文献类型：期刊文献

英文题名：CO2 Gasification Kinetics and Structural Characteristics of Tri-High Coal Char Prepared at Elevated Temperature

作者：Liu, Lang Kong, Bowen 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, Chem Engn Inst, 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

通信机构：corresponding author), Guizhou Inst Technol, Chem Engn Inst, 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;

年份：2020

卷号：5

期号：1

起止页码：507-517

外文期刊名：ACS OMEGA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000507578300053)】；

基金：This study was supported by the Science and Technology Planning Project of Guizhou province (Qiankehejichu [2018] 1066), the Young Teachers Training Project of Guizhou Institute of Technology ([2017]5789-05), the Guizhou Science and Technology Support Project (contract no: Qiankehe Zhicheng [2019]2872), the Guizhou Science and Technology Department cooperative Program (Qiankehe LH[2015]7107), the Bidding and Subsidizing Project of Guizhou Provincial Education Department (Qianjiaohe KY[2015]353), and the Research Start-up Funding Project for High-level Talents of Guizhou Institute of Technology.

语种：英文

摘要：The combined effects of surface area, pore structure, degree of graphitization, and number of carbon functional groups on the gasification kinetics of tri-high coal char prepared at an elevated temperature were studied by a thermogravimetric analyzer and various characterization methods [scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) theory, X-ray diffraction (XRD), Raman spectroscopy, and Fourier transfer infrared spectroscopy]. In the kinetic analysis, the CO2 gasification of high-ash coal was not adequately described by the random pore model because ash influenced the char structure during pyrolysis and gasification. Meanwhile, the SEM and BET results indicated the promotion of micropore formation and mesopore expansion of the coal char during pyrolysis. The XRD, Raman, and FTIR results evidenced a significant increase of large aromatic groups during the pyrolysis process, attributable to the cracking of aliphatic groups and the polycondensation of the cracking residues. Overall, the porous structure and aromatic groups of coal char developed during the pyrolysis process improved the CO2 gasification kinetics of the tri-high coal char.