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: Influences of calcium species

作者：Jiang, Ming-Quan[1];Zhou, Rong[1];Hu, Jie[1];Wang, Fu-Chen[2];Wang, Jie[1]

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

年份：2012

卷号：99

起止页码：64

外文期刊名：FUEL

收录：;EI(收录号：20122515125341);WOS:【SCI-EXPANDED(收录号:WOS:000305150900008)】；

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：Coal char; Gasification; Catalysis; Calcium species; Potassium carbonate

摘要：Experiments were carried out to investigate the K2CO3-catalyzed gasification performances for varying chars prepared from four coals with prior addition of calcium additive and without calcium additive. Three calcium species, Ca(OH)(2), Ca(Ac)(2) or Ca(CH3COO)(2), and CaCO3, were used in the study. Experiments were also conducted in an attempt to achieve the understanding of the effect of calcium additive on the potassium deactivation, as well as the interactive effect between potassium, calcium and char. It was found that each calcium additive acted as a deterrent to the potassium deactivation and thus promoted the catalytic gasification, and the magnitudes of promotion varied depending on coal and calcium species. Ca(OH)(2) and Ca(Ac)(2) were more effective to inhibit the potassium deactivation than CaCO3. Furthermore, potassium together with calcium showed a mineral-unrelated synergy towards the char gasification. A bimetallic carbonate, K2Ca(CO3)(2), which formed even when the chars prepared from coal with either Ca(OH)(2) or Ca(Ac)(2) was subsequently mixed with K2CO3, was likely to contribute to the synergistic effect. (C) 2012 Elsevier Ltd. All rights reserved.