文献类型：期刊文献

英文题名：Kinetic studies on the pyrrole-Cr-based Chevron-Phillips ethylene trimerization catalyst system

作者：Tang, Siyang[1];Liu, Zhen[1];Yan, Xiaowei[1];Li, Ning[1];Cheng, Ruihua[1];He, Xuelian[1];Liu, Boping[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2014

卷号：481

起止页码：39

外文期刊名：APPLIED CATALYSIS A-GENERAL

收录：;EI(收录号：20142217777596);WOS:【SCI-EXPANDED(收录号:WOS:000339132300005)】；

基金：This work was financially supported by National Natural Science Foundation of China (21004020, 21174037), Program of Introducing Talents of Discipline to Universities (B08021) and Fundamental Research Funds for the Central Universities. Here we also thank Westlake Chemical Corporation and PetroChina Petrochemical Research Institute Daqing Petrochemical Research Center for their financial supports.

语种：英文

外文关键词：Kinetic study; Ethylene trimerization; 1-Hexene; Pyrrole-Cr based catalyst

摘要：An extensive experimental kinetic study of ethylene trimerization was carried out over the Chevron-Phillips homogeneous catalyst system [Cr(2-ethylhexanoate)3 (Cr(2-EH)3)/2,5-dimethylpyrrole (DMP)/co-catalyst/ halide] in terms of the effects from organic halide additives, type of co-catalysts, temperature, ethylene pressure, Cr concentration, and ligand/Cr molar ratio, etc. Ten kinds of organic halides and four kinds of organometallic co-catalysts were tested in this work. The 1,1,2,2-tetrachloroethane (TCE) and triethylaluminum (TEA) were found to be the best candidates for this catalyst system. The molar ratios of DMP/Cr, TCE/Cr and TEA/Cr showed a strong impact on the catalytic performance of ethylene trimerization. A detailed catalytic kinetic behavior and the kinetic simulation were also performed for the first time over this catalyst system. It could be extrapolated that the dependency of the trimerization reaction rate on ethylene concentration and catalyst concentration is second-order and first-order, respectively. The apparent activation energy of this reaction is 99.1 kj/mol at the temperature range from 65 C to 95 C. And the apparent reaction rate equation is achieved as follows:. R = 5.23 x 1018 exp.1 cc12c1.95. (C) 2014 Elsevier B.V. All rights reserved.