优化酸性位点控制，通过 HSiW/MCM-41 催化剂将生物质糖选择性转化为糠醛和乙酰丙酸

IF 5.8 2区生物学 Q1 AGRICULTURAL ENGINEERING

Biomass & Bioenergy Pub Date : 2024-06-14 DOI:10.1016/j.biombioe.2024.107275

Wenxuan Hu , Haocheng Xu , Zhengxiong Zhang , Yanfeng Duan , Xuebin Lu , Lefu Lu , Chuanling Si , Yutao Peng , Xiaoyun Li

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引用次数: 0

摘要

糠醛和乙酰丙酸是有价值的平台化合物，可通过酸催化转化糖类生产。通过湿浸渍法成功制备了不同硅钨酸含量（20 wt%-50 wt%）的改性 MCM-41，以调节布氏酸和路易斯酸的比例。在这些催化剂中，40 wt% HSiW/MCM-41 具有较高的酸性位点密度（布氏酸 59.35 μmol/g，路易斯酸 33.69 μmol/g），暴露了最多的酸性位点，布氏酸与路易斯酸的比例达到 1.76，因此表现出优异的催化活性。在 40 wt% HSiW/MCM-41 催化下，生物质基糖的转化率高达 99.01%，糠醛的最高产率可达 56.75%，乙酰丙酸的产率可达 18.88%。这项研究为开发生产生物质衍生化合物的高效、可持续催化系统提供了新的见解。

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Optimizing acidic site control for selective conversion of biomass-based sugar to furfural and levulinic acid through HSiW/MCM-41 catalyst

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Optimizing acidic site control for selective conversion of biomass-based sugar to furfural and levulinic acid through HSiW/MCM-41 catalyst

Furfural and levulinic acid are valuable platform compounds that can be produced by acid catalyzed conversion of sugars. Modified MCM-41 with different contents of silicotungstic acid (20 wt%-50 wt%) was successfully prepared via a wet impregnation method in order to regulate the ratio of Brønsted acid to Lewis acid. Among these catalysts, 40 wt% HSiW/MCM-41 with superior acid site density (Brønsted acid 59.35 μmol/g, Lewis acid 33.69 μmol/g) showed excellent catalytic activity as it exposed the most acidic sites and the ratio of Brønsted acid to Lewis acid reached 1.76. The conversion of biomass-based sugar was as high as 99.01 %, the maximum yield of furfural could reach 56.75 %, and the yield of levulinic acid could reach 18.88 % catalyzed by 40 wt% HSiW/MCM-41. This study provided new insights into the development of efficient and sustainable catalytic systems for the production of biomass-derived compounds.

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来源期刊

Biomass & Bioenergy 工程技术-能源与燃料

CiteScore

11.50

自引率

3.30%

发文量

258

审稿时长

60 days

期刊介绍： Biomass & Bioenergy is an international journal publishing original research papers and short communications, review articles and case studies on biological resources, chemical and biological processes, and biomass products for new renewable sources of energy and materials. The scope of the journal extends to the environmental, management and economic aspects of biomass and bioenergy. Key areas covered by the journal: • Biomass: sources, energy crop production processes, genetic improvements, composition. Please note that research on these biomass subjects must be linked directly to bioenergy generation. • Biological Residues: residues/rests from agricultural production, forestry and plantations (palm, sugar etc), processing industries, and municipal sources (MSW). Papers on the use of biomass residues through innovative processes/technological novelty and/or consideration of feedstock/system sustainability (or unsustainability) are welcomed. However waste treatment processes and pollution control or mitigation which are only tangentially related to bioenergy are not in the scope of the journal, as they are more suited to publications in the environmental arena. Papers that describe conventional waste streams (ie well described in existing literature) that do not empirically address ''new'' added value from the process are not suitable for submission to the journal. • Bioenergy Processes: fermentations, thermochemical conversions, liquid and gaseous fuels, and petrochemical substitutes • Bioenergy Utilization: direct combustion, gasification, electricity production, chemical processes, and by-product remediation • Biomass and the Environment: carbon cycle, the net energy efficiency of bioenergy systems, assessment of sustainability, and biodiversity issues.