022.02.001

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Purifying Diesel Exhaust Over La_{1 - x} K_xCoO₃ Perovskite - Type Catalyst

ZHU Ling,LIANG Cun-zhen,YU Jun-jie

Abstract （1969）

PDF （343KB）（639）

A series of pervoskite - type oxides , La_{1 - x} K_xCoO₃complex catalyst s , with nanomet ric size were synthesized with low temperature through a combustion process. The catalyst s were characterized for crystal st ructure and chemical composition using H₂ - TPR ,XRD ,BET and chemical analysis. The catalytic activities in simultaneous removal of NOx and soot f rom diesel exhaust were evaluated via temperature programmed oxidation ( TPO) equipment , and the effluent s of crystal st ructure and chemical composition on the catalytic activities were also discussed. The result s show that after partial substitution of La ^{3 +} with K⁺ , the st ructure and component of La1 - x KxCoO3 will be changed. When x ≤0. 3 , La_{1 - x} K_xCoO₃is single rhombic perovskite- type phase , the crystal parameters and crystal distances are also increased. And when x ≥0. 4 , Co3O4 is detected in the
samples. La_{1 - x} K_xCoO₃catalyst s have better catalytic activities for simultaneous purification soot and NOx . La0. 7 K0. 3 CoO3 , with the biggest amount s of non - stoichiomet ric oxygen and oxygen vacancy , shows the highest catalytic activities. The ignition temperature for soot combustion on La0. 7 K0. 3CoO3 is dropped to 290 ℃, the conversion ratio of NOx can reach to 53%.

2009, 22 (3): 37-41. DOI: 10.3696/j.issn.1006-396X.2009.03.010

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The QSPR Research on t he Olfactory Thresholds of Alip hatic Alcohols

DU Xi-hua, CHEN Yan

Abstract （1966）

PDF （198KB）（653）

Atomic characteristic value f i of aliphatic alcohols were defined and calculated for QSPR research of aliphatic alcohols, then topological parameter and hydrogen line index H were acquired by the technique of molecule graphics and AM1. QSPR for estimating olfactory thresholds ( POL ) of aliphatic alcohols were achieved based on multiple regression. The regression equations were proposed. The mean error between estimated values and experimental value of 50 aliphatic alcohols is
0. 46 ,while the olfactory thresholds of other 49 aliphatic alcohols molecules were predicted by the regression equation , the mean error is 0. 67. The result s show that the model developed can make a better agreement among estimated values ,predicted values and experimental value.

2009, 22 (3): 28-32. DOI: 10.3696/j.issn.1006-396X.2009.03.008

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Singular Stress Fields and Fracture for Periodic －Arrayed Indentation （Part II ：Critical Load for Cracking）

WANG Xiao-hua, MA Ying-li, SUN Zhuang, XIE Yu-jun

Abstract （1948）

PDF （256KB）（662）

Periodic－arrayed indentation is one of the powerful tools in investigating the near surface properties of materials in the micro－/nano－scale．When an elastic substrate in half－plane was subject to indentations by a rigid ，flat － ended punch ，a singular stress field and K－dominant region should arise adjacent to the punch edges．When the intensification of such singular stress fields reaches its critical value， fracture will take place on the surface of the contact boundary． The cracking of indentation was a new type of fracture problem．By using the energy release rate of boundary translation the fracture of indentation has been formulized and critical load and critical cracking angle of the indentation have been found.

2009, 22 (2): 63-65.

