文献类型：期刊文献

英文题名：XANES spectroscopic study of sulfur transformations during co-pyrolysis of a calcium-rich lignite and a high-sulfur bituminous coal

作者：Liu, Lijuan[1];Fei, Jinxia[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, Dept Chem Engn Energy, Key Lab Coal Gasificat & Energy Chem Engn, Minist Educ, Shanghai 200237, Peoples R China;[3]Canadian Light Source, Saskatoon, SK S7N 0X4, Canada

年份：2014

卷号：121

起止页码：56

外文期刊名：FUEL PROCESSING TECHNOLOGY

收录：;EI(收录号：20140617291323);WOS:【SCI-EXPANDED(收录号:WOS:000332053500008)】；

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 staffs at Canadian Light Source (CLS) for their support and the financial support to CLS from CFI, NRC, NSERC, OIT, and the University of Saskatchewan. We thank Lei Zheng, Yidong Zhao and Chenyan Ma at BSRF, Institute of High Energy Physics for their help in the XANES experiment.

语种：英文

外文关键词：Coal; Co-pyrolysis; Sulfur; Calcium; XANES

摘要：Sulfur K-edge X-ray absorption near edge structure (XANES) spectroscopy was applied to determine the sulfur forms in a calcium-rich lignite coal (L coal) and a high-sulfur bituminous coal (B coal), and to investigate their transformations during the co-pyrolysis of two coals. Calcium K-edge XANES spectroscopy was used for examining the occurrence modes of calcium in two coals and their transformation during the coal pyrolysis. Sulfur was present in L coal in the form of thioether, thiophene, sulfate and sulfonate, and in B coal in the form of thiophene, pyrite, thioether and sulfate. Most calcium in L coal was organically associated. The co-pyrolysis was found to synergistically facilitate the progressive decomposition of pyrite and also result in the virtually complete elimination of thioether from the char, with the promoted retention of sulfur as CaS and CaSO4. It was evident that the calcium in L coal was an important factor underlying the synergistic effects on the sulfur transformations during the co-pyrolysis. (C) 2013 Elsevier B.V. All rights reserved.