Journal of Petrochemical Universities
Annual Contents
Journal of Petrochemical Universities 2010 Vol.23
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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
Abstract2100)      PDF (998KB)(586)      
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
Influence of pH on Photocatalytic Performances of Nanometer Bismuth Oxide Powders Prepared by Hydrothermal Synthesis Method
SUN Tong, GAO Jie, MU Bai-chun
Abstract1037)      PDF (1207KB)(464)      
Nanometer bismuth oxide powders were prepared by hydrothermal synthesis method which used bismuth nitrate
solutions as crude material ,strong aqua ammonia as mineralizerd and chose pH in the range of 7~10. The photocatalytic
performances of the samples were estimated by degrading Rhodamine B .The results show that the reaction of photocatalytic
degradation of Rhodamine B follows the surface first law .When pH is 8.5 ,the photocatalytic performance is the optimal .Results of X - ray diffraction (XRD),Transmission electron microscopy (TEM ) and Infra - red (FT - IR) show that the
samples contain bismuth oxide,ammonium nitrate crystal .With pH increasing ,content of bismuth oxide increase and their
structures are excellent .The bismuth oxide powders are spherical shape or strip and connect to networks .When pH is8.5 ,the nanometer networks are even thickness and net wires are homogeneous .
2010, 23 (1): 6-9. DOI: 10.3696/j.issn.1006-396X.2010.01.002
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
Abstract1849)      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
Effect of Ethylene-Vinyl Acetate Copolymer on the Zeta Potential of Wax Crystal
SONG Zhao-zheng, TANG Fei, ZHENG Ai-ping,et al
Abstract1342)      PDF (476KB)(540)      
The effects of ethylene-vinyl acetate copolymer(EVA) on the Zeta potential of wax crystals were studied by micro-electrophoretic equipment. The results show that when EVA content is low, the Zeta potential increases with EVA content. When EVA content reaches 600 μg/g, the Zeta potential(9.8 mV) doesn't increase with the increasing of EVA content. When the average carbon atom number of ethylene chain reaches 30 or so, the Zeta potential reaches the maximum 10.86 mV. When VA chain content reaches 45%, the Zeta potential reaches the maximum 15.0 mV. When the branch degree of EVA increases, the Zeta potential of wax crystals reduces. When the average molecular weight of EVA reaches 1.2×10 4, the Zeta potential reaches the maximum 11.8 mV. 
2010, 23 (1): 16-18. DOI: 10.3696/j.issn.1006-396X.2010.01.004
Catalytic Properties of Ultrafine SiO2 Supported Amphiphilic Phosphine-Rh Complex Catalyst
PENG Qing-rong, HOU Shi-cong, ZHANG Chun-rong,et al
Abstract832)      PDF (810KB)(446)      
Because of the lower activity of higher olefins in aqueous/organic biphasic catalysis system and the catalyst
separation of homogeneous catalysts ,ultrafine SiO2 nanoparticles were used as supports to immobilize amphiphilic phosphine -
complex to obtain supported catalysts for hydroformylation of 1 - hexene .Compared to the supported aqueous - phase catalysts
(SAPC) on ultrafine SiO support ,the ultrafine SiO2 - supported catalyst with amphiphilic phosphine - complex presented a
higher hydroformylation performance over a relatively wider range of support hydration .Since the water was distilled to organic
phase for more times recycled catalysts ,the drawbacks of ultrafine SiO supported water - soluble phosphine - Rh complexes
catalyst could be avoided by using supported liquid - phase catalyst prepared by using amphiphilic phosphine - Rh complexes ,
obtaining higher activity and selectivity of hydroformylation .
2010, 23 (1): 19-22. DOI: 10.3696/j.issn.1006-396X.2010.01.005
Refinery Residual Sludge Reduction Technologies by Using Multi-Function Microbe
ZHANG Zhong-zhi, ZHONG Wei-zhang, MU Hong-yan
Abstract958)      PDF (1237KB)(558)      
The refinery residual sludge reduction using multi-function microbe,which consists of mixed yeast strains,photosynthetic bacteria and mixed bacteria was studied. After a period of research time,the excess sludge reduction experiment shows that function microbe was improved the reduced effect of excess sludge significantly.The results show that compared with blank test,MLSS removed rate of the sludge are increased by 13.81% for mixed yeast strains,by 30.58% for mixed photosynthetic strains and by 37.94% for mixed microflora.Sedimentation performance of excess sludge is improved after the activity of the multi-function microbe.The pH value is all gradually reduced.The effect of multi-function microbe degeneration changed the component of petroleum obviously.It strengthened the degeneration degree of normal hydrocarbons that have low and moderate carbon.The multi-function microbe environment is favorable to degenerate the high-carbon hydrocarbons into the low-carbon hydrocarbons.
2010, 23 (1): 23-26. DOI: 10.3696/j.issn.1006-396X.2010.01.006
The Effects of Bromination Condition on the Microstructure of Brominated Butyl Rubbe
ZHANG Yang, LI Shu-xin, GUO Wen-li
Abstract953)      PDF (537KB)(556)      
Brominated butyl rubber was prepared by solution method, and its microstructures were characterized by 1H-NMR. It has three main microstructures, that is the unbrominated isoprene structure (structureⅠ), the exomethylene allylic bromide structure (structure Ⅱ) and the bromomethyl olefinic structure (structure Ⅲ). The effects of contact time, residence time and pH after neutralization on microstructures were investigated. The results show that the brominated reaction is complete in 1.5 initial contact minutes, and prolonging contact time or under alkaline condition can accelerate isomerization of brominated butyl rubber from structure to structure Ⅲ.
