Effect of Acidity, Basicity and ZrO2 Phases of Cu-Ni/ZrO2 Catalysts on the Direct Synthesis of Diethyl Carbonate from CO2 and Ethanol

Cu-Ni/ZrO2 catalysts with different Cu:Ni molar ratios were synthesized and tested in the direct synthesis of diethyl carbonate from carbon dioxide and ethanol. The effect of Cu:Ni molar ratio on the acidity and basicity of the catalysts was investigated using NH3 and CO2-TPD, respectively. Experimental results revealed that Cu:Ni-3:1/ZrO2 and Cu:Ni-2:1/ZrO2 samples exhibited the largest acidity and basicity, as well as the highest yield to diethyl carbonate. In particular, these catalysts displayed very-high selectivity (i.e., larger than 95 %) and activity (i.e., equilibrium conversions are attained). Additionally, XRD and Raman studies showed that structural and crystalline properties of ZrO2 were modified with Cu:Ni ratios of 3:1 and 2:1 (Cu:Ni-1:1/ZrO2, Cu:Ni-1:2/ZrO2) which was related to the improved catalytic activity in comparison to Cu:Ni-1:1/ZrO2, Cu:Ni-1:2/ZrO2, Cu:Ni-1:3/ZrO2 and ZrO2. © 2016 Springer Science+Business Media.

• Autores: Arbeláez Pérez, Oscar Felipe; Orrego A.; Bustamante F.; Villa A.L.
• Tipo de recurso: Article of journal
• Fecha de publicación: 2016
• Institución: Universidad Cooperativa de Colombia
• Repositorio: Repositorio UCC
• OAI Identifier: oai:repository.ucc.edu.co:20.500.12494/41383
• Acceso en línea: https://doi.org/10.1007/s10953-013-0058-y; https://hdl.handle.net/20.500.12494/41383
• Palabra clave: Carbon dioxide; Carbonation; Catalyst activity; Catalyst selectivity; Catalysts; Ethanol; Zirconia; Zirconium alloys; Bimetallic catalysts; Crystalline properties; Diethyl carbonates; Direct synthesis; Equilibrium conversion; High selectivity; Molar ratio; Raman studies; Nickel
• Rights: closedAccess
• License: http://purl.org/coar/access_right/c_14cb