文献类型：期刊文献

英文题名：Enhanced catalysis of K₂CO₃ for steam gasification of coal char by using Ca(OH)₂ in char preparation

作者：Wang, Jie[1];Yao, Yihong[1];Cao, Jianqin[1];Jiang, Mingquan[1]

机构：[1]E China Univ Sci & Technol, Dept Chem Engn Energy, Shanghai 200237, Peoples R China

年份：2010

卷号：89

期号：2

起止页码：310

外文期刊名：FUEL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000271295400007)】；

基金：This study is sponsored mainly by the National "863" Scientific Research Program (Contract No. 2006AA05Z116). The first author expresses thanks to the Program for Changjiang Scholars and Innovative Research Team in University in China (IRT0620) and to Dr. O. Yamada in AIST, Japan for his kindly providing the coal sample. The authors sincerely appreciate Professor A. Tomita and two anonymous reviewers for their invaluable advices on the revision of this paper.

语种：英文

外文关键词：Coal char; Gasification; Hydrogen

摘要：A novel approach has been proposed for mitigating the potassium deactivation in the K2CO3-catalyzed steam gasification of coal char by addition of Ca(OH)(2) in the char preparation. It was experimentally found that the Ca(OH)(2)-added char had higher reactivity for the catalytic gasification than the raw char. Ca(OH)(2) played a role in suppressing the interactions of K2CO3 with acidic minerals in coal during the gasification and also probably in forming more active oxygenated intermediate on the char surface. The distribution of gaseous products was examined during the catalytic gasification. An oxygen transfer and intermediate hybrid mechanism is applied for understanding of the rate and selectivity of the catalytic gasification. (c) 2009 Elsevier Ltd. All rights reserved.