Ethanol steam reforming over Rh(1%)MgAl2O4/Al 2O3: A kinetic study
A kinetic study of ethanol steam-reforming reaction on Rh catalyst supported over a spinel structure (MgAl2O4/Al 2O3) was carried out. From the analysis of products distribution, the following four reactions were proposed as the reaction scheme: C2H5OH → CO + CH4 + H2 (ED), C2H5OH + H2O → CO2 + CH 4...
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2010
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08885885_v49_n24_p12383_Graschinsky http://hdl.handle.net/20.500.12110/paper_08885885_v49_n24_p12383_Graschinsky |
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paper:paper_08885885_v49_n24_p12383_Graschinsky2023-06-08T15:46:59Z Ethanol steam reforming over Rh(1%)MgAl2O4/Al 2O3: A kinetic study Chemical shift Ethanol Kinetic theory Kinetics Surface reactions Water gas shift Discrimination model Dissociative adsorption Ethanol steam reforming Ethanol steam reforming reactions Methane steam reforming Products distributions Rate-determining step Water gas shift (WGS) reaction Steam reforming A kinetic study of ethanol steam-reforming reaction on Rh catalyst supported over a spinel structure (MgAl2O4/Al 2O3) was carried out. From the analysis of products distribution, the following four reactions were proposed as the reaction scheme: C2H5OH → CO + CH4 + H2 (ED), C2H5OH + H2O → CO2 + CH 4 + 2H2 (ER), water-gas shift reaction, and methane steam-reforming reaction. When the initial rate method was applied, it was demonstrated that in the rate-determining step (RDS) two active sites of the same type are involved. With use of our experimental results and data obtained from the literature, a sequence of 14 elementary steps were proposed, in agreement with the reaction scheme. Taking into account both the reaction mechanism and the occurrence of two active sites in the RDS, four different kinetic expressions can be formulated in which the RDS is (1) dissociative adsorption of ethanol, (2) dehydrogenation of ethoxide, (3) C-C bond scission, or (4) reaction between two adsorbed species. Finally, when discrimination models were applied, it was verified that the mechanism that fits experimental data is that in which the RDS is the surface reaction. © 2010 American Chemical Society. 2010 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08885885_v49_n24_p12383_Graschinsky http://hdl.handle.net/20.500.12110/paper_08885885_v49_n24_p12383_Graschinsky |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Chemical shift Ethanol Kinetic theory Kinetics Surface reactions Water gas shift Discrimination model Dissociative adsorption Ethanol steam reforming Ethanol steam reforming reactions Methane steam reforming Products distributions Rate-determining step Water gas shift (WGS) reaction Steam reforming |
| spellingShingle |
Chemical shift Ethanol Kinetic theory Kinetics Surface reactions Water gas shift Discrimination model Dissociative adsorption Ethanol steam reforming Ethanol steam reforming reactions Methane steam reforming Products distributions Rate-determining step Water gas shift (WGS) reaction Steam reforming Ethanol steam reforming over Rh(1%)MgAl2O4/Al 2O3: A kinetic study |
| topic_facet |
Chemical shift Ethanol Kinetic theory Kinetics Surface reactions Water gas shift Discrimination model Dissociative adsorption Ethanol steam reforming Ethanol steam reforming reactions Methane steam reforming Products distributions Rate-determining step Water gas shift (WGS) reaction Steam reforming |
| description |
A kinetic study of ethanol steam-reforming reaction on Rh catalyst supported over a spinel structure (MgAl2O4/Al 2O3) was carried out. From the analysis of products distribution, the following four reactions were proposed as the reaction scheme: C2H5OH → CO + CH4 + H2 (ED), C2H5OH + H2O → CO2 + CH 4 + 2H2 (ER), water-gas shift reaction, and methane steam-reforming reaction. When the initial rate method was applied, it was demonstrated that in the rate-determining step (RDS) two active sites of the same type are involved. With use of our experimental results and data obtained from the literature, a sequence of 14 elementary steps were proposed, in agreement with the reaction scheme. Taking into account both the reaction mechanism and the occurrence of two active sites in the RDS, four different kinetic expressions can be formulated in which the RDS is (1) dissociative adsorption of ethanol, (2) dehydrogenation of ethoxide, (3) C-C bond scission, or (4) reaction between two adsorbed species. Finally, when discrimination models were applied, it was verified that the mechanism that fits experimental data is that in which the RDS is the surface reaction. © 2010 American Chemical Society. |
| title |
Ethanol steam reforming over Rh(1%)MgAl2O4/Al 2O3: A kinetic study |
| title_short |
Ethanol steam reforming over Rh(1%)MgAl2O4/Al 2O3: A kinetic study |
| title_full |
Ethanol steam reforming over Rh(1%)MgAl2O4/Al 2O3: A kinetic study |
| title_fullStr |
Ethanol steam reforming over Rh(1%)MgAl2O4/Al 2O3: A kinetic study |
| title_full_unstemmed |
Ethanol steam reforming over Rh(1%)MgAl2O4/Al 2O3: A kinetic study |
| title_sort |
ethanol steam reforming over rh(1%)mgal2o4/al 2o3: a kinetic study |
| publishDate |
2010 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08885885_v49_n24_p12383_Graschinsky http://hdl.handle.net/20.500.12110/paper_08885885_v49_n24_p12383_Graschinsky |
| _version_ |
1768542601439346688 |