文献类型：期刊文献

中文题名：Determination of the calcium species in coal chars by Ca K-edge XANES analysis

英文题名：Determination of the calcium species in coal chars by Ca K-edge XANES analysis

作者：Liu Li-Juan[1];Liu Hui-Jun[2];Cui Ming-Qi[1];Hu Yong-Feng[3];Zheng Lei[1];Zhao Yi-Dong[1];Ma Chen-Yan[1];Xi Shi-Bo[1];Yang Dong-Liang[1];Guo Zhi-Ying[1];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, Shanghai 200237, Peoples R China;[3]Univ Saskatchewan, Canadian Light Source, Saskatoon, SK S7N 0X4, Canada

年份：2013

卷号：37

期号：2

中文期刊名：Chinese Physics C

外文期刊名：CHINESE PHYSICS C

收录：CSTPCD;;Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000320547600019)】；CSCD:【CSCD2013_2014】；

基金：Supported by National Program on Key Basic Research Project (2010CB227005-03) and National Natural Science Foundation of China (21076081, 10775150)The authors wish to thank the staff at the Canadian Light Source (CLS) for their assistance, and CFI, NRC, NSERC, OIT, and the University of Saskatchewan for the financial support given to the CLS.

语种：英文

中文关键词：char;pyrolysis;calcium;K-edge XANES

外文关键词：char; pyrolysis; calcium; K-edge XANES

摘要：Ca-based additives have been widely used as a sulfur adsorbent during coal pyrolysis and gasification. The Ca speciation and evolution during the pyrolysis of coal with Ca additives have attracted great attention. In this paper, Ca species in the coal chars prepared from the pyrolysis of Ca（OH）2 or CaCO3-added coals are studied by using Ca K-edge X-ray absorption near-edge structural spectroscopy. The results demonstrate that Ca（OH）2 , CaSO4 , CaS and CaO coexist in the Ca（OH）2-added chars, while Ca（OH）2 and CaSO4 are the main species in the Ca（OH）2-added chars. Besides, a carboxyl-bound Ca is also formed during both the pyrolysis for the Ca（OH）2-added and the CaCO3-added coals. A detailed discussion about the Ca speciation is given.
Ca-based additives have been widely used as a sulfur adsorbent during coal pyrolysis and gasification. The Ca speciation and evolution during the pyrolysis of coal with Ca additives have attracted great attention. In this paper, Ca species in the coal chars prepared from the pyrolysis of Ca(OH)(2) or CaCO3-added coals are studied by using Ca K-edge X-ray absorption near-edge structural spectroscopy. The results demonstrate that Ca(OH)(2), CaSO4, CaS and CaO coexist in the Ca(OH)(2)-added chars, while Ca(OH)(2) and CaSO4 are the main species in the Ca(OH)(2)-added chars. Besides, a carboxyl-bound Ca is also formed during both the pyrolysis for the Ca(OH)(2)-added and the CaCO3-added coals. A detailed discussion about the Ca speciation is given.