Selective conversion of furfuryl alcohol to levulinic acid by SO3H-containing silica nanoflower in GVL/H2O system
文献类型： 外文期刊
第一作者： Wang, Ruoqing
作者： Wang, Ruoqing;Qi, Xinhua;Wang, Ruoqing;Shen, Feng;Tang, Yiwei;Guo, Haixin;Smith, Richard Lee, Jr.
作者机构：
关键词： Carbohydrate; Platform chemical; Mixed-solvent; Green synthesis; Solid acid catalyst
期刊名称：RENEWABLE ENERGY （ 影响因子：6.274； 五年影响因子：5.964 ）
ISSN： 0960-1481
年卷期： 2021 年 171 卷
页码：
收录情况： SCI
摘要： Levulinic acid in high yields (90%) was produced from hemicellulose-derived furfuryl alcohol catalyzed by a uniform, dandelion-like, SO3H-modified silica nanoflower solid acid (SiNF-SO3H). The SiNF-SO3H catalyst was prepared by soft template method in microemulsion system, followed by grafting of -SH and oxidation of -SH to -SO3H at room temperature to avoid use of corrosive sulfonating agents such as concentrated H2SO4. Dandelion-like porous structures of the SiNF-SO3H catalyst provided accessible and abundant catalytic sites ensuring high activity for furfuryl alcohol conversion (10 0%). Mixed-solvent g- valerolactone-water (GVL-H2O) inhibited undesirable furfuryl alcohol polymerization reactions ensuring highly selective conversion of furfuryl alcohol to levulinic acid. Combination of catalyst and solvent system allowed achievement of the highest levulinic acid yields that have been reported to date. Both the catalyst synthesis protocol and reaction solvent (GVL-H2O) are green and sustainable. The SiNF-SO3H/ (GVL-H2O) catalytic system has application to many acid catalyzed schemes for lignocellulosic biomass conversion. (C) 2021 Elsevier Ltd. All rights reserved.
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