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Glycerol acetins: fuel additive synthesis by acetylation and esterification of glycerol using cesium phosphotungstate catalyst

机译:甘油乙酸盐:使用磷钨酸铯催化剂乙酰化和甘油酯化的燃料添加剂合成

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摘要

Glycerol acetylation and esterification reactions with acetic anhydride and acetic acid respectively give acetins, in which di and tri acetins are commercially important products used as fuel additives. Acetylation and esterification of glycerol were studied over various solid acid catalysts namely, cesium phosphotungstate, amberlyst-15, H-beta, sulfated zirconia and montmorillonite K-10 under mild reaction conditions. The catalysts were characterized by XRD, FTIR, SEM and acidity measurements. Among all the catalysts evaluated in this study, cesium phosphotungstate showed highest activity with > 98% conversion for both the reactions, whereas di and triacetins selectivity was 99.1% for acetylation and 75% for esterification reaction. The catalyst with high Bronsted acidity gave high activity for both the reactions, whereas selectivity for di and tri acetins depends on nature of active sites.
机译:甘油乙酰化和酯化反应与乙酸酐和乙酸分别给予乙酸乙酸,其中DI和三醋是商业上的重要产品,用作燃料添加剂。 在温和的反应条件下,在各种固体酸催化剂上,在各种固体酸催化剂上,在各种固体酸催化剂中,在各种固体酸催化剂上进行甘油的乙酰化和酯化,磷钨酸铯,氨基烷基,H-β,硫酸化氧化锆和蒙脱石K-10。 催化剂的特征在于XRD,FTIR,SEM和酸度测量。 在本研究中评估的所有催化剂中,磷钨酸铯显示出最高活性,均为反应> 98%转化率,而DI和三乙酸酯选择性为乙酰化的99.1%,酯化反应为75%。 具有高伪装酸度的催化剂对于反应产生了高活性,而DI和三醋丝的选择性取决于活性位点的性质。

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  • 来源
    《RSC Advances》 |2015年第126期|共9页
  • 作者单位

    Poornaprajna Inst Sci Res PPISR Div Mat Sci Bengaluru 562164 Karnataka India;

    Poornaprajna Inst Sci Res PPISR Div Mat Sci Bengaluru 562164 Karnataka India;

    Poornaprajna Inst Sci Res PPISR Div Mat Sci Bengaluru 562164 Karnataka India;

    Poornaprajna Inst Sci Res PPISR Div Mat Sci Bengaluru 562164 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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