Journal
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
Volume 18, Issue 2, Pages 648-654Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2011.11.063
Keywords
Glycerol; Acetylation; Triacetin; CeO2-ZrO2 mixed oxide; Sulfate ion promoted catalyst
Funding
- Council of Scientific and Industrial Research, New Delhi
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The feasibility of acetylation of glycerol with acetic acid was investigated employing CeO2-ZrO2, CeO2-Al2O3, SO42-/CeO2-ZrO2, and SO42-/CeO2-Al2O3 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 SO42-/CeO2-ZrO2 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 SO42-/CeO2-ZrO2 catalyst to optimize the reaction conditions. Catalyst reusability was also carried out to understand its stability. (C) 2011 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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