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Acetylation of glycerol over heteropolyacids supported on activated carbon

Paper ID Volume ID Publish Year Pages File Format Full-Text
51098 46830 2011 4 PDF Available
Title
Acetylation of glycerol over heteropolyacids supported on activated carbon
Abstract

The acetylation of glycerol was carried out over dodecatungstophosphoric acid (PW) supported on activated carbon, being the monoacetin, diacetin and triacetin the reaction products.A series of catalysts, with different heteropolyacid loading (from 3.5 to 6.5 wt.%), were prepared. It was observed that the catalytic activity increases with the amount of PW immobilized on the activated carbon, being the PW2_AC (with 4.9 wt.%) the most active sample. However, at high loading of heteropolyacid on the activated carbon, a decrease on the catalytic activity was observed, which can be probably explained due to some hindrance in the activated carbon porous system.All catalysts exhibited good values of selectivity to the diacetin.Catalytic stability of the PW2_AC was also studied by performing consecutives batch runs with the same catalyst sample. After the third batch, it was observed that the catalytic activity stabilized.

Graphical AbstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch Highlights► Acetylation of glycerol was carried out over H3PW12O40 supported on carbon. ► High heteropolyacid dispersion on activated carbon (AC) was obtained. ► High catalytic activity with low amount of PW on AC was observed. ► All catalysts exhibited good values of selectivity to the diacetin.

Keywords
Glycerol; Esterification; Heteropolyacids; Activated carbon
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Acetylation of glycerol over heteropolyacids supported on activated carbon
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 12, Issue 7, 10 March 2011, Pages 573–576
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
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