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首页> 外文期刊>RSC Advances >Metal ion-exchanged zeolites as highly active solid acid catalysts for the green synthesis of glycerol carbonate from glycerol
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Metal ion-exchanged zeolites as highly active solid acid catalysts for the green synthesis of glycerol carbonate from glycerol

机译：金属离子交换沸石作为高活性固体酸催化剂，用于甘油甘油碳酸酯的绿色合成

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摘要

The application of metal ion-exchanged zeolites as highly efficient catalysts for the synthesis of glycerol carbonate from glycerol carbonylation is reported. The catalysts were prepared by an ion exchange method and characterized by XRD, py-FTIR, AAS, NH3TPD, N-2 sorption and SEM. The Na, H and Zn forms of different zeolites were screened for the reaction. The Zn-FAU zeolite exhibited a high glycerol carbonate yield compared to other Zn-zeolites such as Zn-ZSM5, Zn-MOR and Zn-beta. The acidity of the Zn-HY zeolite was correlated with the amount of zinc and catalytic activity of the reaction. As the zinc content increased in HY zeolite, glycerol conversion and selectivity for glycerol carbonate increased due to an increase in Lewis acidity. Among different metal ion-exchanged HY zeolites, Zn2+ showed a higher catalytic performance. Zn-Y catalyst with 0.79 mmol g(-1) of zinc content gave 94.6% glycerol conversion with 98% selectivity for glycerol carbonate. The degree of zinc loading, reaction temperature, catalyst amount, mole ratio and catalyst reusability were investigated.
机译：据报道了金属离子交换的沸石作为高效催化剂用于合成来自甘油羰基化的甘油碳酸酯。通过离子交换法制备催化剂，其特征在于XRD，Py-FTIR，AAS，NH 3TPD，N-2吸附和SEM。筛选Na，H和Zn形式的不同沸石的反应。与其他Zn-沸石如Zn-ZSM5，Zn-Mor和Zn-β相比，Zn-Fau沸石表现出高甘油碳酸酯产率。 Zn-Hy沸石的酸度与反应的锌和催化活性相关。随着锌含量在Hy沸石中增加，由于路易斯酸度的增加，甘油转化和甘油碳酸酯的选择性增加。在不同的金属离子交换的Hy沸石中，Zn2 +显示出更高的催化性能。 Zn-Y催化剂具有0.79mmol G（-1）的锌含量，得到94.6％的甘油转化，具有98％的甘油碳酸酯选择性。研究了锌加载程度，反应温度，催化剂量，摩尔比和催化剂可重用性。

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  • 来源
    《RSC Advances》 |2015年第19期|共8页
  • 作者

    Marakatti Vijaykumar S.; Halgeri Anand B.;

  • 作者单位

    Poornaprajna Inst Sci Res PPISR Div Mat Sci Bangalore 562110 Karnataka India;

    Poornaprajna Inst Sci Res PPISR Div Mat Sci Bangalore 562110 Karnataka India;

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