Catalytic kinetics of dimethyl ether one-step synthesis over CeO_2–CaO–Pd/HZSM-5 catalyst in sulfur-containing syngas process

作     者：Ruizhi Chu Wenxin Hou Xianliang Meng Tingting Xu Zhenyong Miao Guoguang Wu Lei Bai 

作者机构：School of Chemical Engineering and Technology China University of Mining & Technology Xuzhou 221116 China High-Tech Research Institute of China University of Mining and Technology Lianyungang 222000 China Department of Chemical and Biomedical Engineering West Virginia University Morgantown 26506 USA 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2016年第24卷第12期

页      面：1735-1741页

核心收录：

学科分类：081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

基　　金：Supported by the National Natural Science Foundation of China(51204179,51204182,51674256) The Natural Science Foundation of Jiangsu Province,China(BK20141242) 

主　　题：CeO_2–CaO –Pd/HZSM 5 catalyst DME One step synthesis Catalytic kinetics Sulfur containing syngas 

摘      要：CeO_2–CaO–Pd/HZSM-5 catalyst was prepared for the dimethyl ether(DME) one-step synthesis in a continuous fixed-bed micro-reactor from the sulfur-containing syngas. The catalytic stability over hybrid catalyst of CeO_2–CaO–Pd/HZSM-5 was investigated to ensure that the kinetics experimental results were not significantly influenced by induction period and catalytic deactivation. A large number of kinetic data points(40 sets) were obtained over a range of temperature(240–300 °C), pressure(3–4 MPa), gas hourly space velocity(GHSV)(2000–3000 L·kg^(-1)·h^(-1)) and H_2/CO mole ratio(2–3). Kinetic model for the methanol synthesis reaction and the dehydration of methanol were obtained separately according to reaction mechanism and Langmuir–Hinshelwood mechanism. Regression parameters were investigated by the method combining the simplex method and Runge–Kutta method. The model calculations were in appropriate accordance with the experimental data.