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Multiscale analysis of fine slag from pulverized coal gasification in entrained-flow bed

International Journal of Coal Science & Technology 2024年第1期11卷 119-132页

作者： Lirui Mao Mingdong Zheng Baoliang Xia Facun Jiao Tao Liu Yuanchun Zhang Shengtao Gao Hanxu Li School of Chemical Engineering Anhui University of Science and TechnologyHuainan232001China School of Earth and Environment Anhui University of Science and TechnologyHuainan232001China Insititute of Energy Hefei Comprehensive National Science CenterHefei230031China

fine slag(FS)is an unavoidable by-product of coal ***,which is a simple heap of solid waste left in the open air,easily causes environmental pollution and has a low resource utilization rate,thereby restricting the development of energy-saving coal gasification *** multiscale analysis of FS performed in this study indicates typical grain size distribution,composition,crystalline structure,and chemical bonding *** FS primarily contained inorganic and carbon components(dry bases)and exhibited a"three-peak distribution"of the grain size and regular spheroidal as well as irregular *** irregular particles were mainly adsorbed onto the structure and had a dense distribution and multiple pores and *** carbon constituents were primarily amorphous in structure,with a certain degree of order and active sites.C 1s XPS spectrum indicated the presence of C–C and C–H bonds and numerous aromatic *** inorganic components,constituting 90%of the total sample,were primarily silicon,aluminum,iron,and *** inorganic components contained Si–O-Si,Si–O–Al,Si–O,SO_(4)^(2−),and Fe–O *** 2p XPS spectrum could be deconvoluted into Fe 2p_(1/2) and Fe 2p_(3/2) peaks and satellite peaks,while Fe existed mainly in the form of Fe(III).The findings of this study will be beneficial in resource utilization and formation mechanism of fine slag in future.

关键词： Coal gasification fine slag Multiscale analysis Carbon components Inorganic components

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