Hydrogen fermentation and lignin pyrolysis of wheat straw via SPORL pretreatment

IF 5.6 1区农林科学 Q1 AGRICULTURAL ENGINEERING

Industrial Crops and Products Pub Date : 2025-06-18 DOI:10.1016/j.indcrop.2025.121374

Song Li , Jiale Fu , Zhixin Jia , Yifan Zhang , Xue Chen , Lei Wang , Jungang Jiang

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Abstract

Agriculture biomass is a kind of renewable resource for renewable energy production. Current lignocellulose pretreatment methods face challenges in balancing efficient fermentation with lignin valorization. In this study, SPORL pretreatment for enhancing wheat straw fermentation and the valorization of residual lignin through pyrolysis was investigated. The results suggested that the SPORL pretreated wheat straw has a high glucose conversion rate of about 94.5 % at a pH of 5.5–6.0 after 72 h of enzymolysis, and the maximum H₂ fermentation yield was 100.42 mL/g. The residual lignin was characterized and subjected to pyrolysis, and the results showed that the maximum weight loss temperature and residual carbon rate of lignin decreased with the increase of sulfite dose. Following pyrolysis at 600 °C for 30 min, the lignin yielded approximately 22 % bio-oil and 33 % biochar. GC-MS analysis of the bio-oil showed that it contained abundant acetic acid (36 %) and phenolic compounds (20 %), indicating the potential for high-value product conversion. This study provides a comprehensive method for the conversion of wheat straw into bioenergy products, showcasing the economic and ecological benefits of integrated biomass utilization.

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SPORL预处理麦秸氢发酵及木质素热解研究

农业生物质是可再生能源生产的一种可再生资源。目前的木质纤维素预处理方法在平衡高效发酵和木质素增值方面面临挑战。本研究研究了SPORL预处理对麦秸发酵及残木质素热解的促进作用。结果表明，经SPORL预处理的麦秸在pH为5.5 ~ 6.0的条件下酶解72 h，葡萄糖转化率可达94.5 %左右，H2发酵产率最高可达100.42 mL/g。对残余木质素进行了表征和热解，结果表明，随着亚硫酸盐用量的增加，木质素的最大失重温度和残余碳率降低。在600°C热解30 min后，木质素产生约22 %的生物油和33 %的生物炭。GC-MS分析表明，该生物油含有丰富的乙酸（36 %）和酚类化合物（20 %），具有高价值产品转化的潜力。本研究为麦秸转化为生物能源产品提供了一种综合方法，展示了生物质综合利用的经济效益和生态效益。

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来源期刊

Industrial Crops and Products 农林科学-农业工程

CiteScore

9.50

自引率

8.50%

发文量

1518

审稿时长

43 days

期刊介绍： Industrial Crops and Products is an International Journal publishing academic and industrial research on industrial (defined as non-food/non-feed) crops and products. Papers concern both crop-oriented and bio-based materials from crops-oriented research, and should be of interest to an international audience, hypothesis driven, and where comparisons are made statistics performed.