Zr promotion effect in CO 2 methanation over ceria supported nickel catalysts
Carbon dioxide methanation is an interesting way to reduce greenhouse effect gases emission and, simultaneously, provide a renewable energy source of methane. Ceria and 15 at.% Zr-doped ceria supported nickel catalysts were characterized by means of various techniques (BET, XRD, Raman, H 2 -TPR, CO...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_03603199_v44_n3_p1710_Iglesias |
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todo:paper_03603199_v44_n3_p1710_Iglesias2023-10-03T15:26:32Z Zr promotion effect in CO 2 methanation over ceria supported nickel catalysts Iglesias, I. Quindimil, A. Mariño, F. De-La-Torre, U. González-Velasco, J.R. Ceria CO 2 methanation Doped-ceria Nickel Zirconium Activation energy Alkalinity Carbon dioxide Cerium compounds Cerium oxide Greenhouse effect Hydrogenation Methanation Nickel Reaction rates Renewable energy resources Temperature Zirconium Apparent activation energy Catalytic performance Doped ceria Oxygen storage capacity Promotion effects Reduced catalysts Renewable energy source Supported nickel catalysts Catalyst supports Carbon dioxide methanation is an interesting way to reduce greenhouse effect gases emission and, simultaneously, provide a renewable energy source of methane. Ceria and 15 at.% Zr-doped ceria supported nickel catalysts were characterized by means of various techniques (BET, XRD, Raman, H 2 -TPR, CO 2 -TPD, O 2 -TPO, OSC and H 2 -chemisorption) and evaluated in carbon dioxide methanation. Zr incorporation into catalyst formulation reduced catalyst's basicity but favored its reducibility, nickel availability and oxygen storage capacity. These characteristics gave rise to an improved catalytic performance both in terms of activity and stability: temperature required to achieve 50% conversion was reduced in 20 °C and low temperature (250 °C) stability was improved in around 8%. Initial rates approach was employed to determine reaction rates and apparent activation energies for CO 2 methanation, which resulted in 113 and 121 kJ mol −1 for Ni/CeO 2 and Ni/Ce 0.85 Zr 0.15 O 2 , respectively. © 2018 Hydrogen Energy Publications LLC JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03603199_v44_n3_p1710_Iglesias |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Ceria CO 2 methanation Doped-ceria Nickel Zirconium Activation energy Alkalinity Carbon dioxide Cerium compounds Cerium oxide Greenhouse effect Hydrogenation Methanation Nickel Reaction rates Renewable energy resources Temperature Zirconium Apparent activation energy Catalytic performance Doped ceria Oxygen storage capacity Promotion effects Reduced catalysts Renewable energy source Supported nickel catalysts Catalyst supports |
| spellingShingle |
Ceria CO 2 methanation Doped-ceria Nickel Zirconium Activation energy Alkalinity Carbon dioxide Cerium compounds Cerium oxide Greenhouse effect Hydrogenation Methanation Nickel Reaction rates Renewable energy resources Temperature Zirconium Apparent activation energy Catalytic performance Doped ceria Oxygen storage capacity Promotion effects Reduced catalysts Renewable energy source Supported nickel catalysts Catalyst supports Iglesias, I. Quindimil, A. Mariño, F. De-La-Torre, U. González-Velasco, J.R. Zr promotion effect in CO 2 methanation over ceria supported nickel catalysts |
| topic_facet |
Ceria CO 2 methanation Doped-ceria Nickel Zirconium Activation energy Alkalinity Carbon dioxide Cerium compounds Cerium oxide Greenhouse effect Hydrogenation Methanation Nickel Reaction rates Renewable energy resources Temperature Zirconium Apparent activation energy Catalytic performance Doped ceria Oxygen storage capacity Promotion effects Reduced catalysts Renewable energy source Supported nickel catalysts Catalyst supports |
| description |
Carbon dioxide methanation is an interesting way to reduce greenhouse effect gases emission and, simultaneously, provide a renewable energy source of methane. Ceria and 15 at.% Zr-doped ceria supported nickel catalysts were characterized by means of various techniques (BET, XRD, Raman, H 2 -TPR, CO 2 -TPD, O 2 -TPO, OSC and H 2 -chemisorption) and evaluated in carbon dioxide methanation. Zr incorporation into catalyst formulation reduced catalyst's basicity but favored its reducibility, nickel availability and oxygen storage capacity. These characteristics gave rise to an improved catalytic performance both in terms of activity and stability: temperature required to achieve 50% conversion was reduced in 20 °C and low temperature (250 °C) stability was improved in around 8%. Initial rates approach was employed to determine reaction rates and apparent activation energies for CO 2 methanation, which resulted in 113 and 121 kJ mol −1 for Ni/CeO 2 and Ni/Ce 0.85 Zr 0.15 O 2 , respectively. © 2018 Hydrogen Energy Publications LLC |
| format |
JOUR |
| author |
Iglesias, I. Quindimil, A. Mariño, F. De-La-Torre, U. González-Velasco, J.R. |
| author_facet |
Iglesias, I. Quindimil, A. Mariño, F. De-La-Torre, U. González-Velasco, J.R. |
| author_sort |
Iglesias, I. |
| title |
Zr promotion effect in CO 2 methanation over ceria supported nickel catalysts |
| title_short |
Zr promotion effect in CO 2 methanation over ceria supported nickel catalysts |
| title_full |
Zr promotion effect in CO 2 methanation over ceria supported nickel catalysts |
| title_fullStr |
Zr promotion effect in CO 2 methanation over ceria supported nickel catalysts |
| title_full_unstemmed |
Zr promotion effect in CO 2 methanation over ceria supported nickel catalysts |
| title_sort |
zr promotion effect in co 2 methanation over ceria supported nickel catalysts |
| url |
http://hdl.handle.net/20.500.12110/paper_03603199_v44_n3_p1710_Iglesias |
| work_keys_str_mv |
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| _version_ |
1782023545674530816 |