文献类型：期刊文献

英文题名：Decoupling study of municipal solid waste gasification: Effect of pelletization on pyrolysis and gasification of pyrolytic char

作者：Hu, Zichao[1,2];Gao, Peipei[1,2];Wang, Bin[1,2];Pan, Weitong[1,2];Ding, Lu[1,2];Tang, Longfei[1,2];Chen, Xueli[1,2];Wang, Fuchen[1,2]

机构：[1]Minist Educ, Engn Res Ctr Resource Utilizat Carbon Containing W, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Engn Res Internal Coal Gasificat, Shanghai 200237, Peoples R China

年份：2024

卷号：12

期号：6

外文期刊名：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING

收录：;EI(收录号：20244117166473);WOS:【SCI-EXPANDED(收录号:WOS:001335682600001)】；

基金：This work was supported by the National Natural Science Foundation of China (22108081) and the Fundamental Research Funds of the Cen-tral University (JKCB1241102) .

语种：英文

外文关键词：Municipal solid waste; Pelletization; Pyrolysis characteristics; Gasification reactivity; Fixed bed reactor

摘要：To explore the influence of pelletization on the thermal conversion of municipal solid waste (MSW), pyrolysis characteristics and gasification reactivity of MSW pellet and powder were investigated in this study. Besides, the physicochemical properties of internal char and external char within the char pellet were separately characterized. Moreover, the relationship between the physicochemical properties of char pellet and its gasification reactivity was clarified. Results showed that the pyrolytic gas yields of MSW pellets were increased by 15.47 % and 11.55 % at 700 degrees C and 800 degrees C, respectively, compared to powder MSW. It was mainly attributed that the conversion of monocyclic aromatic hydrocarbons to polycyclic aromatic hydrocarbons was promoted by the longer residence time within the pellets. Meanwhile, the physicochemical properties of pyrolytic char pellets exhibited a significant heterogeneity. Specifically, the number of ordered aromatic rings of char pellet was reduced, while the order degree of carbon structure was enhanced, particularly the internal char. However, the difference magnitude between internal and external char was diminished with temperature. This was due to the higher temperature resulting in a larger surface specific area and pore volume of the char pellet, especially the internal char, thereby enhancing the pyrolysis process. Furthermore, an increase in pore volume within the char pellet improved gasification reactivity when the conversion rate > 0.4. These findings provide a reference for the pyrolysis and gasification process of MSW pellets.