Observed kinetics for the production of diethyl carbonate from ­CO2 and ethanol catalyzed by CuNi nanoparticles supported on activated carbon

Monometallic and bimetallic Cu:Ni catalysts with diferent Cu:Ni molar ratios (3:1, 2:1, 1:1, 1:2, 1:3) were synthesized by wetness impregnation on activated carbon and characterized by TPR (temperature programmed reduction), XRD (X-ray difraction) and XPS (X-ray photoelectron spectroscopy). The synthesized catalysts were evaluated in the gas phase production of diethyl carbonate from ethanol and carbon dioxide. The largest catalytic activity was obtained over the bimetallic catalyst with a Cu:Ni molar ratio of 3:1. Its improved activity was attributed to the formation of a Cu–Ni alloy on the surface of the catalyst, evidenced by XPS and in agreement with a previous assignment based on Vegard law and TPR analysis. During the reaction rate experiments, it observed the presence of a maximum of the reaction rate as a function of temperature, a tendency also reported for other carbon dioxide–alcohol reactions. It showed that the reaction rate-temperature data can be adjusted with a reversible rate equation. The initial rate as a function of reactant partial pressure data was satisfactorily adjusted using the forward power law rate equation and it was found that the reaction rate is frst order in CO2 and second order in ethanol.

• Autores: Bustamante Londoño, Felipe; Villa Holguín, Aída Luz; Arbeláez Pérez, Oscar Felipe; Ardila Arias, Alba Nelly; Fuentes, Gustavo A.
• Tipo de recurso: Article of investigation
• Fecha de publicación: 2024
• Institución: Universidad de Antioquia
• Repositorio: Repositorio UdeA
• Idioma: eng
• OAI Identifier: oai:bibliotecadigital.udea.edu.co:10495/46676
• Acceso en línea: https://hdl.handle.net/10495/46676
• Palabra clave: Etanol; Ethanol; Carbonatos; Carbonates; Carbón activado; Carbon, activated; Catalizadores; Catalysts; Valor añadido; Value added; Emisión de gases de efecto invernadero; Greenhouse gas emissions; http://aims.fao.org/aos/agrovoc/c_25403; http://aims.fao.org/aos/agrovoc/c_36198c2c; https://id.nlm.nih.gov/mesh/D000431; ODS 9: Industria, innovación e infraestructura. Construir infraestructuras resilientes, promover la industrialización inclusiva y sostenible y fomentar la innovación; ODS 12: Producción y consumo responsables. Garantizar modalidades de consumo y producción sostenibles; ODS 13: Acción por el Clima. Adoptar medidas urgentes para combatir el cambio climático y sus efectos
• Rights: openAccess
• License: http://creativecommons.org/licenses/by/4.0/