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Kinetic Model of Hydrogenation for Removal of Trace Olefins from Alkylation Mixture Formed during Linear alkylbenzene Synthesis

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China Petroleum Processing & Petrochemical Technology 2019年第1期21卷 46-54页

作者： Ren Jie Liu Bing Shen Lian College of Chemical Engineering Zhejiang University of Technology

Through the hydrogenation experiments for removal of olefin impurities in effluent mixture obtained from alkylation reactor for linear alkylbenzene synthesis, the reaction kinetics was studied. The experimental results showed that the catalytic activity of Pd/Al2 O3 among four kinds of catalysts was the highest, and the olefin conversion reached 100%when the reaction temperature was higher than 140 ℃. The kinetic model was established through parameters *** experimental validation of the kinetic model showed that the kinetic model had higher simulation accuracy. The results of prediction by the kinetic model indicated that with the intensification of reaction conditions, the olefin conversion would increase and the bromine index of the linear alkyl benzene would decrease. Under the conditions covering a WHSV of 2.0 h^(-1),a temperature of 90 ℃, and a hydrogen partial pressure of 1.5 MPa, the olefin conversion was 99.67%, and the bromine index of the linear alkyl benzene could be reduced to less than 20.00 mgBr/(100 g).

关键词： hydrogenation reaction kinetics linear alkylbenzene removal of olefin impurity bromine index

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Using monochromatic light to measure attenuation length of liquid scintillator solvent LAB

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Nuclear Science and Techniques 2019年第2期30卷 11-18页

作者： Rui Zhang De-Wen Cao Chang-Wei Loh You-Hang Liu Fang-Liang Wu Jia-Liang Zhang Ming Qi National Laboratory of Solid State Microstructures and School of Physics Nanjing University

Linear alkylbenzene(LAB) will be used as solvent for the liquid scintillator in the central detector of Jiangmen Underground Neutrino Observatory. The sheer size of the detector imposes significant challenges and the necessity to further improve the optical transparency of high-quality LAB. In order to study high optical transparencies, we continuously improve our measurement setup and use monochromatic light to measure the attenuation lengths of LAB samples. Moreover, the effects of organic impurities on LAB samples are studied to understand their interaction mechanisms and further improve the optical transparency of LAB.

关键词： Neutrino detector Linear alkylbenzene Light absorption

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Conversion of Benzene in the Catalytic Cracking Process

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China Petroleum Processing & Petrochemical Technology 2022年第3期24卷 77-85页

作者： Li Rui Yan Jiasong Geng Qiuyue Chen Hui Su Youyou Wang Yongchao SINOPEC Research Institute of Petroleum Processing Co. Ltd.Beijing 100083China Wuhan Jinsinopec Petrochemical Engineering Co. Ltd.Wuhan 430223China College of Chemistry and Chemical Engineering Xiamen UniversityXiamen 361005China Lier Chemical Co. Ltd.Chengdu 610052China

The catalytic cracking of 1-hexene,1-heptene,1-octene,1-nonene,1-decene,and five olefins mixed with benzene,over USY catalysts was conducted in a small fixed fluidized bed reactor to study the conversion of benzene under catalytic cracking *** mainly alkylated with C_(2)-C_(5)light olefins,generating monosubstituted alkylbenzenes,and the concentration of light olefins dramatically affected the alkylbenzene *** to the limitation of thermodynamic equilibrium,the yield of benzene alkylation to alkylbenzene in catalytic cracking was in a relative low *** equilibrium constant of benzene alkylation decreases with the increasing reaction temperature which resulted in reduction of alkyl benzene yield.

关键词： alkylbenzene benzene catalytic cracking cracking catalyst olefin

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