Abstract For the catalytic co-pyrolysis of glucose and high-density polyethylene (HDPE) in a fixed-bed reactor, the effects of different layout schemes of feedstock and catalysts on bio-oil yield and aromatics selectivity were investigated based on the Diels-Alder reaction of furans and short-chain olefins on HZSM-5 for aromatics production. Experimental results showed that the arrangement (HDPE/HZSM-5/glucose/HZSM-5) had advantages on bio-oil yield and aromatics selectivity. A mixture of pine sawdust and MgCl2 as a glucose substitute that provided furan compounds (Furfural) reacted with short-chain olefins for aromatics production. We found that acquiring high selectivity of aromatic bio-oil from the catalytic co-pyrolysis of pine sawdust and HDPE with MgCl2 and HZSM-5 is feasible. The effects of co-pyrolysis temperature, biomass to HDPE ratio, and feedstock to catalyst ratio on bio-oil yield and chemical compositions were discussed. Notably, an appropriate ratio between the amounts of furans and short-chain olefins is necessary for increasing bio-oil yield and aromatics selectivity. Maximum oil phase product yield of 20.6% and aromatics selectivity (area %) of 95.9% were obtained when pyrolysis temperature, biomass to HDPE ratio, and feedstock to catalyst ratio were 600 ℃, 1:2, and 1:1, respectively.

中文翻译：

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生物质和高密度聚乙烯的分段催化共热解用于使用 MgCl 2 和 HZSM-5 生产芳烃

摘要 针对葡萄糖和高密度聚乙烯 (HDPE) 在固定床反应器中的催化共热解，基于 Diels-Alder 分析了不同原料和催化剂布局方案对生物油产率和芳烃选择性的影响。呋喃和短链烯烃在 HZSM-5 上反应生产芳烃。实验结果表明，该排列(HDPE/HZSM-5/葡萄糖/HZSM-5)在生物油产率和芳烃选择性方面具有优势。松木屑和 MgCl2 作为葡萄糖替代品的混合物，提供呋喃化合物（糠醛）与短链烯烃反应生产芳烃。我们发现从松木屑和 HDPE 与 MgCl2 和 HZSM-5 的催化共热解中获得高选择性的芳香生物油是可行的。共热解温度、生物质与 HDPE 比率的影响，并讨论了原料与催化剂的比例对生物油产率和化学成分的影响。值得注意的是，呋喃和短链烯烃的量之间的适当比例对于提高生物油产率和芳烃选择性是必要的。当热解温度、生物质与HDPE之比、原料与催化剂之比分别为600℃、1:2和1:1时，油相产物收率最高为20.6%，芳烃选择性（面积%）为95.9%。