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Experiments for Hydrate Formation of R141b Emulsions Formed With High Speed Stirring and Ultrasonic

ZHOU Xi-tang,LIANG De-qing,DU Jian-wei

Abstract （1941）

PDF （335KB）（651）

In order to solve the problem of refrigerant hydrate formation in a static state ，the Tergitol TMN－6 as emulgator，R141b emulsions were prepared with speed stirring and supersonic respectively，then formed hydrate and decomposed under the condition of program control temperature．The results show that O／W R141b emulsion can be formed with both of the two methods．The two emulsions，at static state，can begin to be formed hydrate within 1.5 h after start of air bath，and finish in 2 h．It is easy for decomposition liquid to be emulsified and to be formed hydrate again．With this method，it can be performed in several hours for a study on hydration mechanism，which provides academic foundation for the application of refrigerant hydrate to cold accumulation air－conditioner．

2009, 22 (3): 14-17. DOI: 10.3696/j.issn.1006-396X.2009.03.004

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The Microstructure and Surface Fractal Characters of Montmorillonite Modified by Quaternary Ammonium Salts

ZHENG Guang, GAO Mang-lai,LUO Zhong-xin, LI Xiao-yan

Abstract （1931）

PDF （389KB）（940）

Na-montmorillonite(Na-MMT) was modified by gemini quaternary ammonium salts (MD, DMB) and mono-quaternary ammonium salt (HTMAB) through the intercalation. Changes in the surfaces and microstructure were characterized using N ₂ adsorption isotherms, X-ray diffraction(XRD), and fourier transform infared spectrometer(FT-IR). The results show that the BET surface area and the basal spacings of MMT are reduced when modified by MD, DMB or HTMAB, which is contrast to the MMT when modified by the monovalent quaternary ammonium salts with long chain. The quaternary ammonium salts have intercalate into the interlamellar space of montmorillonite and the microstructure has changed. The surface properties change from hydrophilic to hydrophobic. In addition, the fractal dimension(D) of organo-MMT is decreased, that is to say, the porosity distribution is more uniformity. 

2011, 24 (1): 6-11. DOI: 10.3696/j.issn.1006-396X.2011.01.002

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Modified Y Zeolites and Their Behaviors in Selective Adsorptive Desulfurization for FCC Gasoline

ZHU He-li, SONG Li-juan, GAO Xiang, et al

Abstract （1925）

PDF （339KB）（559）

NaY zeolite was modified with oxalic acid. The HY zeolite were obtained by liquid phase ion exchange. And two Y zeolites (NaY,HY) were compared by selective adsorptive desulfurization from FCC gasoline.The results show that the HY zeolite adsorptive desulfurization effect is better than NaY zeolite. The molded HY zeolite is more effective than the unmolded HY zeolite. HY zeolite which contained 25%(mass fraction) γAl ₂O ₃ is more effective than HY zeolite which did not. When the static adsorptive desulfurization time of HY zeolite is 6 h,mass ratio of solid and fuel is 1∶3, WHSV is 0.5 h ^-1 ,the effect of HY is the best. The rate of regeneration of the molded HY zeolites is 92.69%.

2009, 22 (2): 49-51.

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Design of Annular Rubber Seal for t he Oil - Water Well Device Under Pressure Operation

CUI Bin,WU Ying-xiang,XU Jing-yu

Abstract （1911）

PDF （416KB）（539）

The rubber seal issue under operating system has been studied by the theory of dynamic sealing. The deformation and st ress dist ribution of rubber material were calculated under the well in - pressure and sealing out - pressure using the non -
linear finite element . Through the experimental study of the rubber st rength and fatigue, the intensity limit and the fatigue life were obtained. According to the study results, a new type of sealing equipment was designed by adding the reinforcing steel bar into rubber core to reduce the maximum shear st ress, so as to solve the problems of dynamic seal under hyperbaric pressure.

