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题名: Thermodynamics of ethylbenzene synthesis through alkylation of FCC off-gas with benzene by catalytic distillation
作者: Xu, LY;  Wang, QX;  Liu, WC;  Xie, SJ;  Sun, XD;  Bai, J;  Zhang, SR;  Wang, CD
关键词: benzene ;  ethylene ;  alkylation ;  distillation ;  ethylbenzene ;  toluene ;  xylene ;  thermodynamics
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2003
卷: 24, 期:1, 页:73-78
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: A catalytic distillation technique for synthesis of PhEt through alkylation of FCC off-gas with C6H6 was developed. C6H6 could react with C2H4 at a much lower temperature, being favorable to PhEt selectivity and prohibiting C6H4Me2 production. The results of the calculated equilibrium constants show that it is more favorable to produce PhMe and C6H4Me2 than PhEt and C6H4Et2, compared with the alkylation of C6H6 with C2H4 under liquid-phase condition, and the equilibrium constant for PhMe or C6H4Me2 is 100 times as high as that for PhEt or C6H4Et2 in the reaction of C6H6 with C2H4. In order to prohibit the formation of PhMe and C6H4Me2 from the point of dynamics, it is very important to develop catalysts with high selectivity for PhEt and C6H4Et2 By analyzing the complicated reaction process, a new dynamics network for alkylation of C6H6 with C2H4, as well as that for transalkylation of C6H6 with diethylbenzene, has been proposed according to the detailed thermodynamics calculation and the factual product distribution. The effects of different reaction conditions on product distribution are also discussed. Low temperature, high C6H6/C2H4 molar ratio and appropriate pressure are suitable for the increase of C2H4 conversion and PhEt selectivity. The formation mechanism of PhMe and C6H4Me2, and its influence factors have been studied. The formation of PhMe and C6H4Me2 is dynamically determined by cleavage of C-C bonds in C2H4. For the catalytic distillation process, lower temperature can greatly put off the cleavage velocity of C-C bonds and suppress the formation of PhMe and C2H4Me2.
语种: 英语
WOS记录号: WOS:000180791900017
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138330
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Liaoning, Peoples R China
2.PetroChina Co Ltd, Fushun Petrochem Corp, Fushun 113004, Liaoning, Peoples R China

Recommended Citation:
Xu, LY,Wang, QX,Liu, WC,et al. Thermodynamics of ethylbenzene synthesis through alkylation of FCC off-gas with benzene by catalytic distillation[J]. CHINESE JOURNAL OF CATALYSIS,2003,24(1):73-78.
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