Mg1+xCa1−xO2 as reusable and efficient heterogeneous catalyst for the synthesis of glycerol carbonate via the transesterification of glycerol with dimethyl carbonate

Authors: M.S. Khayoon, B.H. Hameed

Abstract:
A reusable and highly active heterogeneous catalyst of the type Mg_1+xCa_1−xO₂ has been developed and thermally treated at 850^◦C for 6 h. The catalytic activity was investigated during the transesterification of glycerol with dimethyl carbonate to synthesize the valuable glycerol carbonate. A typical Mg_1.2Ca_0.8O₂ mixed oxides catalyst was characterized by BET surface area, surface base amount, CO₂-TPD, XRD and FTIR, and its microstructure was studied by the aid of scanning and transmission electron microscopy. The investigated characteristics gave a clear insight into the catalytic performance of the catalyst. Over 0.30 g of this catalyst, glycerol conversion was almost complete and the yield of glycerol carbonate was 100% under atmospheric pressure. The best reaction conditions are: molar ratio of glycerol/DMC of 1:2, reaction temperature of 70 ^◦C and 90 min of reaction time. The transesterification results showed that the synergism interaction between Ca and Mg species in the catalyst structure was the reason for its high activity.

Keywords:
Glycerol
Glycerol carbonate
Mixed oxide catalyst
Fuel additives

Published in: Applied catalysis A: General  (Volume 466, Pages 1-314, 10 September 2013)

Publisher: Elsevier  

ISSN Information: 0926-860X

Mg1+xCa1−xO2 as reusable and efficient heterogeneous catalyst for the synthesis of glycerol carbonate via the transesterification of glycerol with dimethyl carbonate

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