文献类型：期刊文献

英文题名：Migration characteristics of chlorine during pyrolysis of municipal solid waste pellets

作者：Gao, Peipei[1,2];Hu, Zichao[1,2];Sheng, Yue[1,2];Pan, Weitong[1,2];Tang, Longfei[1,2];Chen, Yihan[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 Ctr Coal Gasificat, Shanghai 200237, Peoples R China

年份：2023

卷号：172

起止页码：208

外文期刊名：WASTE MANAGEMENT

收录：;EI(收录号：20234515014976);WOS:【SCI-EXPANDED(收录号:WOS:001108775500001)】；

基金：This work was supported by the project of the National Key R & D Program of China (2022YFC3902402) , the Social Development Science and Technology Tackling Project of 2020 "Scientific and Innovative Action Plan of Shanghai" (20dz1203300) , the National Natural Science Foundation of China (22108081) and the Fundamental Research Funds of the Central University (JKB01231715) .r Action Plan of Shanghai" (20dz1203300) , the National Natural Science Foundation of China (22108081) and the Fundamental Research Funds of the Central University (JKB01231715) .

语种：英文

外文关键词：Municipal solid waste; Chlorine; Pyrolysis; Migration characteristics; Pelletization; Chlorine forms

摘要：The migration process of chlorine during municipal solid waste (MSW) pellets pyrolysis was studied in a fixed bed reactor. Distribution and speciation changes of chlorine at different pyrolysis temperatures were determined by ion chromatography (IC) and X-ray photoelectron spectroscopy (XPS) analyses. Results showed that chlorine was mainly distributed in pyrolysis char (42.36-65.29 %) and gas (26.66-35.03 %) after MSW pellets pyrolysis. With the temperature increasing, chlorine in char and tar was enriched due to the increase of chlorine release and the decrease of product yields, with chlorine concentration increasing to 3498 ppm and 1415 ppm at 800 degrees C, respectively. Results of chlorine forms analysis indicated that most of the organic-Cl in MSW was released into the volatiles during pyrolysis due to the dissociation of C-Cl. Inorganic-Cl became the dominant form of chlorine in char after pyrolysis, with the proportion increasing from 46.69 % (raw) to 61.22 % (500 degrees C), which also suggested that part of organic-Cl was converted into the inorganic-Cl. Notably, the proportions of inorganic-Cl decreased at >600 degrees C due to the migration of inorganic. In addition, the pyrolysis release behavior of chlorine was affected by the pore structure of char, which could be inhibited by the unprosperous pores in char, especially at low temperatures (<600 degrees C). These findings provided a reference for the chlorine regulation of MSW pyrolytic products.