文献类型：期刊文献

英文题名：Structure characteristics and gasification activity of residual carbon from updraft fixed-bed biomass gasification ash

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

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

年份：2017

卷号：136

起止页码：108

外文期刊名：ENERGY CONVERSION AND MANAGEMENT

收录：;EI(收录号：20170203243919);WOS:【SCI-EXPANDED(收录号:WOS:000395212000011)】；

基金：The authors acknowledge the financial support provided by the National Natural Science Foundation of China (Grand No. 21506060) and the National High Technology Research and Development Program of China (No. 2012AA101810).

语种：英文

外文关键词：Updraft fixed-bed gasifier; Biomass gasification ash; Residual carbon; Structure characteristics; Gasification activity

摘要：The structure characteristics and gasification activity of residual carbon in biomass ash from a 5 MW commercial updraft fixed-bed gasification power plant were investigated using a Raman spectroscopy, a pore structure analyzer and a thermo-gravimetric analyzer. In the investigated biomass gasification ashes, some fractions with a relatively high residual carbon contents could be probably recycled as fuel of gasifier. The crystalline structure of residual carbons in biomass gasification ashes were poorly organized, and the total active sites (sp(2) and mixed sp(2)-sp(3) bond forms) of residual carbons with were ordered as: fly ash > rice straw > bottom ash. The residual carbons in gasification ashes had a higher surface area and a higher gasification activity than those of rice straw. The residual carbons in bottom ashes had a lower surface area, more ordered carbon crystalline structures and less total active sites than those of fly ash. Consequently, the residual carbons in bottom ashes presented a lower gasification activity. The residual carbon which was generally considered as "unburnt carbon" in gasification ashes were probably originated from partly-gasified carbons and unreacted pyrolytic carbons. (C) 2016 Elsevier Ltd. All rights reserved.