 
2010, 23 (1): 27-29. DOI: 10.3696/j.issn.1006-396X.2010.01.007
Preparation of Superabsorbent With Gracilaria Lemaneiformis Under Microwave Irradiation and Its Performances
XU Ping-fan, LIU Ming-hua, HUANG Piao-piao,et al
Abstract1904)      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
Influence of Rejuvenators on Recycled Asphalts in Temperature Susceptibility
LI Jin, WANG Jin-feng, XU Meng,et al
Abstract954)      PDF (665KB)(572)      
Three kinds of simulation aged asphalt were recycled by three different rejuvenators . Penetration index and
viscosity temperature susceptibility were used to evaluate temperature susceptibility of recycled asphalts . All of the three
rejuvenators recover the aged asphalts in temperature susceptibility at low and mid - high temperature . The effect of
rejuvenator C is better than others . No obvious laws are found at middle temperature , the rejuvenators increase the aged
asphalts temperature susceptibilities .Rejuvenator A decreases the temperature susceptibility at high temperature ,however B
and C increase a little .With the components analysis of rejuvenators it can be concluded that saturates decrease the temperature
susceptibility of high temperature ,while the aromatics can increase it at high temperature .
2010, 23 (1): 34-38. DOI: 10.3696/j.issn.1006-396X.2010.01.009
Synthesis, Characterization and Hydrogen Storage Capacity of MIL-53
SUN Li-na, YIN Zuo-juan, ZHANG Xiao-tong,et al
Abstract1044)      PDF (1611KB)(1068)      
Three-dimensional network structure of the metal-organic frameworks(MOFs), MIL-53(Cr)as and MIL-53(Al)as, was hydrothermally synthesized by heating a mixture of 1,4-benzenedicarboxylic acid(H2BDC), water, chromium nitrate, and aluminum nitrate for three days at 220 ℃. The samples were then calcinated at 300 ℃ and 330 ℃, respectively, to obtaine MIL-53(Cr)ht and MIL-53(Al)ht. The structure, composition and hydrogen storage properties of the materials were investigated by means of X-ray diffraction (XRD), intelligent weight analyzer (IGA), scanning electron microscopy (SEM), infrared spectrometer (IR) and thermal gravimetric analysis (TG). The results show that the unique breathing effect of the metal-organic frameworks MIL-53, especially the MIL-53(Al)ht which possesses a high surface area, large pore volume and diameter, makes a beter hydrogen absorption performance.
2010, 23 (1): 39-42. DOI: 10.3696/j.issn.1006-396X.2010.01.010
Theoretical Study on Potential Energy Surface of the Singlet Promising Interstellar Molecule PSiCP
LI Fei,WANG Chan, ZHANG Feng-hua,et al
Abstract1261)      PDF (832KB)(423)      
The potential energy surface of the promising interstellar molecule PSiCP was calculated at the density functional theory and ab initio level. At the B3LYP/6-311G(d) level, eight isomers connected by ten transition states were located on the potential energy surface. At the QCISD level, three isomers cSiPCP 1,PSiCP 7 and SiCPP 8 possess considerable kinetic stability. The bonding nature and spectroscopic parameters were analyzed, which will be helpful for the future astrophysical detection and the synthesis in the laboratory.
2010, 23 (1): 43-46. DOI: 10.3696/j.issn.1006-396X.2010.01.011
A Convenient Synthesis of Acaricide Propargite
LIU Lin, XUE Shou-qing, QIAN Jian-hua, MA Cheng-xiang
Abstract2000)      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
Rheological Characterization of SBR Modified Asphalts Under Oxidation and Sulfurization
CUI Wen-feng, OU Yan-wei, JIN Yong, WANG Yun-pu
Abstract871)      PDF (465KB)(664)      
Polymer modified asphalts were prepared with SBR, XSBR,SBS under oxidation or sulfurization conditions using a special mixing technique. The low temperature properties of the binders were greatly improved, the dynamic mechanical properties of SBR-modified asphalts before and after oxidation or sulfurization were characterized at -30~100 ℃ by using dynamic shear rheometry. The results show that the addition of SBR1500 increased the binder elasticity at low temperature. And sulfurization modification is improved the complex modolus G* and elasticity property at high temperature, when G*/sinδ=1 kPa, the temperature of PMA is 10 ℃ higher  than the base asphalts after sulfurization,  also the δ became smaller than the base asphalts, their temperature susceptibility is reduced to a great extent.It indicates that the viscoelasticity of the modified binder had been improved effectively at the high temperature. And the temperature susceptibility of the vulcanized-SBR asphalts were reduced to a great extent, their properties were improved apparently from low to high temperature, their application would be developed widely in the high
temperature environment conditions.
2010, 23 (1): 50-54. DOI: 10.3696/j.issn.1006-396X.2010.01.013
Two-Dimensional Numerical Simulation of Friction Hydro Pillar Processing by Computational Fluid Dynamics
CHEN Zhong-hai, CHEN Jia-qing, JIAO Xiang-dong, et al
Abstract1601)      PDF (1416KB)(471)      
A two - dimensional axisymmetric model of friction hydro pillar processing (FHPP) was established base on
Gambit software .Using the commercial computational fluid dynamics software Fluent , the numerical simulation of plastic
metal flow pattern was carried out in steady phase of FHPP .While keeping the other parameters constantly during the process
of numerical simulation ,the velocity field and static pressure field distribution change of ideal metal plastic fluid during the
forming process were analyzed by changing only one critical parameter respectively ,such as the radial clearance between metal
stud and the base hole ,the material viscosity ,the rotary speed of metal stud ,the feed rate of metal stud and the bottom shape
of the base hole .The result show that the static pressure distribution of plastic metal is affected remarkably by the feed rate (i .
e .the axial force) and the material viscosity of metal stud ,and has little to do with the rotary speed and the radial clearance .
Although the feed rate and the radial clearance have little influence on the velocity distribution of plastic metal ,the effect of
rotary speed is relatively remarkable ,especially for the material neighboring to the wall of the velocity inlet and nearby the
metal stud .The flow condition of the plastic metal material can be improved by changing the bottom shape of the base hole ,
which can also reveal the reason why there exist some defects at the bottom of the hole .The above - mentioned research can
provide some guidance to the future experimental study adopting appropriate parametric combination ,and can also lay solid
foundation for the future numerical simulation by thermo - mechanical coupling .
