文献类型：期刊文献

英文题名：Calcium-promoted catalytic activity of potassium carbonate for gasification of coal char: The synergistic effect unrelated to mineral matter in coal

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

机构：[1]E China Univ Sci & Technol, Dept Chem Engn Energy, Key Lab Coal Gasificat & Energy Chem Engn, Minist Educ, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China

年份：2013

卷号：111

起止页码：628

外文期刊名：FUEL

收录：;EI(收录号：20132516440546);WOS:【SCI-EXPANDED(收录号:WOS:000321037600075)】；

基金：The research work is funded by the National Natural Science Foundation of China (Grant No. 21076081) and the National Program on Key Basic Research Project (973 Program, Grant No. 2010CB227005-03)

语种：英文

外文关键词：Char gasification; Bimetallic catalyst; Synergistic effect; XANES; TG-DSC

摘要：The purpose of this work is to investigate the synergistic catalysis between calcium species and K2CO3 for the char gasification. Graphite and four mineral-free chars including an anthracite coal char, a bituminous coal char, a lignite coal char and a pine wood char were gasified at 750 degrees C in a stream of steam/argon under atmospheric pressure. It was found that each of three calcium species (Ca(OH)(2), Ca(CH3COO)(2) or Ca(Ac)(2), and CaCO3) synergistically promoted the catalytic activity of K2CO3 for the gasification of all samples, and the extent of promotion was dependent on calcium species and carbon or char samples. The formation of a eutectic from the calcium species/K2CO3 catalyst was proved to be an important mechanism for its better catalytic effect. The presence of the organically bound calcium on the char was also likely to be responsible for the promoted catalytic gasification. (C) 2013 Elsevier Ltd. All rights reserved.