文献类型：期刊文献

英文题名：Study on the structure characteristics and gasification activity of residual carbon in biomass ashes obtained from different gasification technologies

作者：Zhang, Weiwei[1];Huang, Sheng[1,2];Wu, Shiyong[1,2];Wu, Youqing[1,2];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：2019

卷号：254

外文期刊名：FUEL

收录：;EI(收录号：20192607113085);WOS:【SCI-EXPANDED(收录号:WOS:000476980200141)】；

基金：This work was supported by the National Natural Science Foundation of China (Grant No. 21506060); and the Fundamental Research Funds for the Central Universities (Grant No. 222201718003).

语种：英文

外文关键词：Updraft fixed bed gasifier; Circulating fluidized bed gasifier; Residual carbon; Structure characteristics; Gasification activity

摘要：The structure characteristics and gasification activity of residual carbons in two rice husk (RH) gasification ashes, a fly ash (FA(C)) obtained from industrial circulating fluidized bed gasifier (CFBG) and a bottom ash (BA(U)) obtained from industrial updraft fixed bed gasifier (UFBG), were investigated. Results show that the residual carbon content of FA(C) (15.93%, dry basis) is much lower than that of BA(U) (40.27%, dry basis), and the carbon conversion efficiencies of RH in CFBG and UFBG are 93.09% and 74.44%, respectively. The dominant carbon species in RH is oxygen-linked aliphatic carbon (ca. 80%), which disappears in the residual carbons of FA(C) and BA(U). Consequently, the nonprotonated aromatic carbon in RH increases significantly from about 3% to 66-68% during gasification processes, leading to the aromaticity of carbon increases from about 15% to 88-90%. The surface area and pore volume of carbon in RH increase significantly during gasification processes, especially those of FA(C), while the gasification activity of carbon in RH decreases slightly due to the increased aromaticity of carbon.