2010, 23 (1): 55-59. DOI: 10.3696/j.issn.1006-396X.2010.01.014
Fluid Structure Interaction Vibration of Pipes Conveying Fluid
LI Ming, GONG Jing, LI Qing-ping,WANG Li-jia
Abstract936)      PDF (1615KB)(582)      
Based on the four - equation model describing the fluid structure interaction (FSI) in axial vibration for liquid -
filled piping system , the effects of Poisson ,friction and junction coupling on the axial response of the piping system were
studied .The method of characteristics (MOC) was described in detail and the transient response of the reservoir - pipe - valve
system to instantly valve closure was numerically simulated .The numerical analyses show that the FSI can not be ignored .The
Friction coupling is less important while the junction and Poisson coupling are more important .The common calculation models
of pressure wave speed were reviewed ,the optimization calculation model was recommended and the effects of void fraction on
the speed were analyzed ,aiming at providing a theoretical guide for further study of the FSI analysis of gas - liquid two - phase
flow pipes
2010, 23 (1): 60-65. DOI: 10.3696/j.issn.1006-396X.2010.01.015
Research on Constant-Pressure Cake Filtration Process Based on Visual Basic
NIE Xin, ZHANG Jian-wei
Abstract748)      PDF (1018KB)(499)      
With the study of the basic equation in the filtration process ,in order to reduce the workload of the filtration
experiment ,the method was provided using the computer simulation studies on the filtration process . The cake formation
process was divided into a number of hypothetical increments .A suitable constant pressure cake filtration simulation program
was designed using the time increments and VB programming language . Through the program , a number of relevant
parameters and results can be simulated .Which propose a reliable new method of the study in cake filtration process .
2010, 23 (1): 66-70. DOI: 10.3696/j.issn.1006-396X.2010.01.016
Numerical Simulation on Phase Change Heat Transfer of Ground-Source Heat Pump System in Cold Region
ZHENG Ping,WU Ming,ZHANG Guo-zhong,et al
Abstract847)      PDF (833KB)(519)      
According to heat transfer and filtration theory ,mathematical model and its control equation of ground - source
heat pump in cold climate were put forward .The in heating situation was simulated by using finite element method to ground
- source heat pump heating of the Daqing oil field in winter .By comparison with and without consideration of soil freezing ,the
results show that the phase change latent heat could reflect the heat transfer effect . The soil freezing can increase thermal
conductivity ,which is beneficial to the heating effect and pump efficiency .
2010, 23 (1): 71-74. DOI: 10.3696/j.issn.1006-396X.2010.01.017
Research on Low Flow Operation Characteristic of QinJing Pipeline Transports JiDong Crude Oil
MA Wei-ping,LI Li,HUANG Qi-yu
Abstract813)      PDF (717KB)(437)      
According to CNPC plan and low flow operation necessity of QinJing pipeline transports JiDong crude oil after 2008, the basic physical characteristic and rheological characteristic of JiDong crude oil were investigated. The best heating treatment temperature of JiDong crude oil was 60 ℃. The best benefication PPD of JiDong crude oil was selected, with pour point decreased 13.5 ℃ and viscosity decreasing rate up to 86.6 percent. The operation scheme of QinJing pipeline transports 2.8×106 t/a JiDong crude oil was also established. In allusion to the low flow operation characteristic of QinJing pipeline transports JiDong crude oil, such as heat load capability, wax deposition law, energy expenditure, optimized pigging plan and the flow transformation law of the PPD benefited oil were studied in detail. The maximum of wax deposition thckness was 50.24 mm, and optimized pigging period was 34 days in winter operation condition of QinJing pipeline transports JiDong crude oil. The research production provided safe guarantee and technology support for QinJing pipeline transports JiDong crude oil after 2008.
2010, 23 (1): 75-79. DOI: 10.3696/j.issn.1006-396X.2010.01.018
Selection of Foam Agent and Adaptability of Formation for Nitrogen Foam Displacement
YUE Yu-quan,ZHENG Zhi-chu,ZHANG Shi-min
Abstract905)           
Nitrogen foam displacement is an alternative technique for heavy oil and can enhance the oil recovery .Foam agent is
optimally selected from several ones based on foam performance by static and dynamic tests .Visual experiments are performed
to study the adaptability of formation , and it is show that oil recovery is lower in heterogeneous formation than that in
homogeneous formation .However ,under condition of residual oil ,the increment of recovery in heterogeneous formation is
larger than that in homogeneous one .The more heterogeneous the porous media is ,the higher the increment of oil recovery and
the better the efficiency of foam displacement .
2010, 23 (1): 80-85. DOI: 10.3696/j.issn.1006-396X.2010.01.019
AnImageRetrievalMethodBasedonUserRegionsofInterest
LI Li-jun
Abstract776)      PDF (298KB)(453)      
The image retrieval system based on the global characteristics couldn摧t meet the needs of users . In order to
overcome this shortcoming ,the image retrieval algorithm based on the user regions of interest was proposed .This algorithm
based on the principle of discriminant saliency ,could extract the user regions of interest effectively without segmentation .
Experimental results show this method is easily manipulated ,and has better performance than image retrieval based on global
characteristics .
2010, 23 (1): 86-88. DOI: 10.3696/j.issn.1006-396X.2010.01.020
Optimization of Modeling Nonlinear Programming for Refinery Production and Inventory Schedule
SUN Zai-guan,LI Shu-rong,YAN Wei
Abstract840)      PDF (475KB)(473)      
Considering the demand of energy consumption and inventory in refinery production schedule ,on account of a
refinery practical situation , the global model which includes four process units such as atmospheric vacuum distillation ,
catalytic cracker , solvent oil equipment and gas separation equipment were established . The objective function of the
optimization is to maximize the profits of the whole refinery . The decision variables are every output of the product . The
constraints in the optimization include mass balance , equipment processing and quality demand . The energy consumption
constraint and inventory constraint with integral form was presented .Transforming the model to nonlinear programming and
solving it by matrix least square method ,an example in the end proves the validity of this model .
