文献类型：期刊文献

英文题名：Improvement of Aromatics Selectivity from Catalytic Pyrolysis of Low-Density Polyethylene with Metal-Modified HZSM-5 in a CO2 Atmosphere

作者：Zhou, Shichang[1];Li, Peng[1];Pan, Helin[1];Zhang, Yayun[2]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Key Lab Multiphase Mat Chem Engn, Shanghai 200237, Peoples R China

年份：2022

卷号：61

期号：31

起止页码：11407

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20223412611869);WOS:【SCI-EXPANDED(收录号:WOS:000834341900001)】；

基金：? ACKNOWLEDGMENTS This work was supported by the National Natural Science Foundation of China (Grant Number 22008073) .

语种：英文

外文关键词：Aromatic hydrocarbons - Aromatization - Catalysis - Catalyst selectivity - Elastomers - Greenhouse gases - Plastic recycling - Polyethylenes - Pyrolysis - Zeolites

摘要：Catalytic pyrolysis has been emerging as a promising strategy to tackle solid pollution induced by waste plastics, whereas achieving high selectivity of targeted products like valuable light aromatics remains a huge challenge. In this work, a novel protocol that combing waste plastic conversion and greenhouse gas CO2 utilization was proposed for the first time. Different metal (Fe, Ni, Co, Mn, Ag, and Cu)-modified HZSM-5 zeolites were fabricated and then used as catalysts for the catalytic pyrolysis of low-density polyethylene (LDPE) with CO2 as the reaction atmosphere. The introduction of CO2 enhanced the selectivity of aromatic hydrocarbons from LDPE catalytic pyrolysis in comparison with a N-2 atmosphere, and a high liquid yield of more than 70% containing aromatic hydrocarbons, alkanes, and olefins was obtained with CO2 catalytic conversion to CO over a nickel-modified HZSM-5 catalyst. In addition, the total selectivity of aromatics was 56.82% with that of benzene, toluene, ethylbenzene, and xylene (BTEX) being 43.63% at 550 ?. Compared with untreated HZSM-5, the metal-modified HZSM-5 catalyst also enhanced anticoking performance during catalytic reactions with the assistance of active CO2 molecules. Besides, the involved catalytic reaction mechanism was also interpreted. The current work may offer a fresh route to the chemical recycling of waste plastics with simultaneous green CO2 reutilization, advancing the development of catalytic conversion of hydrogen-rich solid waste into value-added products.