%0 Journal Article
%A Ruizhi Chu
%A Wenxin Hou
%A Xianliang Meng
%A Tingting Xu
%A Zhenyong Miao
%A Guoguang Wu
%A Lei Bai
%T Catalytic kinetics of dimethyl ether one-step synthesis over CeO2-CaO-Pd/HZSM-5 catalyst in sulfur-containing syngas process
%D 2016
%R 10.1016/j.cjche.2016.09.008
%J Chinese Journal of Chemical Engineering
%P 1735-1741
%V 24
%N 12
%X CeO2-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 CeO2-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℃), pressure (3-4 MPa), gas hourly space velocity (GHSV) (2000-3000 L·kg-1·h-1) and H2/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.
%U https://cjche.cip.com.cn/EN/10.1016/j.cjche.2016.09.008