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首页> 外文期刊>RSC Advances >ZrO2/SBA-15 as an efficient catalyst for the production of gamma-valerolactone from biomass-derived levulinic acid in the vapour phase at atmospheric pressure
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ZrO2/SBA-15 as an efficient catalyst for the production of gamma-valerolactone from biomass-derived levulinic acid in the vapour phase at atmospheric pressure

机译：ZrO2 / SBA-15作为在大气压下在气相中从生物质衍生的乙酰丙酸中生产γ-戊酰胺的有效催化剂

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摘要

gamma-Valerolactone is a promising renewable feedstock for the production of fuels and industrial chemicals. In this work, SBA-15 supported ZrO2 catalysts prepared by a wet impregnation method with various ZrO2 loadings ranging from 10 to 30 weight% have been studied for the production of gamma-valerolactone from levulinic acid via catalytic transfer hydrogenation and cyclization with isopropanol as a H-donor in the vapour phase at atmospheric pressure. Among the catalysts, 25 weight% ZrO2/SBA-15 has been identified as an efficient catalyst for the transfer hydrogenation, delivering 100% conversion of levulinic acid with 93% selectivity towards gamma-valerolactone. The physicochemical characteristics of these catalysts were achieved by X-ray diffraction, BET surface area, pore size distribution, UV-visible spectroscopy, temperature-programmed desorption of ammonia, SEM, TEM and ICP-OES techniques. The characterization studies divulge the presence of ZrO2 with well-dispersed acidic sites, enhanced surface area, and ease of accessibility for the active sites within the uniform pore channels, and these engendered the excellent catalytic performance with low molar ratios 1 : 7 (levulinic acid : isopropanol). Moreover, the catalyst showed sturdiness during 20 hours on-stream study.
机译：Gamma-Valerolodone是一种有前途的可再生原料，用于生产燃料和工业化学品。在这项工作中，已经研究了通过湿浸渍方法制备的SBA-15支持的ZrO2催化剂，其中通过催化转移氢化和用异丙醇环化为来自乙酰丙酮酸的γ-戊酰胺生产γ-戊内酯。 H-供体在大气压下的气相。在催化剂中，已经鉴定为转移氢化的25重量％的ZrO 2 / SBA-15作为一种有效的催化剂，其为乙酰丙烯酸的100％转化为100％，对γ-戊酮选择性为93％的选择性。这些催化剂的物理化学特性通过X射线衍射，BET表面积，孔径分布，UV可见光光学，温度编程的氨，SEM，TEM和ICP-OES技术进行了。表征研究透过ZrO2的存在，ZrO2具有良好分散的酸性位点，增强的表面积和均匀孔径内活性位点的可易于可容易性，并且这些具有低摩尔比例1：7的优异催化性能（乙酰丙酸：异丙醇）。此外，催化剂在20小时内呈现稳定性，在物流研究中。

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  • 来源
    《RSC Advances》 |2016年第24期|共10页
  • 作者

    Enumula Siva Sankar; Gurram Venkata Ramesh Babu; Kondeboina Murali; Burri David Raju; Kamaraju Seetha Rama Rao;

  • 作者单位

    Indian Inst Chem Technol CSIR Inorgan &

    Phys Chem Div Hyderabad 5000071 Andhra Pradesh India;

    Indian Inst Chem Technol CSIR Inorgan &

    Phys Chem Div Hyderabad 5000071 Andhra Pradesh India;

    Indian Inst Chem Technol CSIR Inorgan &

    Phys Chem Div Hyderabad 5000071 Andhra Pradesh India;

    Indian Inst Chem Technol CSIR Inorgan &

    Phys Chem Div Hyderabad 5000071 Andhra Pradesh India;

    Indian Inst Chem Technol CSIR Inorgan &

    Phys Chem Div Hyderabad 5000071 Andhra Pradesh India;

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  • 正文语种 eng
  • 中图分类 化学;
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