文献类型：期刊文献

英文题名：Kinetics of hydrogenation of dimethyl 1,4-cyclohexanedicarboxylate to 1,4-cyclohexanedimethanol

作者：Zhou, Xiangze[1];Shen, Weihua[1,2];Fang, Yunjin[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2023

卷号：55

期号：8

起止页码：455

外文期刊名：INTERNATIONAL JOURNAL OF CHEMICAL KINETICS

收录：;EI(收录号：20231714006974);WOS:【SCI-EXPANDED(收录号:WOS:000971623500001)】；

基金：ACKNOWLEDGMENTS This work is supported by Natural Science Basic Research Program of Shaanxi - Shaanxi Coal and Chemical Industry Joint Foundation (Program No.: 2019JLM-20), and supported by the National Natural Science Foundation of China (Project No. 21576083).

语种：英文

外文关键词：1; 4-cyclohexanedicarboxylate; 4-cyclohexanedimethanol; dimethyl; kinetic study; LHHW model

摘要：The kinetics of dimethyl 1,4-cyclohexanedicarboxylate (DMCD) hydrogenation, via the half-hydrogenated product methyl 4-(hydroxymethyl) cyclohexanecarboxylate (MHMCC), to 1,4-cyclohexanedimethanol (CHDM) in gas phase was established over CuMnAl catalyst. The intrinsic kinetic experiments were carried out on a fixed-bed reactor under a wide range of reaction conditions with temperature varied from 493 to 523 K, pressure varied from 4 to 6 MPa, and weight hourly space velocity of DMCD varied from 0.948 to 3.792 h(-1). Eight rival possible two-site LHHW models were proposed to simulate the experimental results. The model involving dissociative adsorption of esters and surface reaction as the rate-determining step was found to fit the experimental data best. The rather large activation energy values (138.4 and 121.4 kJ center dot mol(-1)) of two reactions (DMCD to MHMCC and MHMCC to CHDM) suggest that the reactions are both temperature sensitive. The coefficients of determination (R-2) for DMCD conversion and CHDM selectivity were 0.989 and 0.983 respectively. Statistical and thermodynamic test further verified the reliability of the results.