Co-pyrolysis of neem sawdust and high-density polyethylene towards aromatic-rich bio-oil: Significance of zeolite mesopores

IF 6.7 1区工程技术 Q2 ENERGY & FUELS

Fuel Pub Date : 2024-11-16 DOI:10.1016/j.fuel.2024.133724

Jingyue Wang , Liu Wu , Fanfan Huang , Jie Liang

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引用次数: 0

Abstract

Co-pyrolysis of biomass and plastic was conducive to aromatics-rich bio-oil production, though the significance of zeolite mesopores in co-pyrolysis was still lacking and required further investigation. Herein, a conventional ZSM-5 and its two mesoporous deviants (hollow HS-ZSM-5 and core–shell hierarchical ZSM-5@SBA-15) were synthesized and utilized as catalysts in the co-pyrolysis of neem sawdust (NS) and high-density polyethylene (HDPE). Results showed that compared to ZSM-5, both the mesoporous zeolites enhanced aromatics production. And HS-ZSM-5 with an interior mesoporous cavity performed better in improving the monocyclic aromatic hydrocarbons (MAHs) fraction. An optimization of co-pyrolysis conditions (e.g., HDPE percentage, catalyst loading, co-pyrolysis temperature) further improved the MAHs selectivity to 33.8 area%. The synergy between NS and HDPE over mesoporous zeolites was also compared. While the aromatization between short-chain olefins was dominant in aromatics production over ZSM-5@SBA-15, the Diels–Alder reaction between NS-derived furans and HDPE-derived olefins contributed more in that over HS-ZSM-5.

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楝树锯屑和高密度聚乙烯共同热解产生富含芳香烃的生物油：沸石介孔的意义

生物质和塑料的共热解有利于生产富含芳烃的生物油，但沸石介孔在共热解中的意义仍有待进一步研究。本文合成了传统的 ZSM-5 及其两种介孔异构体（空心 HS-ZSM-5 和核壳分层 ZSM-5@SBA-15），并将其用作楝树锯屑（NS）和高密度聚乙烯（HDPE）共热解的催化剂。结果表明，与 ZSM-5 相比，两种介孔沸石都能提高芳烃的产量。而具有内部介孔空腔的 HS-ZSM-5 在提高单环芳烃（MAHs）馏分方面表现更好。优化共热解条件（如高密度聚乙烯比例、催化剂负载、共热解温度）可进一步将 MAHs 选择性提高到 33.8%。此外，还比较了介孔沸石上的 NS 和 HDPE 的协同作用。在 ZSM-5@SBA-15 上，短链烯烃之间的芳香化反应在芳烃生产中占主导地位，而在 HS-ZSM-5 上，NS 衍生的呋喃和 HDPE 衍生的烯烃之间的 Diels-Alder 反应对芳烃生产的贡献更大。

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来源期刊

Fuel 工程技术-工程：化工

CiteScore

12.80

自引率

20.30%

发文量

3506

审稿时长

64 days

期刊介绍： The exploration of energy sources remains a critical matter of study. For the past nine decades, fuel has consistently held the forefront in primary research efforts within the field of energy science. This area of investigation encompasses a wide range of subjects, with a particular emphasis on emerging concerns like environmental factors and pollution.