2009, 22 (3): 79-82. DOI: 10.3696/j.issn.1006-396X.2009.03.019

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Preparation of Superabsorbent With Gracilaria Lemaneiformis Under Microwave Irradiation and Its Performances

XU Ping-fan, LIU Ming-hua, HUANG Piao-piao,et al

Abstract （1904）

PDF （979KB）（460）

To prepare a kind of superabsorbent polymers by gracilaria lemaneiformis，superabsorbent polymer was synthesized by means of microwave irradiation. Acrylic acid and acrylamide were grafted onto gracilaria lemaneiformis by using potassium persulfate as an initiator in the presence of N, N′-methylenebisacrylamide (MBA) as a crosslinker. The univariate analysis was visually analyzed to choose the optimal conditions. The structure of LSAP was confirmed while the absorbing properties, swelling rate and water retention were investigated. The optimum conditions show that the mass ratio of monomer to gracilaria lemaneiformis is 2∶1, the mass amount of initiator is 0.4%, the mass amount of crosslinker is 0.06% and the microwave power is 500 W respectively. Under the optimum condition, the absorbency of LSAP is up to 1 102 g/g in deionized water, 104 g/g in NaCl and 86.1 g/g in artificial urine, respectively. The performance test of LSAP indicates that it has faster absorbent velocity and excellent water retention. 

2010, 23 (1): 30-33. DOI: 10.3696/j.issn.1006-396X.2010.01.008

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Design of Seal Structure in Compressor for Air Source Heat Pump Heat Unit

ZHOU Dao, TIAN Xu-dong, ZHONG Yu, WANG Lei

Abstract （1882）

PDF （294KB）（538）

２D axisymmetric model of seal structure in compressor for air source heat pump heat unit was established by using nonlinearity finite element theory of large deformation and contact problem．Some typical parameters of the seal structure
which might have the impact on the sealing performance ，such as gap^,s dimension between flanges，chamfer radius of the groove，groove depth and groove width， were analyzed． It is show that the gap between flanges influences the maximum contact pressure and shear stress are very much，groove depth and groove width have a remarkable influence on the maximum
contact pressure and chamfer radius of the groove has a little impact on shear stress.

2009, 22 (2): 52-55.

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Technology of Phaeodactylum Tricornutum to Extract Fatty Acid for the Biodiesel Production

HE Feng, FU Peng-cheng,XU Chun-ming

Abstract （1882）

PDF （300KB）（912）

In order to understand the effect of light，carbon sources and concentration on the phaeodactylum tricornutum, the culture medium containing glucose，acetate and glycerol were chose, the biomass, cell concentration, biochemical substances and fatty acid content were tested. The results show that the phaeodactylum tricornutum is photoautotroph and mixotroph, which with selectivity for substrate concentration and organic carbon sources, the optimum concentration of glucose is 20 mmol/L, the optimal growth condition in 500 mL flask contains that the temperature is （25±1） ℃, the light intensity is 50 μmol/(m2·s), the pH is 7.5. Whatever the carbon sources are able to promote the biomass accumulation. When the cell concentration achieve to 2.5×106 cells/mL in the evening of the culture, the protein, sugar, chlorophyll and TOL content were analyzed. The biomass accumulation and biomass change in different growth conditions were determined. By ultrasonic extraction and Soxhelt extraction, the total of lipid reaches 20%(dry weight); The fatty acid content and composition with GC-MS were measured, and found the C16∶0 and C16∶1 are 34.8% and 11.9% (mass fraction) respectively, which are more than other components and could be used to extract bio-diesel.

2011, 24 (1): 1-5. DOI: 10.3696/j.issn.1006-396X.2011.01.001

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Effects of Phenols on Storage Stability of FCC Gasoline

WU Shi-kui，HUANG Ke-Ming，LIANG Chao-lin，CAO Guang-Jing

Abstract （1878）

PDF （310KB）（558）

Based on the test data correlation of the FCC gasoline composition, induction period and absorbance, influence law of phenols on storage stability of FCC gasoline were analyzed. The results show that the phenols compounds in the FCC gasoline are antioxidant and acidic catalyst of creating color and resins. The more phenols in the FCC gasoline, the longer the induction period is and the faster the color do. When phenols content in the FCC gasoline is more than 200 μg/g, induction period of FCC gasoline is decrement as diene number increment; and storage absorbance is increment as both diene number and basic nitrogen increment. Otherwise phenols content is less than 120 μg/g, the FCC gasoline color is steady，but induction period is shorter. The change of gasoline storage absorbance or induction period is smaller, when the diene value is from 0.7 to 2.6 g(I2)/(100 g). The phenols content is controlled by optimizing catalytic feed, controlling basic pre-wash deepness and optimizing various gasoline blend as well as adding antioxidant, so storage stability of gasoline is improved.

