Microwave pyrolysis of sewage sludge for bio-oil production: Effects of organic components and mechanisms

IF 7.2 2区工程技术 Q1 CHEMISTRY, APPLIED Fuel Processing Technology Pub Date : 2024-01-01 DOI:10.1016/j.fuproc.2023.108023

Yanjun Liu , Yanting Liu , Renjie Chen , Hongtao Wang , Hang Gao , Yongyang Wang , Jianbing Wang

{"title":"Microwave pyrolysis of sewage sludge for bio-oil production: Effects of organic components and mechanisms","authors":"Yanjun Liu , Yanting Liu , Renjie Chen , Hongtao Wang , Hang Gao , Yongyang Wang , Jianbing Wang","doi":"10.1016/j.fuproc.2023.108023","DOIUrl":null,"url":null,"abstract":"<div><p>The microwave pyrolysis (MWP) of sewage sludge (SS) was conducted to investigate the impact of the organic composition of SS on the yield and composition of the derived bio-oil. The experiments were conducted in a microwave oven at 900 °C with a heating rate of 50 °C/min and achieved the product yield of 43.10 ± 2.23% bio-oil, 48.07 ± 1.26% bio-char, 8.83 ± 1.65% bio-gas. The chemical composition of bio-oil was investigated using gas chromatography–mass spectrometry and 145 species were identified. Protein and lipid contents in SS are the primary source of bio-oil yield, while bio-gas are predominantly derived from lignocellulosic materials. The unique non-thermal effects of microwaves can facilitate the ring-opening of small cycloalkanes to form straight olefins through hydrogen transfer reactions. Additionally, they can promote aldol condensation reactions, Pinacol rearrangements, and methoxy cleavage to form phenolic and aromatic structures with methyl groups. Furthermore, microwaves can aid in the dehydration, condensation, and cyclization reactions of amino acids to produce N-heterocycles while also facilitating lipid depolymerization into fragments for Diels–Alder cyclization. The results of this study will be beneficial for deeply understanding reactant characteristics and the reaction process during the MWP of SS.</p></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"253 ","pages":"Article 108023"},"PeriodicalIF":7.2000,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0378382023003715/pdfft?md5=d54765e8ab40b4c0e8e14e51d41f9fd0&pid=1-s2.0-S0378382023003715-main.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Fuel Processing Technology","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0378382023003715","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}

引用次数: 0

Abstract

The microwave pyrolysis (MWP) of sewage sludge (SS) was conducted to investigate the impact of the organic composition of SS on the yield and composition of the derived bio-oil. The experiments were conducted in a microwave oven at 900 °C with a heating rate of 50 °C/min and achieved the product yield of 43.10 ± 2.23% bio-oil, 48.07 ± 1.26% bio-char, 8.83 ± 1.65% bio-gas. The chemical composition of bio-oil was investigated using gas chromatography–mass spectrometry and 145 species were identified. Protein and lipid contents in SS are the primary source of bio-oil yield, while bio-gas are predominantly derived from lignocellulosic materials. The unique non-thermal effects of microwaves can facilitate the ring-opening of small cycloalkanes to form straight olefins through hydrogen transfer reactions. Additionally, they can promote aldol condensation reactions, Pinacol rearrangements, and methoxy cleavage to form phenolic and aromatic structures with methyl groups. Furthermore, microwaves can aid in the dehydration, condensation, and cyclization reactions of amino acids to produce N-heterocycles while also facilitating lipid depolymerization into fragments for Diels–Alder cyclization. The results of this study will be beneficial for deeply understanding reactant characteristics and the reaction process during the MWP of SS.

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

微波热解污水污泥以生产生物油：有机成分和机制的影响

研究人员对污水污泥（SS）进行了微波热解（MWP），以探讨污水污泥的有机成分对衍生生物油的产量和成分的影响。实验在微波炉中进行，温度为 900 °C，加热速度为 50 °C/分钟，产物产率为 43.10 ± 2.23% 生物油、48.07 ± 1.26% 生物炭、8.83 ± 1.65% 生物气体。利用气相色谱-质谱法研究了生物油的化学成分，确定了 145 种生物油。SS 中的蛋白质和脂质含量是生物油产量的主要来源，而生物气体则主要来自木质纤维素材料。微波独特的非热效应可以通过氢转移反应促进小环烷烃开环形成直链烯烃。此外，微波还能促进醛醇缩合反应、频哪醇重排和甲氧基裂解，从而形成带有甲基的酚醛和芳香结构。此外，微波还能帮助氨基酸脱水、缩合和环化反应，生成 N-杂环，同时还能促进脂质解聚成片段，用于 Diels-Alder 环化反应。这项研究的结果将有助于深入了解 SS 的 MWP 期间的反应物特征和反应过程。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

来源期刊

Fuel Processing Technology 工程技术-工程：化工

CiteScore

13.20

自引率

9.30%

发文量

398

审稿时长

26 days

期刊介绍： Fuel Processing Technology (FPT) deals with the scientific and technological aspects of converting fossil and renewable resources to clean fuels, value-added chemicals, fuel-related advanced carbon materials and by-products. In addition to the traditional non-nuclear fossil fuels, biomass and wastes, papers on the integration of renewables such as solar and wind energy and energy storage into the fuel processing processes, as well as papers on the production and conversion of non-carbon-containing fuels such as hydrogen and ammonia, are also welcome. While chemical conversion is emphasized, papers on advanced physical conversion processes are also considered for publication in FPT. Papers on the fundamental aspects of fuel structure and properties will also be considered.