文献类型：期刊文献

英文题名：Utilization of biomass ash for upgrading petroleum coke gasification: Effect of soluble and insoluble components

作者：He, Qing[1];Yu, Junqin[1];Song, Xudong[2];Ding, Lu[1,3];Wei, Juntao[1];Yu, Guangsuo[1,2]

机构：[1]East China Univ Sci & Technol, Inst Clean Coal Technol, Shanghai 200237, Peoples R China;[2]Ningxia Univ, State Key Lab High Efficiency Coal Utilizat & Gre, Yinchuan 750021, Peoples R China;[3]Tokyo Inst Technol, Dept Environm Sci & Technol, Midori Ku, 4259 Nagatsuta Cho, Yokohama, Kanagawa 2268503, Japan

年份：2020

卷号：192

外文期刊名：ENERGY

收录：;EI(收录号：20194907790245);WOS:【SCI-EXPANDED(收录号:WOS:000515212800007)】；

基金：This work was supported by National Natural Science Foundation of China (21878093).

语种：英文

外文关键词：Catalytic gasification; Petroleum coke; Biomass ash; Kinetics; Structural evolution

摘要：In this paper, the catalytic effect of different components in biomass ash on petroleum coke (PC) gasification was studied. Cotton straw ash with high content of AAEMs and low content of silica, was prepared and pretreated by washing to obtain the soluble (ash leachate) and insoluble (washed ash) components. These ash-based catalysts were added to PC via physical mixing or impregnation. The catalytic gasification performance and kinetics were investigated using a thermal-gravimetric analyzer (TGA), and the carbon structure evolution was determined by Raman spectroscopy. The results showed that all of these ash-based catalysts, even for the washed ash, had catalytic effect on PC gasification. The soluble component, mainly containing K, could speed up the gasification rate especially at the late stage. The catalytic activity of the soluble component was sensitive to temperature and conversion, while that of the insoluble component was steady. Moreover, the modified random pore model and nucleation and growth method were applied to analyze the gasification kinetics. In addition, the washed ash could inhibit the graphitization during gasification, whereas the ash leachate and original ash could enhance the generation of amorphous carbon. Possible mechanisms of catalytic gasification were proposed to explain these phenomena. (C) 2019 Elsevier Ltd. All rights reserved.