2009, 22 (1): 13-16.

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Void Fraction Measurement by Single Wire Capacitance Probe

LIANG Fa-chun, CHEN Jing, CAO Xue-wen

Abstract （1852）

PDF （246KB）（514）

Using a swirl element mounted upstream of the test section，the asymmetry flow patterns such as stratified flow，annular flow were transformed into annular flow with uniform film thickness．Then a single electrical capacitance probe was
applied to measure the film thickness to obtain the mean void fraction．Extensive experiments were carried out in an air－water two phase flow loop．The results show that the capacitance probe output is the function of liquid film thickness and independent of liquid property and temperature．During the wide experimental range the void fraction measured by the single capacitance probe agreed well with that obtained by quick closing valve method．Since the flow pattern is transformed to symmetry type， the gas and liquid distribution along the probe wire can represent the whole section， the shortcoming of traditional probe
measurement method and tomography method is escaped．

2009, 22 (2): 70-72.

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Stability of Viscosity of Polymer and ASP Solution Prepared by Produced Water After Aeration

JIA Ling-zhi, ZHANG Chun-ling, BAI Yun-peng,et al

Abstract （1849）

PDF （963KB）（494）

Because of the low viscosity of the solution prepared by common produced water, the oil recovery was not high. Therefore, the solution has to be prepared with tap water or other water of high quality, which leads to high consumption of fresh water. Produced water after aeration was used to prepare hydrolyzed polyacrylamide (HPAM) or alkaline-surfactant-polymer (ASP) solution. The thermal stability of the prepared solutions was investigated. The influences of shear, sulfate-reducing bacteria (SRB), the alkali and the viscosity stabilizer on the solution viscosity were also investigated. The experiment results show that shear degradation is the major factor in viscosity loss of the solutions and the aeration had good effect to reduce the viscosity loss caused by SRB. The experiment results also show that the HPAM solution has a better capability to keep viscosity in the presence of viscosity stabilizer when it is subjected to 30-day aging, and so do the ASP solution when alkali and viscosity stabilizer are present.

2010, 23 (1): 10-15. DOI: 10.3696/j.issn.1006-396X.2010.01.003

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Oil－Gas Exploiting Monitoring System Based on WSN

LI Yong, WANG Ping, CAI Lin-qin, WANG Heng

Abstract （1847）

PDF （330KB）（580）

Large scale application of wireless sensor net for industry field monitoring and control is inadequate based on the analysis of oil－gas exploiting process，The feasible well－site monitoring system solution，which adopt suitable techniques
were proposed．The solution includes：wireless instrument interface card，star and Mesh topology，hybrid power supply of main and battery，power management based on application requirement．The simulation result of dynamic power management indicates that large percentage battery power can be saved under steady operation conditions．

2009, 22 (2): 85-87.

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Abstract （1842）

HTML

PDF （1539KB）（73）

2022, 35 (2): 0-.

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Multi － Fieldbus Distributed Control System Based on Multi － Agent System

ZHANG Lie-ping, ZHANG Yun-sheng, CHENG Da-fang

Abstract （1841）

PDF （327KB）（522）

According to the architecture and the characteristics of multi －fieldbus distributed control system，a novel multi －fieldbus distributed control oriented hierarchical and distributed multi －Agent system （MAS） architecture was constructed and
designed．The MAS was composed of system control Agent ，region control Agent and on－site Agent．It used OPC technology as communication mode throughout the whole system．By introducing the concept of regional Agent group，the system adopted a regional management based on Internet to realize effective management of the regional Agent group and the distributed coordinated control ．Finally，the main functions of each Agent were designed，and the communication model and the working process of multi －Agent system were also analyzed．

2009, 22 (1): 89-92.

