文献类型：期刊文献

英文题名：Solvent Effects on Hydration of Cyclohexene over H-ZSM-5 Catalyst

作者：Shan, Xianglei[1];Cheng, Zhenmin[1];Li, Ying[1]

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

年份：2011

卷号：56

期号：12

起止页码：4310

外文期刊名：JOURNAL OF CHEMICAL AND ENGINEERING DATA

收录：;EI(收录号：20115114609103);WOS:【SCI-EXPANDED(收录号:WOS:000297608800007)】；

基金：The present work was conducted under support from the State Key Laboratory of Chemical Engineering in China via SKL-ChE-08C03 and partially from Natural Science Foundation of China via No. 20876043.

语种：英文

外文关键词：Activation energy - Hydration - Polyols - Solubility - Organic solvents - Catalysts - Ethylene - Pressure vessels - Phase equilibria

摘要：Hydration of cyclohexene over H-ZSM-5 catalyst was carried out in a batch autoclave reactor in the presence of different cosolvents. With ethylene glycol as the cosolvent, a cyclohexene conversion of 11.4 % was obtained, which is much higher than fiat of 8.2 % obtained without the cosolvent. To evaluate the solubility of cyclohexene in the presence of ethylene glycol, the liquid-liquid equilibria (LLE) data of cyclohexene + water + cyclohexanol -I- ethylene glycol were measured at 298.15 K. It was found that a modified UNIFAC model gives the best fits to the LLE data, and the solubility of cyclohexene has increased evidently. The kinetic behavior of the hydration reaction was then investigated in the temperature range from 383.15 to 413.15 K, with initial molar ratio of cyclohexene to ethylene glycol in the range from 2 to 20. The kinetic data were correlated with a simple pseudohomogeneous model and two heterogeneous ones based on the Langmuir-Hinshelwood-Hougen-Watson and Eley-Rideal mechanisms, respectively. The results showed that the addition of ethylene glycol does not change the reaction mechanism of cyclohexene hydration over H-ZSM-5 catalyst. Nevertheless, due to the solvation effect of ethylene glycol, the activation energy of the reaction was found decreased.