Gas phase synthesis of dimethyl carbonate from CO2 and CH3OH over Cu-Ni/AC. A kinetic study

The catalytic activity for dimethyl carbonate formation from carbon dioxide and methanol over mono and bimetallic Cu:Ni supported on activated carbon is presented. Bimetallic catalysts exhibit higher catalytic activity than the monometallic samples, being Cu:Ni-2:1 (molar ratio) the best catalyst; X-Ray diffraction, transmission electron microscopy, and metal dispersion analysis provided insight into the improved activity. In situ FT-IR experiments were conducted to investigate the mechanism of formation of dimethyl carbonate from methanol and carbon dioxide over Cu-Ni:2-1. The kinetics of the direct synthesis of dimethyl carbonate in gas phase over Cu:Ni-2:1 supported on activated carbon catalyst was experimentally investigated at 12 bar and temperatures between 90 °C and 130 °C, varying the partial pressures of CO2 and methanol. Experimental kinetic data were consistent with a Langmuir-Hinshelwood model that included carbon dioxide and methanol adsorption on catalyst actives sites (Cu, Ni and Cu-Ni), and the reaction of adsorbed CO2 with methoxi species as the rate determining step. The estimated apparent activation energy was 94.2 kJ mol-1. ©2019.

• Autores: Arbeláez Pérez, Oscar Felipe; Cardozo S.D.; Romero A.F.O.; Holguín A.L.V.; Bustamante F.
• Tipo de recurso: Article of journal
• Fecha de publicación: 2020
• Institución: Universidad Cooperativa de Colombia
• Repositorio: Repositorio UCC
• OAI Identifier: oai:repository.ucc.edu.co:20.500.12494/41956
• Acceso en línea: https://doi.org/10.18273/revsal.v48n1-2016008; https://www.scopus.com/inward/record.uri?eid=2-s2.0-85021436484&doi=10.15381%2frivep.v28i1.11797&partnerID=40&md5=46e3cfd679d3e3faefecde38049ad7f2; https://hdl.handle.net/20.500.12494/41956
• Palabra clave: Catalysts; In situ Ft-ir analysis; Methanol; reaction mechanism; Reaction rate
• Rights: closedAccess
• License: http://purl.org/coar/access_right/c_14cb