2010, 23 (1): 89-92. DOI: 10.3696/j.issn.1006-396X.2010.01.021
Differential Evolution Algorithm With Control Parameter Co-Evolution and Its Application
FAN Qin-qin, YAN Xue-feng
Abstract800)      PDF (470KB)(419)      
In order to implement dynamic and self-adaptive adjustment of control parameter with population evolution, a novel differential evolution algorithm with control parameter co-evolution (DE-CPCE) was proposed. In DE-CPCE, control parameter were designed as the symbiotic individual of original individual, and each original individual had its own symbiotic individual. Differential evolution operator was applied to search the global optimization solution of problem; meanwhile, it was also employed to co-evolve the population consisting of symbiotic individuals according to the evolution efficiencies of original individuals. Thus, with the evolution of the population consisting of original individuals in DE-CPCE, control parameter were dynamically and self-adaptively adjusted and the real-time optimum control parameter were obtained. The results of the experiments show that control parameter of DE-CPCE have dynamic and self-adaptive property; the probability and precision of obtaining the global optimization solution, and the convergence are all better than those of DE/rand/1, DE/best/1, DE/rand-to-best/1, DE/rand/2, DE/best/2, self-adaptive Pareto DE and self-adaptive DE. Further, DE-CPCE is applied to estimate the kinetic model parameter of   oxidation, and the result is better than that of the reference.
2010, 23 (1): 93-98. DOI: 10.3696/j.issn.1006-396X.2010.01.022
Compatibilization andStrengthen of PBT/PP Blends by Adding Liquid Crystalline Polymer With Carboxylic Group
XU Xin-yu
Abstract657)      PDF (1220KB)(526)      
A liquid crystalline ionomer (LCP) was synthesized by using of an interfacial condensation reaction from 4-phenylene-dicarbonic acid bis (4-carboxyl phenyl) ester, 1, 10-sebacoyl dihydroxy, 1, 12-dodecanedioyl dihydroxy and 2, 5-dihydroxybenzoic acid. The LCP has been blended with PBT and PP. The thermal behavior, morphological structure, and mechanical properties of the blends were investigated by differential scanning calorimetry (DSC), scanning electron microscopy (SEM), and tensile measurement. DSC and SEM results indicate that the LCP interacts with both the dispersed (PP) phase and the matrix (PBT) phase by acting as compatibilizer at the interface. The compatibilizer brings about good adhesion at the interfacial, which reduces the disperse phase size and enables a finely PP phase at matrix. The mechanical properties of the ternary blends are improved when a proper amount of LCP is added. However, when the content of LCP being added to the blends is surplus,the mechanical performances of blends are decreasing. 
2010, 23 (2): 1-4.
TiO2 Self-Cleaning Films Prepared by Flame Spraypyrolysi
WU Guang-ming,YANG Lan,XING Guang-jian,et al
Abstract617)      PDF (1160KB)(625)      
TiO 2 self-cleaning films were prepared on the glass substrates by the self-made flame spray pyrolysis equipment with Ti(C 4H 9O )4 as precursor. The morphology, structure, light transmittance of the films were characterized respectively by scanning electron microscopy (SEM), X-ray diffraction (XRD), and ultraviolet-visible transmission spectrum (UV-Vis). And the photocatalysis and hydrophilicity of the films were investigated. The results show that the droplets formed liquid membranes first, and then became the solid films by thermal decomposition reaction. The films synthesized by the flame spray pyrolysis method are anatase titanium dioxide. And the influence of growth time and annealing temperature on the crystallinity,photocatalysis and self-cleaning properties of the films were discussed. The longer position time and the higher annealing temperature, the higher of the crystallinity, photocatalytic activity and hydrophilicity of the films. The light transmittance of the films annealing at 600 ℃,which were synthesized by flame spray pyrolysis method at 400 ℃, reach to over 70%. 
2010, 23 (2): 5-8.
Composition and Interfacial Activities of Regular and Hydrophobic Petroleum Sulfonates
WANG Shuai,WANG Xu-sheng,CAO Xu-long,et al
Abstract690)      PDF (1036KB)(593)      
Regular and hydrophobic petroleum sulfonates were extracted and purified from the crude samples of petroleum sulfonates used in shengli oilfield by liquid-liquid extraction method. Analysis of these substances using liquid chromatography, mass spectrometry and determination of hydrophile-lipophile balance values were completed. Meanwhile, interfacial tension values of oil/water system respectively consisted of regular and hydrophobic sulfonates were measured by rotated dropping method. The results show that hydrophobic sulfoantes are different from regular sulfonates in composition, and it mainly consists of mono sulfonates, while the contents of mono and disulfoantes in regular sulfonates are similar. Meanwhile its interfacial activity is much lower than that of regular sulfonates, and it can not obtain ultralow interfacial tension values, not only for unit but also for mixed systems. While mixed systems of regular sulfoantes can decrease interfacial tension values to 10 -4 mN/m. Besides, the relationship between the structure of petroleum sulfonates and their interfacial activities was discussed.
2010, 23 (2): 9-12.
Preparation of Alumina Nanoparticles Carrier and Research on Pore Properties
LIU Yan,SHANG Li-yan,LI Yan,ZHAI Yu-chun
Abstract587)      PDF (443KB)(530)      
Alumina nanoparticles carrier was prepared by supersolubilizing self-assembly micelles. BET and mercury injection method were used to characterize the carrier and the influence of adhesive amount and template amount on pore character of nanometer alumina was researched. The results indicate that, when the amount of adhesive increased, surface area and bulk density increased, pore volume and pore size decreased. When the amount of template increased, pore volume and pore size increased, bulk density decreased. When template amount is greater 10 than benchmark, the surface area is 411.4 m 2/g, surface area achieved maximum,less or more then this value, surface area would decrease.
2010, 23 (2): 13-15.
