文献类型：期刊文献

英文题名：Comprehensive analysis on the in-situ ash fusibility and mineral reactions of ash mixtures in the co-gasification process

作者：Cao, Xi[1];Ge, Zefeng[2];Liu, Xia[1];Wu, Hao[1];Yu, Guangsuo[1]

机构：[1]East China Univ Sci & Technol, Inst Clean Coal Technol, POB 272, Shanghai 200237, Peoples R China;[2]Southeast Univ, Sch Energy & Environm, Key Lab Energy Thermal Convers & Control, Nanjing 210096, Peoples R China

年份：2023

卷号：241

外文期刊名：FUEL PROCESSING TECHNOLOGY

收录：;EI(收录号：20225013254295);WOS:【SCI-EXPANDED(收录号:WOS:000910854800005)】；

基金：Acknowledgments This work was supported by National Natural Science Foundation of China (grant numbers 22108080) .

语种：英文

外文关键词：High -silicon -aluminum coal; Rape straw ash; Fusibility; Mineral evolution; Heating stage microscope

摘要：Biomass can effectively modify coal ash fusibility and alleviate several operational issues like agglomeration, sintering, and erosion for slagging gasifiers. The key issue is to clarify the ash fusion properties and mineral transformation during the heating process. The fusion temperatures, mineral evolutions, in-situ morphology observation and thermodynamic analysis of the coal, biomass and biomass-coal blended ash samples were sys-tematically evaluated in this paper. The ash fusion temperatures (AFTs) presented V-type curves with the increasing rape straw ratio. Then the bottom point occurred at the ratio of 50 wt% due to the reduction of re-fractory minerals (mullite, quartz, < 50 wt%; kalsilite, oldhamite, >50 wt%) and the increase of low-melting -point minerals and their eutectics (leucite and anorthite). Besides, the thermodynamic calculation can provide the basis for the prediction of ash fusion behavior. The in-situ morphology evolutions of blended ashes further revealed the relationship between ash fusion behaviors and morphological changes. Namely, the terminative sintering and melting temperature were highly related to the ash deformation temperature and flow temperature, R2 was 0.9901 and 0.9846, respectively. The significant work could guide the mixing conditions during the co -gasification of high-silicon-aluminum coal and biomass and improve the ash fusion properties.