Efficient conversion of cellulose to furfural with carbon-based solid acid catalyst in pure GVL

IF 3.5 4区 工程技术 Q3 ENERGY & FUELS
Yihui Li, Zhaoping Zhong, Wei Wang, Qihang Ye, Xiang Zheng, Hengyuan Liu, Zekun Yun
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Abstract

The valorization of cellulose in lignocellulose into high-value products is a crucial step in biorefinery processes. In this study, FeCl3·6H2O was impregnated and supported on a carbon-based substrate, followed by carbonization and sulfonation to prepare the composite carbon-based solid acid. The resulting composite carbon-based solid acid was used as the catalyst, while γ-valerolactone, a lactone solvent, served as the reaction medium for producing furfural as the product from cellulose. When using this catalytic system to treat cellulose, under appropriate reaction temperature and residence time, the yield of furfural reached 75.26%, while the conversion rate of cellulose was 99.8%. Characterization techniques including SEM, EDS, XRD, XPS, and Py-FTIR were employed to confirm that the composite carbon-based solid acid possessed Brønsted acid sites, Lewis acid sites, and -Cl active groups, all of which exhibited excellent catalytic activity and selectivity towards furfural production. Furthermore, the synergistic effect between the catalytic activity of the three active groups in the carbon-based solid acid and the inhibitory effect of the nonpolar solvent on side reactions contributed to the outstanding performance of the catalytic system. And this study proposes a possible reaction pathway for the conversion of cellulose to furfural. This research provides an efficient pathway for the valorization of cellulose and holds significance in furfural production and biomass conversion.

Graphical abstract

碳基固体酸催化剂在纯GVL中纤维素高效转化为糠醛
木质纤维素中的纤维素增值为高价值产品是生物精炼过程中的关键步骤。在本研究中,FeCl3·6H2O浸渍并负载在碳基基质上,然后进行碳化和磺化,制备复合碳基固体酸。以合成的复合碳基固体酸为催化剂,以内酯溶剂γ-戊内酯为反应介质,以纤维素为原料制备糠醛。采用该催化体系处理纤维素,在适宜的反应温度和停留时间下,糠醛的收率可达75.26%,纤维素的转化率为99.8%。采用SEM、EDS、XRD、XPS和Py-FTIR等表征技术,证实复合碳基固体酸具有Brønsted酸位、Lewis酸位和-Cl活性基团,对糠醛的生成具有优异的催化活性和选择性。此外,碳基固体酸中三个活性基团的催化活性与非极性溶剂对副反应的抑制作用之间的协同效应是催化体系表现优异的原因。本研究提出了纤维素转化为糠醛的可能反应途径。该研究为纤维素增值提供了一条有效途径,对糠醛生产和生物质转化具有重要意义。图形抽象
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来源期刊
Biomass Conversion and Biorefinery
Biomass Conversion and Biorefinery Energy-Renewable Energy, Sustainability and the Environment
CiteScore
7.00
自引率
15.00%
发文量
1358
期刊介绍: Biomass Conversion and Biorefinery presents articles and information on research, development and applications in thermo-chemical conversion; physico-chemical conversion and bio-chemical conversion, including all necessary steps for the provision and preparation of the biomass as well as all possible downstream processing steps for the environmentally sound and economically viable provision of energy and chemical products.
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