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

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外文摘要：Fine slag(FS)is an unavoidable by-product of coal gasification.FS,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 technologies.The multiscale analysis of FS performed in this study indicates typical grain size distribution,composition,crystalline structure,and chemical bonding characteristics.The FS primarily contained inor-ganic and carbon components(dry bases)and exhibited a"three-peak distribution"of the grain size and regular spheroidal as well as irregular shapes.The irregular particles were mainly adsorbed onto the structure and had a dense distribution and multiple pores and folds.The 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 structures.The inor-ganic components,constituting 90％of the total sample,were primarily silicon,aluminum,iron,and calcium.The inorganic components contained Si-O-Si,Si-O-Al,Si-O,SO42-,and Fe-O bonds.Fe 2p XPS spectrum could be deconvoluted into Fe 2p1/2 and Fe 2p3/2 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.

外文关键词：

Coal gasificationFine slagMultiscale analysisCarbon componentsInorganic components

作者：

Lirui Mao、Mingdong Zheng、Baoliang Xia、Facun Jiao、Tao Liu、Yuanchun Zhang、Shengtao Gao、Hanxu Li

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作者单位：

School of Chemical Engineering,Anhui University of Science and Technology,Huainan 232001,China

School of Earth and Environment,Anhui University of Science and Technology,Huainan 232001,Chin

Insititute of Energy,Hefei Comprehensive National Science Center,Hefei 230031,China

基金：

Scientific Research Foundation for the Introduction of Talent in Anhui University of Science and TechnologyGraduate Research Project of Higher Education in Anhui ProvincePostgraduate Innovation Fund of Anhui University of Science and TechnologyUniversity Synergy Innovation Program of Anhui ProvinceNational Science Fund for Young Scientists

项目编号：

2023yjrc90YJS202103772021CX1002GXXT-2020-00652200139

出版年：

2024

DOI：

10.1007/s40789-023-00660-y

国际煤炭科学技术学报(英文)

CSTPCD

ISSN：2095-8293

年,卷(期)：2024.11(1)