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Volumetric Mass Transfer Coefficients in 130 L Helical⁃Flow Airlift Loop Reactor
Gao Meiyi, Guo Qiuli, Liu Yongmin, Zhao Dezhi
Abstract
(
455
)
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(2370KB)(
177
)
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For air⁃water⁃air⁃water⁃water⁃anion exchange resin system, the effects of solid loading, particle size, separator and different guide tube forms on mass transfer coefficients were studied in an airlift cyclone reactor (HALR) with a volume of 130 L (inner diameter 290 mm and height 2 000 mm) and an apparent gas velocity of 0~0.84 cm/s. The results showed that the volumetric mass transfer coefficients of the three phases system were larger than the two phases. As the particle size increased, the volumetric mass transfer coefficients decreased. The volumetric mass transfer coefficients with the solid separator was a little bigger than the none of separator.The volumetric mass transfer coefficient of the finned draft tube was the largest when the superficial gas velocity was small.
2018, 31 (6): 24-27.
DOI:
10.3969/j.issn.1006-396X.2018.06.004
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Effect of Reaction Conditions on Hydrocracking Reaction of Slurry Bed
Song Guanlong,Zhao Dezhi,Wu Qing,et al
Abstract
(
819
)
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(2086KB)(
435
)
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The slurry bed hydrogenation was studied using vacuum residue from CNOOC Huizhou Refining & Chemical as raw material. The effects of reaction temperature, hydrogen partial pressure, catalyst mass fraction and airspeed on the conversion rate and the yield of each product were investigated in slurry bed hydrocracking reactor of independent research and development. The results showed that under the optimal reaction conditions of reaction temperature 460 ℃, hydrogen partial pressure 14 MPa, hydrogen oil volume ratio 1 000∶1, catalyst mass fraction 300 μg/g and space velocity 1.0 h
-1
, the residue conversion rate was 90.50%, The coke rate was 5.01%. At the same time, the reaction mechanism and the coking mechanism of the hydrogenation reaction of the suspended sediment were analyzed, which provided theoretical guidance and technical support for the industrialization of the hydrocracking technology.
2017, 30 (5): 17-21.
DOI:
10.3969/j.issn.1006-396X.2017.05.004
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Preparation and Hydrodesulfurization Performance of New Kind of Diesel Oil Hydrogenation Catalyst
Zhang Zhiwei, Ding Wei, Zhao Dezhi, Song Guanlong, Zhang Qiang
Abstract
(
640
)
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(2683KB)(
469
)
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The nanometer autonomous vehicle assembly MoNiP hydrogenation catalysts were prepared by homogeneous precipitation using thiourea as precipitant matrix and citric acid as complexing agen. The catalysts were characterized by BET, NH3TPD, FTIR spectra of CO adsorbed and XPS. The results of BET and FTIR spectra of CO showed that when the content of thiourea was 40%, catalytic performance of the catalyst was best. The homogeneous precipitation catalyst achieved the desulfurization rate of 95.3% which was higher than the reference catalyst by 1.7%.
2016, 29 (4): 7-12.
DOI:
10.3969/j.issn.1006-396X.2016.04.002
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Synthesis of a New Diesel Pour Point Depressant
Liu Mei, Lin Zeye, Wang Nannan,Zhao Dezhi
Abstract
(
675
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(1602KB)(
416
)
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A new diesel pour point depressant (PPD) was synthesized using αmethacrylic acid ester, maleic anhydride, and styrene as raw materials.The results showed that the optimum reaction conditions were as follows: the mass fraction of azodiisobutyronitrile (AIBN) was 0.8%, the mole ratio of αmethacrylic acid ester, maleic anhydride and styrene was 6∶1∶1, the reaction temperature was 80 ℃, and the reaction time was 8 h. Meanwhile, the effect of depressants was best when its mass fraction was 0.1%. At the same time, A, B, and C surface active agent were added into PPD according to the different proportion, respectively. It was found diesel pour point was decreased by 17 ℃ when PPD and B surfactant was compounded with mass ratio of 4∶1.
2015, 28 (6): 25-28.
DOI:
10.3969/j.issn.1006-396X.2015.06.005
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Optimization of the Synthesis of 5(Acridin9yl) Pentanoic Acid Catalyzed by Acid Catalysts
Gong Zhe, Wang Dehui, Song Guanlong, Zhao Dezhi
Abstract
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422
)
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(1698KB)(
318
)
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5(acridin9yl)pentanoic acid was prepared using Nphenylaniline and adipic acid as raw materials by cyclization reaction. Lewis acid and Bronsted acid were chosen as catalysts under the condition of solventfree. The effect of sort of catalysts, reaction time, reaction temperature, the amount of catalysts and the mole ratio of reactants on the yields of final products were investigated. The results showed that the yeild of 5(acridin9yl) pentanoic acid can reach 82.6% under the following experimental conditions:HF with high catalytic activity, the reaction time 6 h, the reaction temperature 60 ℃, 3 times molar ratio of the amount of catalyst to substrate, molar ratio of Nphenylaniline to adipic 1∶3. NMR, MS and elemental analysis were used to characterize the product of 5(acridin9yl) pentanoic acid. The temperature of reaction with HF catalyst was low. The product can be easily seperated and purified with high purity.
