文献类型：期刊文献

英文题名：Characteristics and catalytic actions of inorganic constituents from entrained-flow coal gasification slag

作者：Wu, Shiyong[1,2];Huang, Sheng[1,2];Wu, Youqing[1,2];Gao, Jinsheng[1,2]

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

年份：2015

卷号：88

期号：1

起止页码：93

外文期刊名：JOURNAL OF THE ENERGY INSTITUTE

收录：;EI(收录号：20151000607221);WOS:【SCI-EXPANDED(收录号:WOS:000348949900011)】；

基金：This work was supported by the National Basic Research Program of China (No. 2010CB227003), the National High Technology Research and Development Program of China (No. 2012AA101810), the State Natural Science Foundation of China (No. 20876050) and the Opening Fund of State Key Laboratory of Coal Combustion in China (No. fsklcc0911).

语种：英文

外文关键词：Entrained-flow coal gasification; Gasification slag; Inorganic constituent; Crystalline component; Vitreous component

摘要：The morphology, mineralogy, and elemental distribution of inorganic constituents from two entrained-flow coal gasification slags were mainly investigated to understand the physico-chemical characteristics of the two slags. The fully molten and partly molten inorganic components in the coarse slag tend mainly to co-exist in the overlapping bulk of lumps and agglomerates, whereas the two ones in the fine slag almost tended to be discretely presented in spherical particles and agglomerates, respectively. The trace elements (Pb, As and Zn) with great volatile behaviors were easily concentrated into the fine slag. Summarily, the inorganic constituents in gasification slags predominantly contained crystalline components (silicates, aluminosilicates, and Ca-Fe and Fe oxides) and vitreous components (Ca-Fe-aluminosilicate glass). Simultaneously, a rough distribution model for main ash-forming elements in gasification slags was proposed. Also, the catalytic actions of inorganic constituents in the two gasification slags were assessed using a thermo-gravimetric analyzer. It was found that the inorganic constituents in gasification slags can take a distinct catalytic action on the carbon gasification, mainly due to the predominant presence of these catalytic components (Ca-Fe and Fe oxides). A higher gasification reactivity of the coarse slag was mainly ascribed to a higher content of its catalytic components, compared to the fine slag. (C) 2014 Energy Institute. Published by Elsevier Ltd. All rights reserved.