SusChEM: Continuous Flow Lignin Deconstruction in Supercritical Solvent Mixtures and Conversion to Renewable Chemicals

SusChEM：超临界溶剂混合物中的连续流动木质素解构以及转化为可再生化学品

• 批准号: 1706046
• 负责人: Jean-Philippe Tessonnier
• 金额: $ 30万
• 依托单位: Iowa State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-07-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1706046&HistoricalAwards=false
• 关键词: SusChEM; Continuous; Flow; Lignin; Deconstruction

Lignocellulosic biomass from agricultural waste and non-edible plants represents an abundant, inexpensive, and renewable source of carbon for the production of bio-based fuels, chemicals, and polymers. To be truly sustainable, new conversion processes that favor the use of green solvents, non-precious metal catalysts, and offer optimal biomass utilization need to be explored. The research objective of this project is to investigate the deconstruction of lignin, an underutilized biopolymer which accounts for up to 30% of lignocellulosic biomass, and its conversion to high value-added bio-based phenolic precursors for the industrial production of drugs, cosmetics, flavoring agents, and epoxy resins. The process combines the depolymerization of lignin in supercritical solvents and the catalytic upgrading of the resulting fragments to desired bio-based products.The project will explore new processes to convert lignin, an industrial waste product that is currently burnt as low value boiler fuel, to high value-added chemicals of industrial significance. Specifically, the deconstruction and fractionation of industrial lignin in flow reactors using supercritical solvent mixtures will be studied in order to understand the involved mechanisms and identify conditions that favor high selectivity, thus benefiting the economics of the conversion process and the environment by reducing waste. High value building blocks such as p-coumaric acid and ferulic acid will be recovered while fractions with lower value monomers and oligomers will be further converted over nanostructured catalysts to bio-based phenolic platform chemicals. The outreach program primarily targets grades 7-12 high school teachers with the objective of generating excitement and interest in pursuing careers in STEM fields among their students.

来自农业废物和非食用植物的木质纤维素生物质是用于生产生物基燃料、化学品和聚合物的丰富、廉价且可再生的碳源。为了真正实现可持续发展，需要探索有利于使用绿色溶剂、非贵金属催化剂并提供最佳生物质利用的新转化工艺。该项目的研究目标是研究木质素（一种未充分利用的生物聚合物，占木质纤维素生物质的 30%）的解构，以及将其转化为高附加值的生物基酚类前体，用于药物、化妆品、调味剂和环氧树脂的工业生产。该工艺结合了超临界溶剂中木质素的解聚以及将所得碎片催化升级为所需的生物基产品。该项目将探索将木质素（一种目前作为低价值锅炉燃料燃烧的工业废品）转化为具有工业意义的高附加值化学品的新工艺。 具体来说，将研究使用超临界溶剂混合物在流动反应器中解构和分馏工业木质素，以了解所涉及的机制并确定有利于高选择性的条件，从而通过减少废物来有利于转化过程的经济性和环境。对香豆酸和阿魏酸等高价值结构单元将被回收，而含有较低价值单体和低聚物的馏分将通过纳米结构催化剂进一步转化为生物基酚类平台化学品。 该外展计划主要针对 7 至 12 年级的高中教师，目的是激发学生对 STEM 领域职业的兴奋和兴趣。

项目成果

Low-pressure two-stage catalytic hydropyrolysis of lignin and lignin-derived phenolic monomers using zeolite-based bifunctional catalysts

• DOI: 10.1016/j.jaap.2020.104779
• 发表时间: 2020-03
• 期刊: Journal of Analytical and Applied Pyrolysis
• 影响因子: 6
• 作者: Yuan Xue;Ashokkumar M. Sharma;Jiajie Huo;Wangda Qu;Xianglan Bai

Insights into Structural Changes of Lignin toward Tailored Properties during Deep Eutectic Solvent Pretreatment

• DOI: 10.1021/acssuschemeng.0c01361
• 发表时间: 2020-07-06
• 期刊: ACS SUSTAINABLE CHEMISTRY & ENGINEERING
• 影响因子: 8.4
• 作者: Chen, Zhu;Bai, Xianglan;Wan, Caixia
• 通讯作者: Wan, Caixia

One-pot selective conversion of lignocellulosic biomass into furfural and co-products using aqueous choline chloride/methyl isobutyl ketone biphasic solvent system

• DOI: 10.1016/j.biortech.2019.121708
• 发表时间: 2019-10-01
• 期刊: BIORESOURCE TECHNOLOGY
• 影响因子: 11.4
• 作者: Chen, Zhu;Bai, Xianglan;Wan, Caixia
• 通讯作者: Wan, Caixia