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Supported cobalt catalysts for the selective hydrogenation of ethyl levulinate to various chemicals

机译：支持钴催化剂，用于选择性氢化乙酸乙烯酸乙酯与各种化学品

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摘要

A highly active and selective cobalt catalyst was developed for the hydrogenation of biomass-derived ethyl levulinate (EL) to gamma-valerolactone (GVL), ethyl 4-hydroxypentanoate (EHP), 1,4-pentanediol (1,4-PDO) and 2-methyltetrahydrofuran (2-MTHF), which are considered to be value-added chemicals and important biofuels. The effects of reaction time, reaction temperature, catalyst amount and solvent on its catalytic performance were investigated. In addition, the reaction pathway was studied as well. It was found that the selectivity of GVL, 1,4-PDO and 2-MTHF on Co/ZrO2 can be easily tuned by changing reaction conditions, and can reach as high as 94%, 78% and 77%, respectively. The product selectivity is also significantly affected by the catalyst support. With SBA-15 as the support, the selectivity of EHP can reach 90%. Moreover, Co/ZrO2 gave an extraordinarily high GVL productivity of 1.50 mol g(metal)(-1 )h(-1) and displayed excellent stability and reusability. Interestingly, coke has a positive effect on the enhancement of GVL yield. AL dimers and trimers were identified as the coke species in the hydrogenation of EL. As far as we know, this is the first work conducting the flexible transformation of EL on cobalt catalysts.
机译：开发了高活性和选择性的钴催化剂，用于氢化生物质衍生的乙基乙酰乙酯（EL）至γ-戊酮（GV1），乙基4-羟基戊烷（EHP），1,4-戊二醇（1,4-PDO）和2-甲基四氢呋喃（2-MTHF），被认为是增值化学品和重要的生物燃料。研究了反应时间，反应温度，催化剂量和溶剂对其催化性能的影响。此外，还研究了反应途径。发现GV1，1,4-PDO和2-MTHF的选择性可以通过改变反应条件容易地调节CO / ZrO 2上，并且可以分别高达94％，78％和77％。产品选择性也受到催化剂载体的显着影响。随着SBA-15作为支持，EHP的选择性可以达到90％。此外，CO / ZrO2具有1.50molg（金属）（ - 1）H（-1）的非常高的GVL生产率，并显示出优异的稳定性和可重用性。有趣的是，焦炭对增强GVL产量具有积极影响。将Al二聚体和三聚体鉴定为EL的氢化中的焦炭物种。据我们所知，这是第一个在钴催化剂上进行柔性转化的工作。

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  • 来源
    《RSC Advances》 |2018年第17期|共9页
  • 作者

    Cen Youliang; Zhu Shanhui; Guo Jing; Chai Jiachun; Jiao Weiyong; Wang Jianguo; Fan Weibin;

  • 作者单位

    Chinese Acad Sci Inst Coal Chem State Key Lab Coal Convers Taiyuan 030001 Shanxi Peoples R China;

    Chinese Acad Sci Inst Coal Chem State Key Lab Coal Convers Taiyuan 030001 Shanxi Peoples R China;

    Chinese Acad Sci Inst Coal Chem State Key Lab Coal Convers Taiyuan 030001 Shanxi Peoples R China;

    Chinese Acad Sci Inst Coal Chem State Key Lab Coal Convers Taiyuan 030001 Shanxi Peoples R China;

    Chinese Acad Sci Inst Coal Chem State Key Lab Coal Convers Taiyuan 030001 Shanxi Peoples R China;

    Chinese Acad Sci Inst Coal Chem State Key Lab Coal Convers Taiyuan 030001 Shanxi Peoples R China;

    Chinese Acad Sci Inst Coal Chem State Key Lab Coal Convers Taiyuan 030001 Shanxi Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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