2014, 27 (6): 20-23.
DOI:
10.3969/j.issn.1006-396X.2014.06.005
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Preparation and Hydrotreating Desulfurization Properties of BoronModified TiO
2
Nanotube Array MoNiP Catalyst
Yang Xue, Wang Dehui, Song Guanlong, Zhao Dezhi
Abstract
(
597
)
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(1896KB)(
417
)
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The nanotube array with big specific surfacearea and aperture was prepared by the anodic oxidation. Bmodified MoNiP hydrotreating catalyst with pore diameter of 72.3 nm and specific surface area of 156 m2/g was prepared by the impregnation method,and characterized by mercury intrusion method and XRD. The activity of the novel catalyst was evaluated in a fixed bed reactor using diesel oil of Gudao island as the raw material. The results showed that the desulfurization rates of the products reached 96.6% under the optimum hydrogenation condition as follows: temperature 360 ℃,pressure 7 MPa,volume ratio of hydrogen to oil 600∶1 and space velocity 1.5 h-1.
2014, 27 (5): 39-42.
DOI:
10.3969/j.issn.1006-396X.2014.05.009
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The Application of SelfAssembly Catalyst in Hydrorefining Performance for Mixed Oil
Tian Ye,Zhao Dezhi,Wang Dingcong,et al
Abstract
(
526
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443
)
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Cycle stock and inferior catalytic cracking diesel oil with volume ratio 2∶1 were used as crude oil, which was refined by a new type of nano selfassembly catalyst. Orthogonal test was designed to investigate the influence of temperature, space velocity and pressure on HDS,HDN and HDAr. The most significant influence factor on HDS,HDN and HDAr was obtained. Through the representation of BET, it is concluded that multilayer dispersion of nanoparticles on the surface of the catalyst FA1204 was uniformwith average pore diameter 7.7 nm, pore volume 0.26 cm3/g, and specific surface area 132.7 m2/g2 respectively. The results proved that the anti coking performance of FA1204 was better than industrial catalyst F2. The liveness and resistance ability of carbonization of catalyst FA1204 in harsh conditions were compared with industrial catalyst F2 and nano selfassembly catalyst FA2012. The results showed that HDS,HDN,HDAr of the catalyst FA1204 was superior to industial catalyst, the percent conversion of HDS,HDN and HDAr of FA1204 were 66%,34% and 74% respectively, and the percent conversion of HDS,HDN and HDAr of F2 were 40%,24% and 25%,respectively. Therefore, the resistance of coking properties of catalyst FA1204 was superior to catalyst F2. In addition, catalyst FA1204 has a processing capacity of HDAr.
2014, 27 (2): 15-20.
DOI:
10.3969/j.issn.1006-396X.2014.02.004
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Preparation of Nano SelfAssembly Macroporous Catalyst and Its Hydrogenation Performance for FCC Diesel Oil
Li Siyang,Zhao Dezhi,Wang Dingcong,et al
Abstract
(
512
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466
)
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Adopting secondary nano selfassembly method to prepare macroporous catalyst(0106,1227)with small stacking density and high metal loading, the distribution of pore volume centralized from 30 nm to 100 nm,which accounts for 11%,28%. The first activity of two kinds of nano selfassembly catalyst(0106,1227) was investigated with Zhenhai FCC diesel oil as feed at reaction temperatures of 360 ℃,reaction pressure of 7 MPa,hydrogenoil volume ratio of 600,volume space velocity oh 1.5 h-1 in a fixed bed micro reactor of 10 mL,and with reference agent as a contrast. The experimental results show that the two kinds of nano selfassembly catalyst (0106,1227)has higher activity of hydrodesulfurization,hydrodenitrificationand aromatics saturation than the reference catalyst.The sulfur mass fraction of FCC diesel [KG*4]oil[KG*4] feedstock [KG*4]could [KG*4]be [KG*4]reduced from 12 400 μg/g to 483,283 μg/g which the highest desulfurization rate of 96.10% and 9771%;the nitrogen mass fraction of FCC diesel oil feedstock could be reduced from 1 507 μg/g to 35.7,14 μg/g which the highest denitrification rate of 9763% and 9900%; the highest aromatics saturation rate of 67.99% and 68.88%,while only to 537,64.6 μg/g and 9457%,95.54%,6565% over the reference catalyst.
2014, 27 (1): 11-16.
DOI:
10.3969/j.issn.1006-396X.2014.01.003
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Pilot Plant Study for 160 kg/h C
16
C
19
ReAlkylene Alkylation Process
LU Ruizhen, WANG Dehui, ZHAO Dezhi
Abstract
(
544
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301
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With the method of hydrofluoric acidalkylation(the UOP method), realkylene(C
16
C
19
) was reacted. By this reaction, the relevant process data was obtained, the alkylation pilot technology was developed, and the underlying industrialized data was provided. When the reaction temperature is 50 ℃, the reaction pressure is 0.88 MPa, reaction time is 20 min, the amount of substance ratio for benzene and heavy hydride olefinic is 8∶1 and the volume ratio for HF and hydrocarbon is 2∶1, the conversion rate can be the best for 10.4%.
2013, 26 (1): 36-39.
DOI:
10.3969/j.issn.1006396X.2013.01.009