农林废弃物与塑料共热解反应特性及动力学研究  

Co-pyrolysis Reaction Characteristics and Kinetics of Agricultural and Forestry Wastes With Plastics

作　　者：孙赫 许开立[1] 李季硕 姚锡文[1] SUN He;XU Kaili;LI Jishuo;YAO Xiwen(College of Resources&Civil Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819

出　　处：《林产化学与工业》2024年第6期73-82,共10页Chemistry and Industry of Forest Products

基　　金：国家自然科学基金资助项目(52004055);辽宁省自然科学基金资助项目(2021-MS-103)。

摘　　要：为实现固体废弃物的资源化利用以解决环境污染问题,利用热重分析仪与管式炉对松木屑(P)、高密度聚乙烯(H)及其混合物(P/H)进行热解反应特性分析,探讨P/H掺混比例和升温速率对共热解行为的影响。研究结果表明:随着高密度聚乙烯掺比的增加,样品在200~420℃内失重速率降低,共热解产生抑制作用;420~550℃内失重速率增大,促进热解反应;当高密度聚乙烯掺混比例为70%时,样品P/H(3∶7)共热解协同效应最佳;随着升温速率增大,失重曲线向高温侧移动,共热解协同效应增强。松木屑与高密度聚乙烯混合可以降低反应能垒,使混合物的实验活化能普遍低于理论活化能。气体产率变化结果表明:随着高密度聚乙烯混合比例的增加,产生的CO、CO_(2)含量降低,CH_(4)含量升高,H_(2)含量呈现先降低后升高的趋势。从气体的实验值和理论值的差值看出,共热解促进CO、CO_(2)生成,抑制H_(2)生成。In order to realize the utilization of biomass solid waste to solve the environmental pollution problems,the pyrolysis reaction characteristics of pine sawdust(P),high-density polyethylene(H)and their mixtures(P/H)were analyzed by thermogravimetric analyzer and tubular furnace,and the effects of blending ratio and heating rate on the co-pyrolysis behavior were studied.The results showed that,with the increasing in the blending ratio of HDPE,the weight loss rate decreased in the range of 200 to 420℃and the co-pyrolysis was inhibited.The weight loss rate increased from 420 to 550℃,promoting the pyrolysis reaction.The synergistic effect of co-pyrolysis was the best when the blending ratio of HDPE was 70%.With the increase of heating rate,the weight loss curve moved to the high temperature side and the synergistic effect of co-pyrolysis was enhanced.The mixing of pine sawdust and high density polyethylene could reduce the reaction energy barrier,making the experimental activation energy of the mixture generally lower than the theoretical value.The results of gas yield showed that with the increment in mixting ratio of high-density polyethylene,the contents of produced CO and CO_(2)decreased,the content of CH_(4)increased,and the content of H_(2)showed a trend of first decreasing and then increasing.And the results of gas yield showed that the co-pyrolysis process promoted the generation of CO and CO_(2),and inhibited the generation of H_(2).

关 键 词：松木屑 高密度聚乙烯 共热解 动力学 协同效应 

分 类 号：TQ35[化学工程] TK6[动力工程及工程热物理—生物能]