Tuning of diglycerol yield and isomer distribution in oligomerization of glycerol supported by DFT-calculations

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• 作者：Andreas Martin^a ; ^{andreas.martin@catalysis.de} ; Marek Pawel Checinski^a ; ^b ; Manfred Richter^a
• 关键词：Glycerol ; Diglycerol ; Basic zeolites ; Nafion® ; Oligomerization ; DFT-calculations
• 刊名：Catalysis Communications
• 出版年：2012
• 期刊代码：12_15667367
• 类别：ce
• 出版时间：5 August, 2012
• 卷：25
• 期：Complete
• 页码：130-135
• 文件大小：975 K

摘要

Diglycerol (DG) is a useful compound for food, cosmetic and chemical applications being available from cheap glycerol of biodiesel manufacture. Homogeneous catalyzed conversions led to a distribution of the three isomers (58(伪伪鈥? : 35(伪尾) : 7(尾尾鈥?; glycerol conversion (X) = 55%, DG yield (Y-DG) = 40%; 7 h). This can be shifted in favor of 伪尾-DG by using basic zeolites (e.g. CsX, 24(伪伪鈥? : 52(伪尾) : 24(尾尾鈥?; X = 70%, Y-DG ca. 45%; 8 h). Otherwise, acidic Nafion庐 catalyst revealed 69(伪伪鈥? : 27(伪尾) : 4(尾尾鈥? distribution (X = 93%, Y-DG ca. 68%; 24 h) using a falling film reactor under reduced pressure.