Glycerol steam reforming over layered double hydroxide-supported Pt catalysts

Layered double hydroxides containing Mg and Al (Mg/Al ratios of 3 and 5) were used as support for Pt-based catalysts for glycerol steam reforming. Additionally, catalysts supported on the parent MgAl mixed oxides were also evaluated. Fresh catalyst samples were characterized by XRD, BET, TPD-CO2 and...

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Autores principales:	de Rezende, S.M., Franchini, C.A., Dieuzeide, M.L., Duarte de Farias, A.M., Amadeo, N., Fraga, M.A.
Formato:	JOUR
Materias:	Carbon deposition Deactivation Glycerol Hydrogen production LDH Steam reforming Carbon Carbon dioxide Catalyst deactivation Catalyst selectivity Catalysts Platinum Carbonaceous materials Catalyst surfaces Layered double hydroxides Mg-Al mixed oxide Pt-based catalyst Catalyst supports
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_13858947_v272_n_p108_deRezende
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_13858947_v272_n_p108_deRezende
record_format	dspace
spelling	todo:paper_13858947_v272_n_p108_deRezende2023-10-03T16:12:14Z Glycerol steam reforming over layered double hydroxide-supported Pt catalysts de Rezende, S.M. Franchini, C.A. Dieuzeide, M.L. Duarte de Farias, A.M. Amadeo, N. Fraga, M.A. Carbon deposition Deactivation Glycerol Hydrogen production LDH Steam reforming Carbon Carbon dioxide Catalyst deactivation Catalyst selectivity Catalysts Glycerol Hydrogen production Platinum Steam reforming Carbon deposition Carbonaceous materials Catalyst surfaces Deactivation Layered double hydroxides LDH Mg-Al mixed oxide Pt-based catalyst Catalyst supports Layered double hydroxides containing Mg and Al (Mg/Al ratios of 3 and 5) were used as support for Pt-based catalysts for glycerol steam reforming. Additionally, catalysts supported on the parent MgAl mixed oxides were also evaluated. Fresh catalyst samples were characterized by XRD, BET, TPD-CO2 and XRF whilst the spent catalysts were examined by TEM and TPO/TGA-MS. All catalysts revealed to be active, leading to a hydrogen-rich gas stream but with distinct resistance to deactivation. The catalyst synthesized directly from the layered double hydroxide precursors with Mg/Al ratio of 3 was shown to be more effective since global and gas conversion are similar, varying within 60-25%. Major incidence of weak to moderate basic surface centers rendered catalysts more selective, reaching up to 68% selectivity to hydrogen. However, they were not enough to suppress deactivation. It was found that the formation of more stable carbon deposits play a key role on deactivation and only a minor contribution from the carbonaceous material formed from the intermediate organic liquid compounds was proposed. Highly dispersed metal centers were suggested to be important for in situ catalyst surface cleanness. © 2015 Elsevier B.V. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_13858947_v272_n_p108_deRezende
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Carbon deposition Deactivation Glycerol Hydrogen production LDH Steam reforming Carbon Carbon dioxide Catalyst deactivation Catalyst selectivity Catalysts Glycerol Hydrogen production Platinum Steam reforming Carbon deposition Carbonaceous materials Catalyst surfaces Deactivation Layered double hydroxides LDH Mg-Al mixed oxide Pt-based catalyst Catalyst supports
spellingShingle	Carbon deposition Deactivation Glycerol Hydrogen production LDH Steam reforming Carbon Carbon dioxide Catalyst deactivation Catalyst selectivity Catalysts Glycerol Hydrogen production Platinum Steam reforming Carbon deposition Carbonaceous materials Catalyst surfaces Deactivation Layered double hydroxides LDH Mg-Al mixed oxide Pt-based catalyst Catalyst supports de Rezende, S.M. Franchini, C.A. Dieuzeide, M.L. Duarte de Farias, A.M. Amadeo, N. Fraga, M.A. Glycerol steam reforming over layered double hydroxide-supported Pt catalysts
topic_facet	Carbon deposition Deactivation Glycerol Hydrogen production LDH Steam reforming Carbon Carbon dioxide Catalyst deactivation Catalyst selectivity Catalysts Glycerol Hydrogen production Platinum Steam reforming Carbon deposition Carbonaceous materials Catalyst surfaces Deactivation Layered double hydroxides LDH Mg-Al mixed oxide Pt-based catalyst Catalyst supports
description	Layered double hydroxides containing Mg and Al (Mg/Al ratios of 3 and 5) were used as support for Pt-based catalysts for glycerol steam reforming. Additionally, catalysts supported on the parent MgAl mixed oxides were also evaluated. Fresh catalyst samples were characterized by XRD, BET, TPD-CO2 and XRF whilst the spent catalysts were examined by TEM and TPO/TGA-MS. All catalysts revealed to be active, leading to a hydrogen-rich gas stream but with distinct resistance to deactivation. The catalyst synthesized directly from the layered double hydroxide precursors with Mg/Al ratio of 3 was shown to be more effective since global and gas conversion are similar, varying within 60-25%. Major incidence of weak to moderate basic surface centers rendered catalysts more selective, reaching up to 68% selectivity to hydrogen. However, they were not enough to suppress deactivation. It was found that the formation of more stable carbon deposits play a key role on deactivation and only a minor contribution from the carbonaceous material formed from the intermediate organic liquid compounds was proposed. Highly dispersed metal centers were suggested to be important for in situ catalyst surface cleanness. © 2015 Elsevier B.V.
format	JOUR
author	de Rezende, S.M. Franchini, C.A. Dieuzeide, M.L. Duarte de Farias, A.M. Amadeo, N. Fraga, M.A.
author_facet	de Rezende, S.M. Franchini, C.A. Dieuzeide, M.L. Duarte de Farias, A.M. Amadeo, N. Fraga, M.A.
author_sort	de Rezende, S.M.
title	Glycerol steam reforming over layered double hydroxide-supported Pt catalysts
title_short	Glycerol steam reforming over layered double hydroxide-supported Pt catalysts
title_full	Glycerol steam reforming over layered double hydroxide-supported Pt catalysts
title_fullStr	Glycerol steam reforming over layered double hydroxide-supported Pt catalysts
title_full_unstemmed	Glycerol steam reforming over layered double hydroxide-supported Pt catalysts
title_sort	glycerol steam reforming over layered double hydroxide-supported pt catalysts
url	http://hdl.handle.net/20.500.12110/paper_13858947_v272_n_p108_deRezende
work_keys_str_mv	AT derezendesm glycerolsteamreformingoverlayereddoublehydroxidesupportedptcatalysts AT franchinica glycerolsteamreformingoverlayereddoublehydroxidesupportedptcatalysts AT dieuzeideml glycerolsteamreformingoverlayereddoublehydroxidesupportedptcatalysts AT duartedefariasam glycerolsteamreformingoverlayereddoublehydroxidesupportedptcatalysts AT amadeon glycerolsteamreformingoverlayereddoublehydroxidesupportedptcatalysts AT fragama glycerolsteamreformingoverlayereddoublehydroxidesupportedptcatalysts
_version_	1782026855780450304

Glycerol steam reforming over layered double hydroxide-supported Pt catalysts

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