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Kinetic and in situ FTIR study of CO methanation on a Rh/Al

Authordc.contributor.authorEscobar, Mauricio 
Authordc.contributor.authorGracia, Francisco 
Authordc.contributor.authorKarelovic, Alejandro 
Authordc.contributor.authorJiménez, Romel 
Cita de ítemdc.identifier.citationCatalysis Science and Technology, Volumen 5, Issue 9, 2018, Pages 4532-4541
Abstractdc.description.abstract© The Royal Society of Chemistry 2015.Carbon monoxide hydrogenation was studied over a γ-alumina-supported 1 wt% Rh catalyst by means of kinetic and in situ infrared measurements. The study was carried out at 200-300 °C, 0-22.5 kPa H<inf>2</inf> and 1-7.5 kPa CO. The in situ FTIR scrutiny of the catalyst surface shows that adsorbed CO∗ species and vacancies dominate the Rh surface, while no effect of H<inf>2</inf> and H<inf>2</inf>O pressures on surface coverage was observed under the conditions studied. The kinetic data are consistent with the mechanism in which the C-O bond dissociation is assisted by a double H-addition while H<inf>2</inf> dissociative adsorption, CO molecular adsorption and the HCO∗ formation are quasi-equilibrated steps. A two-parameter Langmuir-Hinshelwood rate expression is deduced for CH<inf>4</inf> formation, in agreement with the proposed sequence of elementary steps and kinetic data. The effect of temperature on parameters α and K<inf>CO</inf> leads to an ap
Publisherdc.publisherRoyal Society of Chemistry
Type of licensedc.rightsAttribution-NonCommercial-NoDerivs 3.0 Chile
Link to Licensedc.rights.uri
Sourcedc.sourceCatalysis Science and Technology
Títulodc.titleKinetic and in situ FTIR study of CO methanation on a Rh/Al
Document typedc.typeArtículo de revista
Indexationuchile.indexArtículo de publicación SCOPUS

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Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 Chile