负载金属型固体酸催化木质纤维生物质定向转化为乙酰丙酸甲酯  

Directional conversion of lignocellulosic biomass to methyl levulinate over supported metal solid acid

作　　者：何世坤 张文豪 冯君锋 潘晖[1,2] HE Shikun;ZHANG Wenhao;FENG Junfeng;PAN Hui(College of Chemical Engineering,Nanjing Forestry University,Nanjing 210037,Jiangsu,China;Jiangsu Co-Innovation Centre of Efficient Processing and Utilization of Forest Resources,Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-forest Biomass,Nanjing Forestry University,Nanjing 210037,Jiangsu,China)

机构地区：[1]南京林业大学化学工程学院,江苏南京210037 [2]南京林业大学江苏省林业资源高效加工利用协同创新中心,江苏省高校农林生物质化学与利用国家重点实验室培育建设点,江苏南京210037

出　　处：《化工进展》2024年第6期3042-3050,共9页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(32101469);广西林产化学与工程重点实验室(国家民委重点实验室)开放基金课题(GXFK2204)。

摘　　要：木质纤维生物质是一种存量丰富、绿色的资源,通过利用木质纤维生物质制备高值化的液体燃料和化学品,不但可以缓解社会对化石燃料需求的压力,而且可以改善生态环境,助力“双碳”目标。本研究制备了多种金属负载型固体酸催化剂,用于催化生物质碳水化合物高效转化为乙酰丙酸甲酯。通过表征手段研究所制备催化剂的特性,发现其具备双功能特性(B酸和L酸活性中心)。其中,AlCl_(3)作为L酸供应体,负载到催化剂表面,催化性能最佳。研究反应温度和时间等因素对葡萄糖、木糖同步定向转化为乙酰丙酸甲酯的影响发现:在复合溶剂二甲氧基甲烷/甲醇的质量比1∶1、反应温度200℃、反应时间120min的条件下性能最好,原料的转化率达到了100%,乙酰丙酸/酯的最大收率达到了24.96%。Lignocellulosic biomass is an abundant and green resources.Preparation of high added-value liquid fuels and chemicals from lignocellulosic biomass can alleviate society’s demand for fossil fuels and improve the ecological environment,and thus contribute to the“dual-carbon”objective.In this study,a variety of metal-supported solid acid catalysts were prepared for conversion of biomass carbohydrates to methyl levulinate.The prepared catalysts were characterized and were found to possess bifunctional properties(B-and L-acid active centers).The catalyst with AlCl_(3) loaded on surface to provide L-acid showed the best catalytic performance.The effects of different factors such as reaction temperature and time on the simultaneous directional conversion of glucose and xylose to methyl levulinate were investigated in detail.A raw material conversion of 100%and levulinic acid/ester yield of 24.96%could be obtained with the co-solvent of dimethoxy-methane/methanol(1∶1 mass ratio)at 200℃for 2h.

关 键 词：木质纤维生物质 催化剂 复合溶剂 生物燃料 酯化 

分 类 号：TQ032[化学工程]