应用化学 ›› 2021, Vol. 38 ›› Issue (12): 1621-1631.DOI: 10.19894/j.issn.1000-0518.210106

• 研究论文 • 上一篇    下一篇

ZrO2/生物炭纳米复合物催化转移氢化制备γ-戊内酯

张奇峰1,2, 张振杰1,2, 刘梦影1,2, 潘剑3, 禹兴海1,4*   

  1. 1(河西学院柔性复合材料应用基础研究所, 张掖 734000)
    2(河西学院化学化工学院, 张掖 734000)
    3(美国特拉华大学化学与生物分子工程系, 特拉华 涅瓦克 19716)
    4(甘肃省河西走廊特色资源利用省级重点实验室, 张掖 734000)
  • 收稿日期:2021-03-10 修回日期:2021-07-29 出版日期:2021-12-01 发布日期:2022-02-01
  • 通讯作者: *E-mail:Xinghaiyu316@gmail.com
  • 基金资助:
    国家自然科学基金 (No.21865008)、甘肃省委组织部陇原青年创新创业人才(团队)项目(No.甘组通2018-81)、甘肃省大学生创新创业训练计划项目(No.甘教高2019-7)资助

Facile and Efficient Conversion of Levulinic Acid to γ-Valerolactone over ZrO2-Biochar Nanocomposite Through Catalytic Transfer Hydrogenation

ZHANG Qi-Feng1,2, ZHANG Zheng-Jie1,2, LIU Meng-Ying1,2, PAN Jian3, YU Xing-Hai1,4*   

  1. 1(Institute of Flexible Composite Materials, Hexi University, Zhangye 734000, China)
    2(College of Chemistry and Chemical Engineering, Hexi University, Zhangye 734000, China)
    3(Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE 19716, Delaware, USA)
    4(Key Laboratory of Hexi Corridor Resources and Utilization of Gansu, Hexi University, Zhangye 734000, China)
  • Received:2021-03-10 Revised:2021-07-29 Published:2021-12-01 Online:2022-02-01
  • Supported by:
    National Natural Science Foundation of China (No.21865008), the Youth Talents in Gansu Province (Innovation and Entrepreneurship Team of Longyuan (No.GSODPPC 2018-81) and the Innovation and Entrepreneurship Training Program for College Students of Gansu Province (No.2019-7)

摘要: γ-戊内酯(GVL)是重要的生物质基平台化合物。 通过催化转移氢化反应将乙酰丙酸转化为GVL是生物质转化领域的重要反应。 本实验利用具有多级孔道结构的生物炭(BC)作为载体、氯氧化锆为前驱体,通过溶胶水热反应,制备了一种ZrO2/生物炭纳米复合物,利用红外光谱(FT-IR)、拉曼光谱(Raman)、比表面分析(BET)、粉末X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)和光电子能谱(XPS)等技术手段对其结构进行了表征,并研究了该复合物催化转移氢化乙酰丙酸制备GVL的能力。 结果表明,生物炭载体自身所具有的高比表面积和多级孔道结构,能够促进纳米ZrO2颗粒稳定分散。 在Zr4+物种和生物炭载体协同作用下,ZrO2/BC纳米复合物表现出优异的催化转移氢化活性,能够在温和条件下,快速、高效地将乙酰丙酸转化为GVL。 在最优化反应条件下,乙酰丙酸的转化率最高达94.8%,GVL选择性最高达87.5%。 此外,该复合物可通过过滤回收,循环使用5次后仍然能够保持较好的催化活性。

关键词: 催化转移氢化, 乙酰丙酸, γ-戊内酯, ZrO2/生物炭纳米复合物

Abstract: Catalytic transfer hydrogenation (CTH) of biomass-derived levulinic acid (LA) to γ-valerolactone (GVL) has attracted much interest in the field of biomass transformation. Herein, a novel ZrO2-biochar composite was developed and served as an available catalyst for LA conversion into GVL via a Meerwein-Ponndorf-Verley (MPV) reaction, known as the typical CTH process. The catalyst was prepared by a sol-hydrothermal method, and its structure was characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), N2 adsorption-desorption, energy dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared (FT-IR) spectroscopy. It is found that the high surface area and hierarchical structure of biochar matrix facilitates the dispersion of the zirconium oxide active species on it, and the catalytic activity for LA conversion is further promoted in the presence of isopropanol as hydrogen donors. The effects of catalyst loading, reaction temperature and time are examined, and the highest LA conversion reaches 94.8% with 87.5% GVL selectivity at 150 ℃ for 16 h with the catalyst loading of 19.8%. Afterwards, the catalysts are collected by centrifugation and reused for five times without the obvious loss of activity. Therefore, this eco-friendly catalyst is favorable for efficient transformation from LA to GVL due to its merits of cost-effectiveness and easy availability.

Key words: Catalyst transfer hydrogenation, Levulinic acid, γ-Valerolactone, Zirconium oxide, Biochar support

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