The Kinetics Study of the Esterification on the Carbon-Based Solid Acid Catalys
LENG Dong-mei,SHI Cai-jing,ZHOU Chang-xing,et al
Abstract682)      PDF (823KB)(410)      
Novel solid acid catalysts for esterification have been described that were made by incomplete carbonization of expanded starch and dodecylbenzene sulfonic acid. The effects of the molar ratio of alcohol to oleic acid, the mass ration of catalyst to oleic acid,reaction temperatures and reaction time were discussed. The kinetics of esterification of oleic acid with ethanol in the liquid phase catalyzed by carbon-based solid acid was studied under atmospheric pressure. The results of XRD and acid-base titration indicate the incompletely carbonization of the mixtures of expanded starch and p-toluene sulfonic acid results in amorphous carbon consisting of small polycyclic aromatic carbon sheets with high density of —SO 3H groups. The remarkable catalytic activity of this material is attributable to the incorporation of reactants into the bulk structure and the high density of strongly acidic —SO 3H sites. The experimental results show that the conversion of oleic acid is 83.88% by following conditions:molar ratio of ethanol to oleic acid is 8∶1,catalyst mass 1.0 g, refluxe reaction time 6.0 h.It was also found that the reaction depended on temperature. The conversion of oleic acid was found to increase with the temperature increasing from 50 ℃ to 70 ℃. The experimental data were correlated with a first-order pseudohomogeneous kinetic model. The activation energy and pre-exponential factor of this reaction are calculated to be 35.78 kJ/mol and 5.70×10 4  h -1, respectively. 
2010, 23 (2): 16-20.
Adsorption and Desorption of Thiophene Vapour on NiY
LIU Dao-sheng, SONG Li-juan, JU Xiu-fang,et al
Abstract648)      PDF (1073KB)(435)      
The curves of FT-IR, adsorption isotherms and TPD were carried out by FT-IR and IGA(intelligent gravimetric analyzer). The spectrum of FT-IR shows that there is only physical adsoption exsits for thiophene on NaY because of no new peaks appeared in the FT-IR curves, but both physical and chemical adsoption exsit on NiY due to the peaks of 1 391 cm -1 and 1 440 cm -1 in the curves which attributable to π complexation and S-M interaction. The adsorption isotherms confirm that the adsorption quantity of thiophene on NaY decreases with temperaure increasing which consistent with the physical adsorption; but the other is different, the adsotion quantity of thiophene at 302 K and 335 K is equivalent and decreases at 373 K which indicated that the different interaction model between adsorbent and adsorbate on NiY. The spectrum of TPD shows that there are two kinds of active site existting on NiY surface for thiophene, which responsible for the different chemical interation. 
 
2010, 23 (2): 21-24.
Research on Profile Control and Water Shut-off Performance of Pre-Crosslinked Gel Particles and Matching Relationship Between Particle and Pore Size
LI Dong-xu, HOU Ji-rui, ZHAO Feng-lan, et al
Abstract659)      PDF (791KB)(524)      
Experiments on injectivity and profile control performance of pre-crosslinked gel particles widely used in oilfields were done. The results show that the injectivity of pre-crosslinked gel particle is poor. Most of particles pile up in the front of sand pack, and the migration distance of pre-crosslinked gel particles is less than 20 cm, which lead to the formation of filter cake and the poor effects of depth profile control. The injection of pre-crosslinked gel particle is selectivity. In the early stage of profile control, the diversion rate of low permeability layer increases slightly, and the effect is less than 2%. After long-term waterflooding, due to the easily breakthrough in higher permeability layers, the diversion rate of low permeability layer declines in comparison that before the operation. It is indicated that pre-crosslinked gel particles will harm low permeability layers. It is calculated and analyzed that the diameters of current pre-crosslinked gel particles are bigger than pore size. Theoretically, current pre-crosslinked gel particles are difficult to be applied in depth profile control.
2010, 23 (2): 25-28.
Influence of Preformed Particle Gel on Oil-Water Interfacial Properties and Emulsion Stability
LIN Mei-qin, TIAN Dan, LIN Yun, WANG Hao, LI Ming-yuan
Abstract649)      PDF (703KB)(524)      
Interfacial properties between Shengli Gudong model oil and preformed particle gel solution were investigated with interfacial tensiometer, interfacial viscoelastometer and Zeta potential instrument. Meanwhile, the effects of the concentration of preformed particle gel solution on interfacial properties and emulsion stability were researched. The results indicate that the interfacial tension, the interfacial shear viscosity and the absolute value of Zeta potential between deionized water/formation water and model oil increase with addition of preformed particle gel. The stability of water-in-oil and oil-in-water emulsion formed by crude oil and preformed particle gel solution enhances as the concentration of the preformed particle gel solution increases.
2010, 23 (2): 29-33.
Technology Study on SiO2 Inorganic Membranes Prepared by Sol-Gel Method
LI Xiao-xia, JIANG Yun-bo, ZHANG Ke-zheng
Abstract685)      PDF (577KB)(520)      
SiO 2 inorganic membranes were prepared on Al 2O 3 wafer substrates by Sol-Gel method using TEOS as raw material,alcohol as solvent,hydrochloric acid as catalyst and N,N-dimethylform amide as template.The effect of coating method,alcohol-silicon molar ratio of sol and retention time on performance of the sol were systematically analyzed. The results show that using combination of concentrated-dilute coating method can improve coating efficiency and performance of the membranes. Though larger alcohol-silicon molar ratio can get better membranes,the cycle of membranes preparation is longer. Retention time of the sol is too long, so that performance of the membranes will decrease.
2010, 23 (2): 34-36.
Preparation and Performance Study of Epoxy Resin E-51 Modified Waterborne Polyurethane Adhesive
LI Hui
Abstract613)      PDF (558KB)(558)      
Catalyzed by dibutyl tin dilaurate, a polyether type of epoxy resin E-51 modified waterborne polyurethane adhesive emulsion was prepared using 1,4-butanediol as the small molecule chain extender, dimethylol propionic acid as ahydrophilie chain extender, trimethylolpropane as the crosslinking agent. The performance of modified waterborne polyurethane adhesive emulsion is optimum when the amount of dimethylol propionic acid was 10%, the content of trimethylolpropane and epoxy resin E-51 were 3% and 4%, respectively. E-51 modified waterborne polyurethane adhesive is provided with good water resistance and high tensile strength.
2010, 23 (2): 37-39.
