文献类型：期刊文献

英文题名：Calcium-promoted catalytic activity of potassium carbonate for steam gasification of coal char: Transformations of sulfur

作者：Liu, Lijuan[1];Liu, Huijun[2];Cui, Mingqi[1];Hu, Yongfeng[3];Wang, Jie[2]

机构：[1]Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China;[2]E China Univ Sci & Technol, Minist Educ, Key Lab Coal Gasificat & Energy Chem Engn, Dept Chem Engn Energy, Shanghai 200237, Peoples R China;[3]Canadian Light Source, Saskatoon, SK S7N 0X4, Canada

年份：2013

卷号：112

起止页码：687

外文期刊名：FUEL

收录：;EI(收录号：20134316901868);WOS:【SCI-EXPANDED(收录号:WOS:000321735400095)】；

基金：The research work is funded by the National Program on Key Basic Research Project (973 Program, Grant No. 2010CB227005-03) and the National Natural Science Foundation of China (Grant No. 21076081). We acknowledge the staff at Canadian Light Source (CLS) for their support, and the CLS is financially supported by CFI, NRC, NSERC, OIT, and the University of Saskatchewan. We thank Lei Zheng and Yidong Zhao at BSRF, Institute of High Energy Physics for joining some XANES experiment.

语种：英文

外文关键词：Coal char; Catalytic gasification; Pyrolysis; Sulfur; XANES

摘要：K2CO3-catalyzed char gasification with steam was carried out on a laboratory fix-bed reactor and it featured in the preparation of char from a high-sulfur coal by the prior addition of Ca(OH)(2) to the coal. This work was focused on the clarification of sulfur transformations during the coal pyrolysis and the char gasification. Sulfur K-edge X-ray absorption near edge structure (XANES) spectroscopy was employed to determine quantitatively the forms of sulfur in coal and their changes in process. Results showed that the addition of Ca(OH)(2) to coal promoted the decomposition of both pyrite and organic sulfur during the charring. In the K2CO3-catalyzed char gasification, the calcium additive enabled more sulfur to be retained eventually as K2SO4 rather than CaSO4. The formation of K2SO4 would be conducive to the recycled use of potassium catalyst. (C) 2012 Elsevier Ltd. All rights reserved.