Study on physicochemical properties, distribution modes, and formation mechanism of coal gasification fine slag in an industrial entrained-flow gasifier

被引：11

作者：

Liu, Bin ^{[1
]}

Lv, Peng ^{[1
]}

Bai, Yonghui ^{[1
]}

Wang, Jiaofei ^{[1
]}

Su, Weiguang ^{[1
]}

Song, Xudong ^{[1
]}

Yu, Guangsuo ^{[1
,2
]}

机构：

[1] Ningxia Univ, Sch Chem & Chem Engn, State Key Lab High efficiency Utilizat Coal & Gree, Yinchuan 750021, Peoples R China

[2] East China Univ Sci & Technol, Inst Clean Coal Technol, Shanghai 200237, Peoples R China

来源：

CHEMICAL ENGINEERING SCIENCE | 2024年 / 299卷

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

Entrained-flow coal gasification; Fine slag; Distribution mode; Formation mechanism; PARTICLES;

D O I：

10.1016/j.ces.2024.120509

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Coal gasification fine slag (CGFS) contains an amount of residual carbon, which not only increases the difficulty of utilizing it as a resource but also hinders the efficient and low-carbon operation of gasification processes. In this study, the physicochemical properties, distribution modes and formation mechanisms of different CGFS particle size fractions were investigated. The CGFS particles with size > 180 mu m showed the lowest degree of graphitization, the particles in the range of 75 - 180 mu m contained the most residual carbon, and the particles < 45 mu m exhibited the least roughness. The carbon and ash fractions of CGFS show embedded, crosslink and discrete distribution modes, while the evolutionary process of raw coal particles in the gasifier can be divided into three stages: initial, transitional and late. Due to the different reaction histories experienced by the raw coal particles in the gasifier, the three carbon ash distribution modes do not occur independently.

引用

页数：11

共 53 条

[1] Study on the migration and structure evolution of the carbon in the slag layer and its effect on the coal slag transformation [J].