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Synthesis of Ethanol from Syngas over Rh/MCM-41 Catalyst: Effect of Water on Product Selectivity
dc.contributor.author | López, Luis | |
dc.contributor.author | Velasco, Jorge | |
dc.contributor.author | Montes, V. | |
dc.contributor.author | Marinas, Alberto | |
dc.contributor.author | Cabrera, Saúl | |
dc.contributor.author | Boutonnet, Magali | |
dc.contributor.author | Järås, Sven | |
dc.date.accessioned | 2017-11-09T07:49:03Z | |
dc.date.available | 2017-11-09T07:49:03Z | |
dc.date.issued | 2015 | |
dc.identifier.uri | http://hdl.handle.net/10396/15374 | |
dc.description.abstract | The thermochemical processing of biomass is an alternative route for the manufacture of fuel-grade ethanol, in which the catalytic conversion of syngas to ethanol is a key step. The search for novel catalyst formulations, active sites and types of support is of current interest. In this work, the catalytic performance of an Rh/MCM-41 catalyst has been evaluated and compared with a typical Rh/SiO2 catalyst. They have been compared at identical reaction conditions (280 °C and 20 bar), at low syngas conversion (2.8%) and at same metal dispersion (H/Rh = 22%). Under these conditions, the catalysts showed different product selectivities. The differences have been attributed to the concentration of water vapor in the pores of Rh/MCM-41. The concentration of water vapor could promote the water-gas-shift-reaction generating some extra carbon dioxide and hydrogen, which in turn can induce side reactions and change the product selectivity. The extra hydrogen generated could facilitate the hydrogenation of a C2-oxygenated intermediate to ethanol, thus resulting in a higher ethanol selectivity over the Rh/MCM-41 catalyst as compared to the typical Rh/SiO2 catalyst; 24% and 8%, respectively. The catalysts have been characterized, before and after reaction, by N2-physisorption, X-ray photoelectron spectroscopy, X-ray diffraction, H2-chemisorption, transmission electron microscopy and temperature programmed reduction. | es_ES |
dc.format.mimetype | application/pdf | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | MDPI | es_ES |
dc.rights | https://creativecommons.org/licenses/by/4.0/ | es_ES |
dc.source | Catalysts 5(4), 1737-1755 (2015) | es_ES |
dc.subject | Ethanol | es_ES |
dc.subject | Syngas | es_ES |
dc.subject | Rh/MCM-41 catalyst | es_ES |
dc.subject | Water vapor | es_ES |
dc.title | Synthesis of Ethanol from Syngas over Rh/MCM-41 Catalyst: Effect of Water on Product Selectivity | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.relation.publisherversion | http://dx.doi.org/10.3390/catal5041737 | es_ES |
dc.relation.projectID | Junta de Andalucía. P09-FQM-4781 | es_ES |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es_ES |