Please use this identifier to cite or link to this item:
|Title: ||Acetylation of glycerol over heteropolyacids supported on activated carbon|
|Authors: ||Ferreira, P|
|Editors: ||Goodwin Jr, J.G.|
|Issue Date: ||10-Mar-2011|
|Citation: ||P. Ferreira, I.M. Fonseca, A.M. Ramos, J. Vital, J.E. Castanheiro, Acetylation of glycerol over heteropolyacids supported on activated carbon, Catalysis Communications 12 (2011) 573–576.|
|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.|
|Appears in Collections:||QUI - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica|
CQE - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.