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20 results on '"Xie Kechang"'

19. Synergistic effect between CO2 and H2O on reactivity during coal chars gasification.

Author

Bai, Yonghui, Wang, Yulong, Zhu, Shenghua, Yan, Lunjing, Li, Fan, and Xie, Kechang

Subjects
*CARBON dioxide, *WATER analysis, *COAL gasification, *TEMPERATURE effect, *CATALYTIC activity, *CALCIUM
Abstract

Highlights: [•] CO2 utilization as gasifying agent during H2O-char gasification was studied. [•] Synergy was revealed during coal gasification with CO2/H2O mixture in low temperature. [•] The high catalytic activity of Ca species in CO2 gasification leads to the synergy. [ABSTRACT FROM AUTHOR]

Published
2014
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20. Influence of the calcination on the activity and stability of the Cu/ZnO/Al2O3 catalyst in liquid phase methanol synthesis

Author

Zhang, Xiaobing, Zhong, Li, Guo, Qihai, Fan, Hui, Zheng, Huayan, and Xie, Kechang

Subjects
*ROASTING (Metallurgy), *THERMOGRAVIMETRY, *METHANOL, *PRECIPITATION (Chemistry), *CATALYSTS, *HIGH temperature chemistry
Abstract

Abstract: Catalyst Cu/ZnO/Al2O3 was prepared through co-precipitation method and investigated in a stirred slurry autoclave reactor system for methanol synthesis. The structure of the catalysts was studied by derivative thermogravimetry (DTG), X-ray diffraction (XRD) and H2 temperature programmed reduction (H2-TPR). The results show that the average size of CuO crystallite of the catalyst was 3.23nm when the catalyst was calcined at 623K for 2.0h, and the catalyst with this size of CuO crystallite is highly active and stable. Its space time yield and deactivation rate reached 172.2g/kgcat·h and 0.43%/d, respectively under the reaction conditions of 513K, 4.0MPa, H2/CO/CO2 =68/24/5 and space velocity=810ml/gcat·h. [Copyright &y& Elsevier]

Published
2010
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