Sol Size Changes During Pseudo-Boehmite Peptization Reactivity
ZHANG Jin-feng, LIU Yu-jian, TIAN Hui-ping
Abstract641)      PDF (757KB)(568)      
The change rule of sol size during the pseudo-boehmite peptization were explored by using experimental apparatus such as Zetasizer Nano ZS 90 , TURBISCAN Lab infrared dispersion steady indicator and TEM.The results show that the optimal range of [H+]/[AlOOH] molar ratio is 0.15 to 0.30, the sol size is about 77 nm. In the three kinds of pseudo-boehmite sol size measurement method, the smallest sol size measured by TEM, followed by the two others.Increase the [H+]/[AlOOH] molar ratio and peptization temperature are both in favor of peptization reactivity.
2010, 23 (2): 40-42.
Gas Channeling and Migration of CO2 in the Non-Homogeneous Porous Media
LIN Yang, LIU Yang, HU Xue, et al
Abstract552)      PDF (627KB)(517)      
Based on some indoor physical simulation and the corresponding experimental equipments, to the channeling laws of CO 2 in the absence of filling phase and filling phase porous medium was researched. It specifically researched the impact that the factors have on CO 2 channeling level, such as temperature, pressure, permeability, high permeability and low permeability hierarchy. The results show that it reveals exponential relationship between the injection pressure and the breakthrough time of gas in porous media, and there is an empirical correlation can predict the gas channeling time, the differential permeability of hypertonic layer and low permeability layer has a great influence to the time of gas channeling and the flow rate of gas in the context of a certain critical pressure. The empirical regression equation can predict the swept volume of gas prior to the gas channeling under a certain differential.
2010, 23 (2): 43-46.
Determination of the Reaction Product of Catalytic Hydrogenation of Nitrobenzene by High Performance Liquid Chromatography
SONG Wei, ZHANG Xiao-tong, ZHANG Fan, et al
Abstract691)      PDF (217KB)(568)      
The reaction product of catalytic hydrogenation of nitrobenzene was determined by high performance liquid chromatography and UV detection. The reaction solution of catalytic hydrogenation of nitrobenzene was filtered by the microporous filter membrane(water system) which was 0.45 μm, and then the samples diluted with methanol were injected. The qualitative analysis of the experiment was used retention qualitative method comparing directly with the known standard material, the quantitative analysis was used external standard method. The linear regression equations of nitrobenzene, aniline and p-aminophenol are obtained from experiments, and the correlation coefficients are 0.998 6, 0.999 8 and 0.999 9, the detection limit is 2.0,20.0 mg/L and 21.0 mg/L, the coefficient of recoveries of them are 97.6%, 97.5% and 98.1%, the precisions expressed in relative standard deviation are 0.62, 0.77 and 0.36 respectively. This method is quick, accurate and simple and does not require sample pretreatment, experimental results are satisfactory comparatively.
 
2010, 23 (2): 47-49.
New Denitrogenation Method From Shale Oil
LI Guang-xin, HAN Dong-yun, CAO Zu-bin, et al
Abstract644)      PDF (442KB)(376)      
Removal of nitrogen compounds especially basic nitrogen compounds from Fushun shale oil with acidic reagent as extraction reagent and lye as back-extraction reagent was investigated. The results show that removal rate of basic nitrogen compounds increased with the increasing mass ratio of agent to oil, reaction temperature, reaction time and settling time respectively, at the same time the quality of shale oil is improved in a way. When mass ratio of agent to oil ratio was 1∶1, reaction temperature was 60 ℃, reaction time was 20 min and settling time was 4 h with acidic reagent A, removal rate of basic nitrogen compounds is up to 96.04%, and that of total nitrogen compounds is up to 38.25%, the yield of shale oil is 97.18%.
2010, 23 (2): 50-52.
Investigation on the Separation Characteristics of W/O Emulsion in the Cylinder-Electrode Coalescer
Lv Yu-ling, HE Li-min, LUO Xiao-ming, HE Zhao-yang
Abstract598)      PDF (1440KB)(437)      
A new type of cylinder-electrode electrostatic coalescer with insulation was designed and developed. When the W/O emulsion flowed through the electrodes, under the applied electrical field, the tiny water droplets coalesced into bigger droplets and then settled out to separate. With the laboratory experiments, W/O emulsion separation characteristics was investigated. The relationship among the electrode diameter and length, electrical field intensity and water cut was investigated. Also the influence of these parameters was analyzed. It is shown that, without the electrodispersion happening, the coalescer separation efficiency of water-in-oil emulsion increases as the electric field intensity increases. Also the separation efficiency is influenced by the affecting time of electric field and the electrostatic force between the droplets in the water-in-oil emulsion. When the water content is low, the influence of electric field affecting time plays an important role and it’s proved that the longer the electric field affecting time, the higher the separation efficiency. Under the condition of high water content, the influence of electric field affecting time decreases. When the electrostatic force between the droplets in the water-in-oil emulsion increases, the separation efficiency also turns higher. The high-speed camera was used to observe and record the droplets’ size from the coalescer exit. It’s estimated that the droplets’ size increased dramatically. Accordingly, the new cylinder-electrode electrostatic coalescer showed high efficiency in the separation of diesel oil/water emulsion.
2010, 23 (2): 53-57.
Preparation and Study in Wastewater COD Removed of Polymerization of Mg-Al Flocculants
HAN Chun-yu, HAN Chun-fang, LIU Chun-sheng, et al
Abstract607)      PDF (489KB)(427)      
Two kinds of polymerization Mg-Al flocculants were synthesized under normal atmospheric temperature with slow-addition method, which is used on the laboratory wastewater COD removal examination. The results show that the COD removal is effected by flocculants kind, flocculants dose, pH, stirring time and settling time. Over 98% of COD is removed by polymerization sulfuric Mg-Al flocculants(PMAS) at pH=8, 3 minutes rapid agitation and 10 minutes slowly, 30 minutes settling time, 20 mL flocculants dosage in 1 L wastewater.
2010, 23 (2): 58-60.
