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首页> 外文期刊>RSC Advances >Conversion of levulinic acid to -valerolactone over Ru/Al2O3-TiO2 catalyst under mild conditions
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Conversion of levulinic acid to -valerolactone over Ru/Al2O3-TiO2 catalyst under mild conditions

机译：在温和条件下将乙酰丙酸转化为ru / Al 2 O 3-TiO2催化剂对valerolodone

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摘要

Novel catalytic material with high catalytic activity and hydrothermal stability plays a key role in the efficient conversion of levulinic acid (LA) to -valerolactone (GVL) in water. In this study, mixed oxides Al2O3-TiO2, Al2O3-MoO3 and Al2O3-Co3O4 were synthesized by co-precipitation using aqueous solution of NaOH as precipitant. Ru catalysts supported on mixed oxides were prepared by impregnation method and their catalytic performances were tested in the hydrogenation of LA to GVL on a fixed bed reactor. The physicochemical properties of the catalysts were characterized by XRD, H-2-TPR, NH3-TPD, and BET techniques. The TiO2 component significantly affected the acidity of the catalyst, and thus its catalytic activity for the GVL yield was affected. The desired product GVL with a yield of about 97% was obtained over the Ru/Al2O3-TiO2 catalyst under mild conditions (WHSV = 1.8 h(-1), T = 80 degrees C). Moreover, the catalyst Ru/Al2O3-TiO2 exhibited excellent thermal stability in the test period of time.
机译：具有高催化活性和水热稳定性新型催化材料起着乙酰丙酸（LA）的有效转化为γ-戊内酯（GVL）在水中的关键作用。在这项研究中，混合氧化物氧化铝 - 二氧化钛，氧化铝，氧化钼和Al2O3-的Co3O4通过共沉淀用NaOH的水溶液作为沉淀剂合成。支撑在混合氧化物的Ru催化剂通过浸渍法制备和它们的催化性能在LA氢化成GVL上的固定床反应器中测试。通过XRD，H-2-TPR，NH3-TPD，及BET方法的催化剂的物理化学性质进行了表征。在TiO 2组分显著影响催化剂的酸度，因而其为GVL产量的催化活性受到影响。在温和条件下在Ru /氧化铝 - 二氧化钛催化剂，得到具有约97％的产率的所需产物GVL（WHSV = 1.8 H（-1），T = 80℃）。此外，该催化剂的Ru / Al2O3的二氧化钛表现出的时间的测试周期优异的热稳定性。

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  • 来源
    《RSC Advances》 |2018年第71期|共7页
  • 作者

    Wang Ruifeng; Chen Lungang; Zhang Xinghua; Zhang Qi; Li Yuping; Wang Chenguang; Ma Longlong;

  • 作者单位

    Univ Sci &

    Technol China Nano Sci &

    Technol Inst Suzhou 215123 Peoples R China;

    Chinese Acad Sci Guangzhou Inst Energy Convers Guangzhou 510640 Guangdong Peoples R China;

    Chinese Acad Sci Guangzhou Inst Energy Convers Guangzhou 510640 Guangdong Peoples R China;

    Chinese Acad Sci Guangzhou Inst Energy Convers Guangzhou 510640 Guangdong Peoples R China;

    Chinese Acad Sci Guangzhou Inst Energy Convers Guangzhou 510640 Guangdong Peoples R China;

    Chinese Acad Sci Guangzhou Inst Energy Convers Guangzhou 510640 Guangdong Peoples R China;

    Chinese Acad Sci Guangzhou Inst Energy Convers Guangzhou 510640 Guangdong Peoples R China;

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

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