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: Effect of hydrothermal pretreatment

作者：Jiang, Mingquan[1];Hu, Jie[1];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

年份：2013

卷号：109

起止页码：14

外文期刊名：FUEL

收录：;EI(收录号：20133716739589);WOS:【SCI-EXPANDED(收录号:WOS:000320651700004)】；

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; Catalytic gasification; Potassium carbonate; Calcium hydroxide; Hydrothermal treatment

摘要：Hydrothermal pretreatment of coal with the addition of Ca(OH)(2) was found more effective for promoting the K2CO3-catalyzed char gasification than the physical addition way for both JY anthracite coal and HB bituminous coal used. The effect of hydrothermal pretreatment was more remarkable for JY coal which suffers significant catalyst deactivation due to its high mineral content. For this type of coal, employing more severe hydrothermal pretreatment conditions was proven to significantly enhance the gasification rate. It was observed that kaolinite and quartz in coal hydrothermally reacted with calcium forming hydrated calcium aluminosilicates, which, unlike the original minerals, was inactive for the deactivation reactions of potassium. Consequently, the hydrothermal pretreatment allowed more potassium to persist as a water-soluble entity during the gasification. This was a main mechanism underlying the promoted catalytic gasification by the hydrothermal treatment. (C) 2012 Elsevier Ltd. All rights reserved.