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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2015
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13858947_v272_n_p108_deRezende http://hdl.handle.net/20.500.12110/paper_13858947_v272_n_p108_deRezende |
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paper:paper_13858947_v272_n_p108_deRezende2023-06-08T16:12:45Z Glycerol steam reforming over layered double hydroxide-supported Pt catalysts 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. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13858947_v272_n_p108_deRezende 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 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. |
| 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 |
| publishDate |
2015 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13858947_v272_n_p108_deRezende http://hdl.handle.net/20.500.12110/paper_13858947_v272_n_p108_deRezende |
| _version_ |
1768545990239846400 |