%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