文献类型：期刊文献

英文题名：Structure Characterization and CO2 Gasification Kinetics of Tri-High Coal-Chars Derived from High-Temperature Pyrolysis

作者：Liu, Lang Kong, Bowen Jiao, Qingrui Yang, Jian Liu, Qingcai Liu, Xiaoyu

第一作者：刘浪;Liu, Lang

通信作者：Liu, L[1];Liu, L[2]

机构：[1]Guizhou Inst Technol, Inst Chem Engn, Guiyang 550003, Guizhou, Peoples R China;[2]Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China

第一机构：贵州理工学院化学工程学院

通信机构：corresponding author), Guizhou Inst Technol, Inst Chem Engn, Guiyang 550003, Guizhou, Peoples R China;corresponding author), Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China.|贵州理工学院化学工程学院;贵州理工学院;

年份：2019

卷号：4

期号：21

起止页码：19030-19036

外文期刊名：ACS OMEGA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000497960900011)】；

基金：This study was supported by the Science and Technology Planning Project of Guizhou province (Qiankehejichu [2018] 1066), Young Teachers Training Project of Guizhou Institute of Technology ([2017]5789-05), Guizhou Science and Technology Support Project (Qiankehe Zhicheng [2019] 2872) and the Research Start-up Funding Project for High-level Talents of Guizhou Institute of Technology.

语种：英文

摘要：The pore structures and chemical composition features of two kinds of tri-high coal and their char samples prepared at a 750 degrees C temperature were analyzed. The results showed that the pyrolysis process has a great influence on the pore structure and the chemical composition of the char, and the influence is highly related to the coal ranks. The gasification kinetics of the two chars in pure CO2 atmosphere was also studied. The results indicated that the classical random pore model (RPM) cannot be used to explain the gasification kinetics throughout the char gasification. A modified RPM, considering the inhibitory effect of ash on the gasification kinetics, was adopted to estimate the kinetics, and the kinetic constants and the corresponding activation energies were calculated. It was observed that it was necessary to include the effect of ash on the variations of char structures during the char gasification to get an accurate description of reaction rate versus carbon conversion throughout the gasification of the tri-high coal chars.