Research on the Preparation and Performance of Chitosan Membrane
JIANG Zhen-ju,SUN Zhong,WANG Zhou-yu
Abstract678)      PDF (168KB)(508)      
The chitosan membrane and crosslineked were prepared by doctor-blade casting process with chitosan. The chitosan solution concentration as well as temperature capacity of glutaraldehyde crosslinked chitosan membranes have been studied. The best experimental conditions of cross-linking of chitosan film have been obtained as follows: the concentration of chitosan solution is 1%, cross linking temperature would be exceeded 70 ℃,  cross linking time must be exceeded 1 h, and to obtain the better film, the dry way would be the nature air dries or drying on the 80 ℃. The results show that chitosan membrane has the highest intensity of 9.92 MPa, the maximum ratio of  resistant elongation is 11.75%, and the film has not the acid resistance. Though the cross-linked chitosan with glutaric the highest intensity of  dialdehyde can achieve the value 96.64 MPa, the maximum ratio of  resistant elongation is 10.92%. The acid resistance of film has been enhanced greatly.
 
2010, 23 (2): 61-63.
Palladium-Catalyzed Efficient Synthesis of 1,3-Diformylazulene Derivatives
XING Jin-juan, WANG Dao-lin, LIN Li-nan, et al
Abstract716)      PDF (395KB)(427)      
1,3-diformylazulene was synthesized by 1,3-dibromoazulenes, organic base and catalyst under 6×10 6 Pa at 120 ℃ with carbon monoxide-hydrogen for the formylation reagent, while palladium(Ⅱ) was as the catalyst,benzene as solvent. The yield was 77% under the condition the molar ratio of 1,3-dibromoazulenes,organic base and catalyst was 1∶2∶0.02. Based on the reaction, by changing the substituent, 1,3 - dimethylacyl-5-methyl azulene, 1,3-dimethylacyl-6-tert-butyl-azulene, 1,3-diformy-2,4,6-trimethyl-azulene were synthesized by acylation reactions, the yields were 68%, 60%, 65%. This method provides several advantages such as good yields, simple work-up procedures and mild conditions. All the products are confirmed by 1H-NMR, IR spectra and elemental analysis.
2010, 23 (2): 64-66.
The Qualitative Optimization Design of the Main Structure of Flue Gas Desulfurization Tower
CHEN Xiao-gang, ZHANG Hong-lin, LI Chang-bo
Abstract679)      PDF (1000KB)(685)      
By the research of the flue main structure of gas desulfurization tower and combining experience in engineering design, the definite steps to determine the size of desulfurization towers main structure were given. The mass transfer units number and height of the spray tower were calculated to determine the absorption height particularly, and the major factors which impacted the desulfurization efficiency were discussed. The result show that the velocity of the tower flue gas distributed evenly and the effective transfer mass area of gas-liquid contacting which impacted the mass transfer efficiency is increased, by adjusting flue gas inlet and outlet angle, using computer software to simulate the absorber tower, increasing the air distribution plate to improve the spray effectiveness and so on. 
2010, 23 (2): 67-71.
Analysis Method of Acceptable Safety Degree on Polyethylene Dust Conveying System
LIU Yi, ZHAO Dong-feng, LU Shuai, et al
Abstract619)      PDF (582KB)(457)      
The hazard of polyethylene dust during conveying process was analyzed in different aspects. Based on the necessary conditions of polyethylene dust explosion, the analysis method of acceptable safety degree during the process of polyethylene dust conveying was put forward. The method consists of five steps, which is concentration test of hydrocarbon gas, minimum ignition energy test of the polyethylene dust, minimum ignition energy calculation of the hybrid combustible gas and polyethylene dust, comparing the minimum ignition energy of the hybrid and electrostatic discharge and effectiveness assessment on existing safety measures. The method can be also used to assess the hazard of other poly-olefin dust, determine its hazard extent and provide some effective countermeasures, which can solve the poly-olefin dust explosion problem that puzzles the petrochemical industry for many years.
2010, 23 (2): 72-75.
Numerical Simulation of Laminar Forced Convection Through a Passage With Trapezoid Cross Section and Three Walls Heated
WU Shuang-ying, LIU Yu-hong, LI You-rong, LI Long-jian
Abstract594)      PDF (1720KB)(492)      
A numerical method for simulating three-dimensional laminar forced convective heat transfer in a horizontal passage with trapezoid cross section under uniform heat flux condition was presented. The results presented cover structure parameter b/a range of 1/4~4/3, and included angle of bottom side θ range of 60°, 75° and 85°. The developments and distributions of heat transfer and flow fields, and the average Nusselt numbers at different axial cross-sections in the horizontal passage with trapezoid cross section were discussed when three walls of passage were heated and bottom wall was insulated. In addition, the results were compared with those of four walls heated. The results show that the temperature distribution, convection heat transfer performance and the effects of structure parameters for a passage with trapezoid cross section and three walls heated are different from those with four walls heated. 
2010, 23 (2): 76-79.
The Effects of Magnetic Field on Microstructure, Molten Temperature and Corrosion of Sn-9Zn Solder
WU Min
Abstract640)      PDF (751KB)(421)      
Effects on microstructure, molten temperature and corrosion of Sn-9Zn solder alloy was researched under magnetic field of 0.5 T by means of XRD,SEM and metal corrosion detecter etc. The results show that magnetic field can refine microstructure of Sn-9Zn solder alloy, molten temperature decrease by 2 ℃ and corrosion improve as well. It can be concluded that the magnetic field can promote Sn-9Zn solder to crystalize at special plane and restrict formation of  rich-Zn phase,which refine microstructure of Sn-9Zn solder and improve its property.
 
2010, 23 (2): 80-83.
