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Selective acetylation of glycerol over CeO 2-M and SO 4 2-/CeO 2-M (M=ZrO 2 and Al 2O 3) catalysts for synthesis of bioadditives
P.S. Reddy, , G. Raju, B.M. Reddy
Published in
2012
Volume: 18
   
Issue: 2
Pages: 648 - 654
Abstract
The feasibility of acetylation of glycerol with acetic acid was investigated employing CeO 2-ZrO 2, CeO 2-Al 2O 3, SO 4 2-/CeO 2-ZrO 2, and SO 4 2-/CeO 2-Al 2O 3 solid acid catalysts to synthesize monoacetin, diacetin and triacetin having interesting applications as bioadditives for petroleum fuels. Intensive physicochemical and surface characterization of the prepared catalysts were performed using XRD, BET surface area, ammonia-TPD and Raman spectroscopy techniques. Characterization results revealed that impregnated sulfate ions strongly influence the physicochemical characteristics of the investigated mixed oxide catalysts. Among various catalysts investigated, the SO 4 2-/CeO 2-ZrO 2 combination catalyst exhibited superior catalytic activity under mild conditions. The effect of various parameters such as reaction temperature, molar ratio of acetic acid to glycerol, catalyst wt% and time-on-stream were studied over the SO 4 2-/CeO 2-ZrO 2 catalyst to optimize the reaction conditions. Catalyst reusability was also carried out to understand its stability. © 2011 The Korean Society of Industrial and Engineering Chemistry.
About the journal
JournalJournal of Industrial and Engineering Chemistry
ISSN1226086X