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Structure Changes of Asphaltene in Residue Hydrotreating

SUN Yu-dong,YANG Chao-he,SHAN Hong-hong,SHEN Ben-xian

Abstract （1838）

PDF （169KB）（881）

The asphaltene structure and composition changes pre-and post hydrotreating of residue with different asphaltene contents were researched by 1H-NMR, elemental analysis and molecular weight determination, et al. The results show that the molecular weight, H/C, σ, w(HAU)/ w(C), w(Hα), w(Hβ), w(Hγ) and substituted aromatic-carbon ratio of asphaltene decreased after hydrotreating; but aromatic-carbon ratio, w(HA), protonic aromatic-carbon ratio increased. All above factors show that the condensation degree of asphaltene after hydrotreating is increased and asphaltene is dealkylation in residue hydrotreating. Sulfur in asphaltene decreased but nitrogen increased. The aromatic ring and naphthene ring of hydrotreated asphaltene increase with the increase of asphaltene content in feedstock. The aromatic ring numbers of hydrotreated asphaltene even more than that of original asphaltene. Asphaltene react in the forms of structure units in residue hydrotreating. The reaction mechanism of asphaltene in hydrotreating is free radical reaction and carbonium ion reaction.

2010, 23 (4): 5-9. DOI: 10.3696/j.issn.1006-396X.2010.04.002

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Experimental Simulation on Dissociation Behavior of Propane Hydrate by Methanol Glycol Solution Injection

DONG Fu-hai,ZANG Xiao-ya,FAN Shuan-shi,et al

Abstract （1836）

PDF （365KB）（672）

The characteristics of propane hydrate dissociation by methanol injection (mass fraction of 30.0％,60.1％,80.2％,99.5％) were investigated using a self-made visual equipment. The results indicate that the liquid temperature decreased slowly and the pressure in the reactors grew linearly when the dissociation reaction began, moreover, the dissociation time decrease with the methanol concentration’s increase,but the degree of decrease became weaker. The average dissociation rates are 0.020 59～0.045 35 mol/(min·L)，and increase linearly with the concentration of methanol solution. Compared with pure water injection, methanol injection reduces dissociation heat of gas hydrate and accelerates gas hydrate dissociation rate. The enhancement of concentration of methanol is benefit to promote dissociation of hydrate.

2009, 22 (3): 9-13. DOI: 10.3696/j.issn.1006-396X.2009.03.003

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Estimation of Thermodynamic Properties of PBTAs Using the Molecular Electronegativity Distance Vector

CHEN Yan， DU Xi-hua

Abstract （1806）

PDF （295KB）（515）

Based on the molecular electronegativity distance vector, the quantitative structure-property relationship (QSPR) models of the thermodynamic properties (standard enthalpy H ⁰，free energy G ⁰，heat capacity at constant volume C ⁰ _V and standard entropy S ⁰) were constructed for TA and 75 PBTAs. From the four parameters of the model, it was known that the molecular structure fragents: [CDS1]CH—,[CDS1]Ｃ＜,－S－,－Br were all the dominant influencing factors of thermodynamic properties. The optimal bivariate correlation (R ²) of these QSPR models were all 1.000, and the calculated values were in good agreement with experimental data and favorable with literature data. The results show that the possess better predictability and robustness by Jackknifed method and cross-validation procedure. It can be expected that the molecular electronegativity distance vector will be used widely in quantitative structure-property/activity relationship research.

