Catalytic kinetics of dimethyl ether one-step synthesis over CeO2-CaO-Pd/HZSM-5 catalyst in sulfur-containing syngas process

doi:10.1016/j.cjche.2016.09.008

›› 2016, Vol. 24 ›› Issue (12): 1735-1741.DOI: 10.1016/j.cjche.2016.09.008

• Catalysis, Kinetics and Reaction Engineering • Previous Articles Next Articles

Catalytic kinetics of dimethyl ether one-step synthesis over CeO₂-CaO-Pd/HZSM-5 catalyst in sulfur-containing syngas process

Ruizhi Chu^1,2, Wenxin Hou¹, Xianliang Meng^1,2, Tingting Xu¹, Zhenyong Miao¹, Guoguang Wu¹, Lei Bai³

1 School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou 221116, China;
2 High-Tech Research Institute of China University of Mining and Technology, Lianyungang 222000, China;
3 Department of Chemical and Biomedical Engineering, West Virginia University, Morgantown 26506, USA

Received:2016-08-01 Revised:2016-09-07 Online:2017-01-04 Published:2016-12-28
Supported by:
Supported by the National Natural Science Foundation of China (51204179, 51204182, 51674256) and The Natural Science Foundation of Jiangsu Province, China (BK20141242).

Catalytic kinetics of dimethyl ether one-step synthesis over CeO₂-CaO-Pd/HZSM-5 catalyst in sulfur-containing syngas process

Ruizhi Chu^1,2, Wenxin Hou¹, Xianliang Meng^1,2, Tingting Xu¹, Zhenyong Miao¹, Guoguang Wu¹, Lei Bai³

1 School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou 221116, China;
2 High-Tech Research Institute of China University of Mining and Technology, Lianyungang 222000, China;
3 Department of Chemical and Biomedical Engineering, West Virginia University, Morgantown 26506, USA

通讯作者: Xianliang Meng,E-mail address:hwxcumt@163.com
基金资助:
Supported by the National Natural Science Foundation of China (51204179, 51204182, 51674256) and The Natural Science Foundation of Jiangsu Province, China (BK20141242).

Abstract

Abstract: 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.

Key words: CeO₂-CaO-Pd/HZSM-5 catalyst, DME, One-step synthesis, Catalytic kinetics, Sulfur-containing syngas

摘要： 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.

关键词: CeO₂-CaO-Pd/HZSM-5 catalyst, DME, One-step synthesis, Catalytic kinetics, Sulfur-containing syngas

Ruizhi Chu, Wenxin Hou, Xianliang Meng, Tingting Xu, Zhenyong Miao, Guoguang Wu, Lei Bai. Catalytic kinetics of dimethyl ether one-step synthesis over CeO₂-CaO-Pd/HZSM-5 catalyst in sulfur-containing syngas process[J]. , 2016, 24(12): 1735-1741.

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Catalytic kinetics of dimethyl ether one-step synthesis over CeO₂-CaO-Pd/HZSM-5 catalyst in sulfur-containing syngas process

Catalytic kinetics of dimethyl ether one-step synthesis over CeO₂-CaO-Pd/HZSM-5 catalyst in sulfur-containing syngas process

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