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Catalysis in Green Chemistry and Engineering

ISSN Druckformat: 2572-9896
ISSN Online: 2572-990X

Catalysis in Green Chemistry and Engineering

DOI: 10.1615/.2017020825
pages 79-90

SELECTIVE TRANSESTERIFICATION OF GLYCEROL TO GLYCEROL CARBONATE OVER SrO-ZrO2 BASE CATALYSTS

Ganji Parameswaram
Catalysis Laboratory, I&PC Division
Ambati Srivani
Catalysis Laboratory, I&PC Division
Chenna Sumana
Chemical Engineering Division, CSIR-Indian Institute of Chemical Technology, Hyderabad-500 007, Telangana, India
Gollapalli Nageswara Rao
Department of Chemistry, Andhra University, Vishakhapatnam, 530017, A.P. India
Nakka Lingaiah
Catalysis Laboratory, I&PC Division, CSIR-Indian Institute of Chemical Technology, Hyderabad-500 007, Telangana, India

ABSTRAKT

Glycerol carbonate was prepared selectively by transesterification of glycerol with dimethyl carbonate over heterogeneous strontium-zirconium mixed oxide base catalysts. These catalysts were prepared by coprecipitation method with varying Sr to Zr molar ratio and characterized by Brunauer-Emmett-Teller (BET) surface area, X-ray diffraction, and temperature programmed desorption of CO2. The catalysts' activity was varied with variation in the Sr to Zr ratio and the catalysts with the ratio of 3:1 exhibited the highest activity towards glycerol carbonate. The characterization results suggested that the activity of the catalysts depended on the amount of basic sites present in the catalysts and the basicity was dependent on the Sr to Zr ratio and treatment temperature. The effect of reaction parameters on the yield of glycerol carbonate was studied and also the kinetic expression was derived. The catalyst showed consistent activity upon reuse.


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