木质素与高密度聚乙烯共热解特性研究  

Study on the Co-Pyrolysis Characteristics of Lignin and High-Density Polyethylene

作　　者：苏德仁 王亚琢[2,3,5] 范洪刚 顾菁[2,3,5] SU De-ren;WANG Ya-zhuo;FAN Hong-gang;GU Jing(Guangdong Fengle Energy Technology Co.,Ltd.,Guangzhou 511300,China;Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou 510640,China;Dongguan Zhongke Mianyuan Environmental Protection Technology Co.,Ltd.,Dongguan 523000,Guangdong,China;University of Chinese Academy of Sciences,Beijing 100049,China;Foshan Kehengbo Environmental Protection Technology Co.,Ltd.,Foshan 528225,Guangdong,China)

机构地区：[1]广东丰乐能源科技有限公司,广州511300 [2]中国科学院广州能源研究所,广州510640 [3]东莞中科面源环保科技有限公司,广东东莞523000 [4]中国科学院大学,北京100049 [5]佛山市科恒博环保技术有限公司,广东佛山528225

出　　处：《新能源进展》2020年第6期462-469,共8页Advances in New and Renewable Energy

基　　金：国家自然科学基金项目(51976223);南方海洋科学与工程广东省实验室(广州)人才团队引进重大专项项目(GML2019ZD0101);东莞市引进创新创业领军人才项目。

摘　　要：生物质与塑料共热解是一种非常有效的生物质利用方法之一,但由于生物质结构的复杂性,共热解过程的机理尚不明晰。木质素是生物质的主要组分之一,本文通过热重−质谱联用仪和裂解器−气相色谱质谱仪研究其与高密度聚乙烯共热解过程,获取共热解特性及热解产物分布特性,以揭示共热解过程机制。结果显示,木质素与高密度聚乙烯共热解过程存在协同效应,使得热解失重速率加快,热解固体残渣含量减少。共热解过程有利于CH4、H2O、CO和C2H4的生成,抑制CO2的生成。同时,酚类、醇类和糖类等含氧化合物产量减少,烷烃和烯烃类化合物产量增加。结果表明,共热解过程会发生氢转移现象,氢与木质素衍生热解产物结合发生反应,从而抑制含氧化合物的生成,促进烷烃类和烯烃类化合物生成。The co-pyrolysis of biomass and plastics is one of the most effective methods of biomass utilization,while the mechanism of the co-pyrolysis process is still unclear due to the complexity of the biomass structure.In this work,the co-pyrolysis process of lignin(one of the main components of biomass)and high-density polyethylene was studied by thermogravimetric mass spectrometer and pyrolysis-gas chromatography coupled to mass spectrometer.The co-pyrolysis characteristics and pyrolysis product distribution were obtained,and the mechanism of co-pyrolysis process was also proposed.The results showed that a synergistic effect existed in the co-pyrolysis process of lignin and high-density polyethylene,which accelerated the rate of weight loss and reduced the content of pyrolysis solid residues.And the co-pyrolysis process was conducive to the formation of CH4,H2O,CO and C2H4,while inhibited the formation of CO2.At the same time,the yields of oxygenated compounds such as phenols,alcohols and sugars decreased,and the yields of alkanes and alkenes increased.The above results indicated that hydrogen transfer could occur in the co-pyrolysis process,and hydrogen would react with the lignin-derived pyrolysis products,thereby inhibiting the generation of oxygenated compounds and promoting the production of alkanes and alkenes.

关 键 词：木质素 高密度聚乙烯 共热解 协同效应 

分 类 号：TK261[动力工程及工程热物理—动力机械及工程] X705[环境科学与工程—环境工程]