Physicochemical Properties of Coal Gasification Fly Ash from Circulating Fluidized Bed Gasifier

作     者：YANG Qiyao QI Xiaobin LYU Qinggang ZHU Zhiping YANG Qiyao;QI Xiaobin;LYU Qinggang;ZHU Zhiping

作者机构：School of EnergyPower and Mechanical EngineeringNorth China Electric Power UniversityBeijing102206China Institute of Engineering ThermophysicsChinese Academy of SciencesBeijing100190China University of Chinese Academy of SciencesBeijing100049China 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2023年第32卷第4期

页      面：1710-1720页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

基　　金：This work was financially supported by the Special Research Assistant Fund Project of Chinese Academy of Sciences 

主　　题：circulating fluidized bed coal gasification fly ash physicochemical properties pore structure porous carbon materials 

摘      要：The coal gasification fly ash(CGFA) is an industrial solid waste from coal gasification process and needs to be effectively disposed for environmental protection and resource *** further clarify the feasibility of CGFA to prepare porous carbon materials,the physicochemical properties of ten kinds of CGFA from circulating fluidized bed(CFB) gasifiers were analyzed in *** results of proximate and ultimate analysis show that the CGFA is characterized with the features of near zero moisture content,low volatile content as low as 0.90%-9.76%,high carbon content in the range of 37.89%-81.62%,and ultrafine particle size(d50=15.8-46.2 μm).The automatic specific surface area(SSA) and pore size analyzer were used to detect the pore structure,it is found that the pore structure of CGFA is relatively developed,and part of the CGFA has the basic conditions to be used directly as porous carbon *** SEM images,the microscopic morphology of the CGFA is significantly different,and they basically have the characteristics of loose and porous *** and Roman spectroscopy were used to characterize the carbon *** result shows that the CGFA contains abundant amorphous carbon structure,and thus the CGFA has a good reactivity and a potential to improve pore structure through further *** thermal gravimetric analysis,it can be concluded that the order of reactivity of the CGFA under CO_(2) atmosphere has a good correlation with the degree of metamorphism of the raw *** gasification reactivity of the CGFA is generally consistent with the change trend of micropores combined with the pore *** to the physicochemical properties,the CGFA has a good application prospect in the preparation of porous carbon materials.