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Catalysts 2016, 6(4), 52; doi:10.3390/catal6040052

Synthesis of Diethyl Carbonate from Carbon Dioxide, Propylene Oxide and Ethanol over KNO3-CeO2 and KBr-KNO3-CeO2 Catalysts

Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry & Chemical Engineering, Tianjin University of Technology, Tianjin 300384, China
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Academic Editor: Keith Hohn
Received: 22 February 2016 / Revised: 18 March 2016 / Accepted: 23 March 2016 / Published: 29 March 2016
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Abstract

One-pot syntheses of diethyl carbonate (DEC) from CO2, propylene oxide and ethanol were carried out using different solid catalysts. The supercritical CO2 extraction method was used to separate the liquid products and reactants from the catalysts after reaction. The KNO3-CeO2 and KBr-KNO3-CeO2 were found to be active for the reaction after calcinations. The catalyst was also reusable. The thermodynamic properties of the reaction were also evaluated. The effects of various conditions, such as reaction time, amount of catalysts, molar ratio of the reactants, the composition and calcination temperature of the catalysts on the conversion and yields, were investigated, and the yield of DEC was about 13.0% with a selectivity of 38.5% over KBr-KNO3-CeO2. The yield of DEC was improved about 10-fold by using KBr-KNO3-CeO2 catalyst compared to CeO2. View Full-Text
Keywords: diethyl carbonate; carbon dioxide; propylene oxide; ethanol; solid catalyst diethyl carbonate; carbon dioxide; propylene oxide; ethanol; solid catalyst
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Wang, Y.; Jia, D.; Zhu, Z.; Sun, Y. Synthesis of Diethyl Carbonate from Carbon Dioxide, Propylene Oxide and Ethanol over KNO3-CeO2 and KBr-KNO3-CeO2 Catalysts. Catalysts 2016, 6, 52.

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