Influence of pore structure on thermal stress distribution inside coal particles during primary fragmentation
作者机构：School of Chemical EngineeringSichuan UniversityChengdu610065China Institute of New Energy and Low-carbon TechnologyChengdu610207China
出 版 物：《Particuology》 (颗粒学报（英文版）)
年 卷 期：2024年第85卷第2期
页 面：49-61页
核心收录：
学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术]
基 金：supported by National Natural Science Foundation of China(grant No.21908150) China Postdoctoral Science Foundation(grant No.2019M653404) the Key Research&Development Program of Sichuan Province,China(grant No.22zDYF 1839) Sichuan University Post-Doctoral Interdisciplinary Innovation Initial Funding
主 题：Coal particle Primary fragmentation Thermal stress Pore structure Porosity
摘 要：Thermal stress is an important reason of coal particle primary fragmentation,during which the role of pore structure is *** stress induced fragmentation experiments were conducted with low volatile coal/char particles,and the results show that the fragmentation severity enhances with increasing *** porous thermal stress models were developed with finite element method,and the influences of the pore shape,size,position and porosity on the thermal stress were *** maximum thermal stress inside particle increases with pore curvature,the pore position affects the thermal stress more significantly at the particle center and *** expectation of the maximum tensile thermal stress linearly increases with porosity,making the particles with higher porosity easier to fragment,contrary to the conclusion deduced from the devolatilization *** obtained results are valuable for the analysis of different thermal processes concerning the thermal stresses of the solid feedstocks.
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