Research on the Singularity of Parallel Machine Tools
WANG Chuan-qiang, ZHAO Heng-hua
Abstract657)      PDF (567KB)(403)      
The singularity of parallel machine tools was researched, which was based on the research objects of the speed matrix determinant, Jacobian matrix determinant det([WTHX]J[WTBZ]) and operability W respectively. The researches provided a basis for the design of the structural parameters about parallel machine tools.The singularity of bodies about parallel machine tools can be divided into three categories when the speed matrix determinant was put as the research object. Parallel machine tools can be judged at the singularity when det([WTHX]J[WTBZ])=0 or the operability was zero.The singularity was researched for a new type of 3-legged 3-DOF parallel machine tool when det([WTHX]J[WTBZ]) and the operability W were [KG*4]put as the research objects. The mathematical model of the [KG*4]machine [KG*4]tool [KG*4]was [KG*4]established. The [KG*4]Jacobian [KG*4]matrix [KG*4]of [KG*4]the [KG*4]machine [KG*4]tool [KG*4]were [KG*4]derived. [KG*4]The [KG*4]expressions [KG*4]of [KG*4]|det([WTHX]J[WTBZ])| and the operability W about the machine tool by Matlab had been worked out. |det([WTHX]J[WTBZ])|=W>0 and |det([WTHX]J[WTBZ])|=W≠∞ were obtained by the analysis. That is, there is no singularity about the machine tool. Besides, the machine tool has good operability. The stationarity of the machine tool was researched in the environment of Matlab. The simulation results show that the machine tool has good stationarity.
2010, 23 (2): 84-88.
Algorithm of Constrained Generalized Predictive Control Based on PSO-SA
FU Qiu-feng, XIAO Jun, LI Shu-chen, ZHANG Yong-qiang,et al
Abstract682)      PDF (874KB)(493)      
An algorithm of constrained generalized predictive control was proposed based on partical swarm optimization(PSO) and simulated annealing(SA).PSO and SA were used for iterrative optimization to enhance the search capabilities for constraint boundary. Meanwhile, a violation function was constructed by constraints. This function and fitness function  determined the optimal solution better or not. Constraint handling performance of GPC can be effectively improved by this algorithm. Its feasibility and efectiveness are verified via simulation study for an industrial object.
2010, 23 (2): 89-92.
Fault Diagnosis Expert System of FCCU Fractionating System
MENG Shuai,HOU Li-gang,Lv Pin-chao
Abstract666)      PDF (272KB)(554)      
Because the relationship of faults and their expressions in FCCU system is a fuzzy one.The fault diagnosis model was based on the the relationship between FCCU fractionating system malfunction characteristics and malfunction symptoms. This model takes into account the influence of the acquirable symptoms and introduced symptom confidence and rule confidence. The expert knowledge of identifying the fault of FCCU was reviewed. In order to reduce the developing period of fault diagnosis expert system and increase its developing flexibility this paper had discussed a method by using of developing Visual C++ and expert system tool CLIPS the fault diagnosis expert system of FCCU fractionating system. This method has good transplant ability and can develop effective expert system frame in a short time.
2010, 23 (2): 93-96.
Functionalized SBA - 15 Materials as Carriers for Adsorption and Controlled Drug Delivery
SUN Li-na, ZHANG Xiao-tong, CHEN Lei,et al
Abstract889)      PDF (1220KB)(645)      
Mesoporous SBA-15 materials were functionalized with amine groups through postsynthesis, and resulting functionalized material was investigated as matrix for controlled drug delivery. The structure, composition and framework of the material were investigated by means of X-ray diffraction (XRD), intelligent weight analyzer (IGA), transmission scanning electron microscopy (TEM), infrared spectrometer (IR), and molecular simulation software. Ibuprofen (IBU) was selected as model drug and loaded onto the unmodified and functionalized SBA-15. It was revealed that the adsorption capacities and release behaviors of this model drug were highly dependent on the surface properties of SBA-15 materials. The release rate of IBU from SBA-15 functionalized by postsynthesis is found to be effectively controlled as compared to that from pure SBA-15 due to the ionic interaction between carboxyl groups in IBU and amine groups on the surface of SBA-15.
2010, 23 (3): 1-5. DOI: 10.3696/j.issn.1006-396X.2010.03.001
The Relationship Between Colloidal Stability of Atmospheric Reidues or Vacuum Residues and the Characteristics of Fractions
ZHANG Long-li, YANG Guo-hua, QUE Guo-he, et al
Abstract971)      PDF (179KB)(639)      
The colloidal stability of several residues, including Da-gang (DG), Middle East (ME), Ta-he (TH) atmospheric residues, and the corresponding vacuum residues, were measured by the mass fraction normalized conductivity. In addtion, the polar or compositional characterization of fractions of samples was performed to elucidate their effect on colloidal stability. The colloidal stability paramters of samples were from 1.45 to 8.20.   The mean molecular weight and the mean dipole moments of fractions were measured. The results show that fraction composition and the characteristics of them determined the colloidal stability of samples together and can be expressed by a formula. When the difference between dipole moment values of resins and asphaltenes is less, and the content ratio of resins to asphaltenes is bigger, the residue will be more stable. So do the heavy aromatics and asphaltenes. The ratio of saturates and light aromatics to asphaltenes is larger, the difference of polarity is larger, the sample will be more unstable.    
2010, 23 (3): 6-10. DOI: 10.3696/j.issn.1006-396X.2010.03.002
Research on the Electrostatic Coalescing Demulsification of Water-in-Oil Emulsions in Rectangular Flow Channel
DING Yi, CHEN Jia-qing, SHANG Chao, ZHANG Bao-sheng
Abstract1650)      PDF (1383KB)(422)      
The study of de - emulsification mechanism for water - in - oil emulsions by electrostatic coalescence in rectangular flow channel was the basis and prerequisite of developing vessel internal electrostatic coalescer.The influence factors of electric field intensity with insulating coating in rectangular flow channel and coalescence mechanism of dispersed droplets under homogeneous alternating current electric field were analyzed .Then the continuous-flow electro-coalescence experimental apparatus with rectangular flow channel was designed .Based on this apparatus ,the effects of electric field intensity,pulsed
frequency ,pulse width ratio ,flow velocity to the electrostatic coalescing characteristics of dispersed droplets were studied by applying rectangular - wave high-voltag and high-frequency pulsed alternating current with water- in -oil emulsions.The experimental results show that electric field intensity and flow velocity play an important role in electrostatic coalescing process of dispersed droplets,and have an optimal operating condition.
2010, 23 (3): 11-16. DOI: 10.3696/j.issn.1006-396X.2010.03.003