燃料化学学报（中英文）2025，Vol.53Issue(1)：82-95,中插1-中插4,18.DOI:10.1016/S1872-5813(24)60484-6
CaO/HZSM-5复合催化剂调控水稻秸秆和PVC共热解产物的协同作用研究
Synergistic effect of CaO/HZSM-5 composite catalyst in regulating co-pyrolysis products of rice straw and PVC
摘要
Abstract
Co-pyrolysis of biomass and waste plastics is one of the potential technologies to achieve the resourceful utilization of both,not only to prepare high value-added hydrocarbon-rich bio-oil,but also to achieve clean resourceful utilization of wastes and reduce environmental pollution.However,the products complexity limits its further application of co-pyrolysis technology.In this study,rice straw(RS),an agricultural waste,and polyvinyl chloride plastic(PVC)were used to investigate the individual and co-pyrolysis characteristics of them by thermogravimetric-mass spectrometry(TG-MS)and pyrolysis-gas chromatography/mass spectrometry(Py-GC/MS),and the synergistic regulation law of the pyrolysis products by CaO and HZSM-5 composite catalyst.The results show that interactions exist between PVC and RS during the co-pyrolysis process,which promotes the production of aromatic compounds.The relative content of hydrocarbon compounds in tar is as high as 66.78%.The relative content of aromatics reaches 64.17%.Compared with RS pyrolysis,content of oxygenated compounds in the co-pyrolysis tar fraction decreases by 62.05%,which effectively improves oxidative stability of the tar.CaO/HZSM-5 composite catalyst shows better light aromatic selectivity compared with the individual one.The relative content of C4-C10 hydrocarbons in the pyrolysis tar increases by 2.81%and 5.06%,respectively.Under the synergistic effect of CaO/HZSM-5 composite catalyst,relative content of monocyclic aromatic hydrocarbons in the tar is 34.34%,which is larger than the theoretical calculated value of 33.03%.And relative content of PAHs is 28.21%,which is smaller than the theoretical value of 31.22%.In addition,the CaO/HZSM-5 composite catalyst promotes immobilisation of Cl in the form of chlorides such as CaCl2 in the char,which significantly reduces the gas-phase release of elemental Cl.关键词
生物质/PVC/热解/CaO/HZSM-5复合催化剂/协同作用Key words
biomass/polyvinyl chloride/pyrolysis/CaO/HZSM-5 composite catalysts/synergistic effect分类
化学化工引用本文复制引用
王彩云,王焦飞,张玉洁,柯梅容,宋旭东,苏暐光,白永辉,吕鹏,于广锁..CaO/HZSM-5复合催化剂调控水稻秸秆和PVC共热解产物的协同作用研究[J].燃料化学学报（中英文）,2025,53(1):82-95,中插1-中插4,18.基金项目
The project was supported by Natural Science Foundation of Ningxia(2023AAC03057),the Natural Science Foundation Innovation Group of Ningxia(2023AAC01001),National Natural Science Foundation of China(22168032,22008126).宁夏自然科学基金(2023AAC03057),气流床煤气化协同处置工业危废应用基础研究(2023AAC01001)和国家自然科学基金(22168032,22008126)资助 （2023AAC03057）