2009, 22 (4): 29-33. DOI: 10.3696/j.issn.1006-396X.2009.04.008

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KPCA － RVM Modeling Method and Its Application for Soft Sensor

YAN Xue－feng, CHEN Jia, HU Chun－ping, QIAN Feng

Abstract （1805）

PDF （282KB）（583）

A novel modeling method integrated KPCA with RVM was proposed． The kernel primary component analysis （KPCA） was employed to identify the principal components from the nonlinear transform data of independent variables，which were regarded as character variables．Regression between character variables and dependent variables was done based on RVM，and the optimal number of the character variables was adaptively determined according to the generalization performance of the regression model．Thus ，KPCA－RVM method could eliminate the disturbance of redundant information and achieve the best nonlinear model with good generalization performance．The method of KPCA－RVM was demonstrated by a 4－CBA’s content soft －sensing of PTA．Simulation results show this method is effective and the performance is better than those of PCA－RVM and RVM．

2009, 22 (1): 82-85.

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Depressive Effect of Polyacrylate （PA） Pour Point Depressant on Waxy Crude Oils

YANG Fei, LI Chuan-xian, LIN Ming-zhen, LI Zhi-yan, YU Tao

Abstract （1761）

PDF （464KB）（644）

Using differential scanning calorimeter （DSC ）， the crystallization abilities of polyacrylate （PA） pour point depressant and waxy crude oils doped/undoped with PA were studied；then the morphology of wax crystals in the waxy crude
oils doped/undoped with PA was investigated through a polarized light microscope and the depressive effect of PA on Changqing and Qinghai waxy crude oils was evaluated by the pour point tests and rheological experiments．The results show that the crystallization ability of PA improved greatly by increasing the alkyl side chain length of PA but kept unchanged with the increase of average molecular weight of PA．The addition of PA can inhibit the wax precipitation and decrease the wax appearance temperature of waxy crude oils．The size of wax crystals become larger and the structure of them become compact after PA addition，leading to the great improvement of the low temperature rheology of waxy crude oils．The depressive effect of PA on waxy crude oils are related to the crude oil composition and the molecular structure of PA．With the increasing of wax content and the fraction of wax with large carbon number， the depressive effect greatly decreased． The average molecular
weight of PA affected its depressive effect by controlling the solubility of PA in waxy crude oils：the solubility of PA in crude oils decreased with increasing the average molecular weight of PA， thus reducing the interactions between waxes and PA molecules and inhibiting the depressive effect of PA．The better matching the alkyl side chain of PA with the carbon number ofwax in crude oils，the better depressive effect of PA．

2009, 22 (2): 20-25.

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Composition of Petroleum Sulfonates and the Influence to Interfatial Tension of Oil／Water System

DUAN You-zhi, LI Yang,FAN Wei-yu,LI Shui-ping,et al

Abstract （1761）

PDF （336KB）（731）

Active fractions were extracted from series petroleum sulfonates by extraction and back－extraction method，the equivalent weight distribution of them were analyzed by ESI－MS spectrum and the average equivalent weight could be calculated，as well as gas－phase osmotic method was conducted to determine the average relative molecule mass of their oleophylic groups which were obtained by desulfonation．The interfacial tension of oil／water system respectively consisted of series petroleum sulfonates or their active fractions were measured by rotated dropping method．The results show that the difference of the equivalent weight distribution mainly existed in the low and high equivalent weight section，and the one which has properly hydrophile－lipophile balance for the complementation of molecule structure benefiting from broad equivalent molecule weight distribution，its oil／water system can obtain the ultralow interfacial tension．

2009, 22 (3): 46-50. DOI: 10.3696/j.issn.1006-396X.2009.03.012

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Electrochemical Behavior in Chinese Typical Simulated Soil Solutions of X８０ Pipeline Steel

