改性HZSM-5催化玉米秸秆与HDPE共热解制轻质芳烃  

MODIFIED HZSM-5 CATALYZED CO-PYROLYSIS OF CORN STOVER AND HDPE TO BTEXN

作　　者：李延吉[1] 赵明 李明泽 宋瑞雯 Li Yanji;Zhao Ming;Li Mingze;Song Ruiwen(Clean Energy Key Laboratory of Liaoning,Shenyang Aerospace University,Shenyang 110136,China)

机构地区：[1]沈阳航空航天大学清洁能源利用辽宁省重点实验室,沈阳110136

出　　处：《太阳能学报》2023年第4期238-246,共9页Acta Energiae Solaris Sinica

基　　金：沈阳市科技计划(21108926);辽宁省教育厅项目(L201707)。

摘　　要：为提高生物质与聚乙烯共热解中苯、甲苯、乙苯、二甲苯和萘(简称)BTEXN和轻烯烃的产量,同时抑制C^(+)_(21)蜡的形成,通过TG-MS/FTIR和Py-GC/MS探究催化共热解中HZSM-5和改性HZSM-5对玉米秸秆和HDPE相互作用的影响,并对BTEXN进行定量分析。结果表明,在HZSM-5的催化共热解中,HZSM-5可促进玉米秸秆与HDPE之间的相互反应,芳烃和轻烃产率增加。相比HZSM-5,在改性HZSM-5的催化共热解中,改性HZSM-5可促进轻烯烃、C_(5)-C_(11)脂肪烃和芳烃的析出,并抑制C^(+)_(21)蜡的形成。Cu、Fe和Ce改性可促进单环芳烃的形成,同时提高BTEXN产量,相比HZSM-5分别提高20.99、25.43和20.89 mg/g,而P改性会抑制BTEXN形成。对于形成芳烃的Diels-Alder反应,Fe和Ce改性表现出较强的催化效果,而Cu改性对烃池反应催化效果较强。此外积碳分析表明,Fe和P改性具有较强的抗积碳能力。To improve the yield of BTEXN and light olefins in co-pyrolysis of biomass with polyethylene while inhibiting the formation of C~+_(21) waxes,the effects of HZSM-5 and modified HZSM-5 in catalytic co-pyrolysis on the interaction between corn stover and HDPE are investigated by TG-MS/FTIR and Py-GC/MS.The results show that in the catalytic co-pyrolysis of HZSM-5,HZSM-5 promotes the mutual reaction between corn stover and HDPE,and the aromatic and light hydrocarbon yields increase.Compared with HZSM-5,in the catalytic co-pyrolysis of modified HZSM-5,modified HZSM-5 promotes the precipitation of light olefins,C_5-C_(11) aliphatic hydrocarbons and aromatics,and inhibits the formation of C~+_(21) waxes.Cu,Fe and Ce modifications promote monocyclic aromatic hydrocarbon formation while increasing BTEXN yield by 20.99 mg/g,25.43 mg/g and 20.89 mg/g respectively,compared to HZSM-5.Inversely,P modification inhibits BTEXN formation.For the Diels-Alder reaction,which forms aromatics,Fe and Ce modifications show stronger catalytic effect,while Cu modifications are more effective in catalyzing the hydrocarbon pool reaction.In addition,carbon accumulation analysis show that Fe and P modifications have stronger resistance to carbon accumulation.

关 键 词：生物质 高密度聚乙烯类 热解 BTEXN HZSM-5 

分 类 号：X705[环境科学与工程—环境工程]