Chemical Conversion of CO2: Evaluation of Different Ionic Liquids as Catalysts in Dimethyl Carbonate Synthesis

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Abstract

Dimethyl carbonate (DMC) synthesis from methanol and CO2was investigated using ionic liquids (ILs) as catalysts. ILs based on 1-alkyl-3-methyl imidazolium and N-alkylpyridine cations and [Cl-], [BF4-], [PF6-], [Tf2N-] anions were used in this study. Selectivity in DMC increased in the anion order: [Tf2N-] < [PF6-] < [Cl-] < [BF4-], following the same behavior for both cations. Methanol conversion was similar for all tested ILs. The best result for DMC selectivity (83%) was obtained when [emim][BF4] was used as catalyst. After 5 recycling tests, a loss of 8.5% in the catalyst activity was observed for [bmim][BF4].

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Vieira, M. O., Aquino, A. S., Schütz, M. K., Vecchia, F. D., Ligabue, R., Seferin, M., & Einloft, S. (2017). Chemical Conversion of CO2: Evaluation of Different Ionic Liquids as Catalysts in Dimethyl Carbonate Synthesis. In Energy Procedia (Vol. 114, pp. 7141–7149). Elsevier Ltd. https://doi.org/10.1016/j.egypro.2017.03.1876

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