DONG Mei, WU Ming

Abstract （1738）

PDF （333KB）（555）

The microstructure of X80 pipeline steel systemically was characterized by optical microscope, scanning electronic microscope, and transmission electron microscope, and studied electrochemical behavior of X80 pipeline steel in Ku'erle simulated soil solution, NS4 solution and Yingtan simulated soil solution by Potentiostat/Galvanostat model 2273. It is shown that the microstructure of X80 pipeline steel is characterized by polygonal ferrite, acicular ferrite, and martensite-austenite (M/A) constituents. There are dislocation cells and sub-grains in a ferrite grain and a lot of dislocation tangled around ferrite grain boundaries. Only active region, and no

active-passive transition region is found in polarization curves of X80 pipeline steel in Ku'erle simulated soil solution, NS4 solution and Yingtan simulated soil solution. Corrosive current density of X80 pipeline steel is the largest in Ku'erle simulated soil solution, and less in NS4 solutions, and the least in Yingtan simulated soil solution. Corrosive current density of X80 pipeline steel in Yingtan simulated soil solution is close to that of in NS4 solutions, but both of them much less than that of in Ku'erle simulated soil solution.

2009, 22 (2): 66-69.

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The Preparation and Curing Kinetics of the Silicon － Containing Epoxy Resin

YANG Ming-shan, HE Jie, LIU Zheng

Abstract （1725）

PDF （281KB）（610）

Silicon－containing epoxy resin （CNE －Si） was synthesized from diphenylsiandiol （DPSD） and ortho－cresol novolac epoxy resin with SnCl_２ as catalyst．The chemical structure of CNE－Si prepared was characterized by FT－ IR，^１H －NMR ．The thermal stability was analyzed by TGA．The results show that the －Si－group enhanced the thermal stability of the epoxy resin．The curing kinetics of the system is studied by isothermal DSC．The kinetic parameters of the curing reaction including the activation energy and reaction order are calculated using Kissinger and Ozawa method，which offer basic date for the application of CNE－Si ．

2009, 22 (2): 1-4.

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Simulation and Optimization for New Type VSP Logging Tool Eccentering Machinery Based on ADAMS

XING Jia-le, LIU Li

Abstract （1718）

PDF （401KB）（630）

New type VSP logging tool uses hydraulic and mechanical complex st ructure. It can avoid the failure of breaking eccentering machinery arms which caused by seizure of driving screw , and can withdraw the logging tool safely. Based on
ADAMS sof tware a mathematics model was established by choosing sensitive unit s size as varieties to do the analysis of dynamicsimulation, and also used penalty function to optimize the system. The simulation model also took eccentering machinery arms and support arms into consideration to adopt different well’s diameter, the range of testing well could be f rom 100 to 420 mm.
Af ter the experimental stage, this system can work steadily 2 000 times without stop under the condition of 180 ℃, water, drilling mud, oil and other kinds of erosive fluid, and the t ravel length can reach 10 000 m, the reliability arrives above 98 %. The using of virtual prototyping shorts the design periodicity, and the theoretical data is relative to the actual data which is obtained through experiment f rom physical prototype. New type VSP logging tool eccentering machinery is improved f rom the older one, and can avoid the t rouble of disassembly and save the cost a great deal.

2009, 22 (3): 75-78. DOI: 10.3696/j.issn.1006-396X.2009.03.018

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A Slide Mode Control-Common Model Control Controller for BUCK Converter

CHANG Liang， FAN Si-liang， GUO Bing-jun

Abstract （1718）

PDF （291KB）（492）

A slide mode control－common model control（SMC－CMC） controller was proposed to deal with the time－variable and complexity of the switching mode power converters．Using the state－space average modeling method，a nonlinear model of BUCK converter working on current conduction mode （CCM） was set up．Dynamic neural network which was constructed based
on a number of integrators and RBF neural network was employed to approximate the inverse model of the dynamic system． Using this inverse model to build a CMC controller．The introduction of slide mode control was to improve the robustness of controller．The modeling and simulation of system was implemented under Matlab／Simulink．The result of simulation confirms
show that the SMC－CMC control schemes are capable of reduced steady state error and improve controll‐er's reliability during supply change and load variations．

2009, 22 (4): 95-98. DOI: 10.3696/j.issn.1006-396X.2009.04.023