CO2 methanation over metal catalysts ...
Document type :
Article dans une revue scientifique: Article original
Permalink :
Title :
CO2 methanation over metal catalysts supported on ZrO2: Effect of the nature of the metallic phase on catalytic performance
Author(s) :
Alves, L. M. N. C. [Auteur]
Universidade Federal Fluminense [Rio de Janeiro] [UFF]
Almeida, M. P. [Auteur]
Instituto Militar de Engenharia=Military Institute of Engineering [IME]
Ayala, M. [Auteur]
The University of Texas at San Antonio [UTSA]
Watson, C. D. [Auteur]
The University of Texas at San Antonio [UTSA]
Jacobs, G. [Auteur]
The University of Texas at San Antonio [UTSA]
Rabelo-Neto, R. C. [Auteur]
Bellot Noronha, Fabio [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Mattos, L. V. [Auteur]
Universidade Federal Fluminense [Rio de Janeiro] [UFF]
Alves, L. M. N. C. [Auteur]
Universidade Federal Fluminense [Rio de Janeiro] [UFF]
Almeida, M. P. [Auteur]
Instituto Militar de Engenharia=Military Institute of Engineering [IME]
Ayala, M. [Auteur]
The University of Texas at San Antonio [UTSA]
Watson, C. D. [Auteur]
The University of Texas at San Antonio [UTSA]
Jacobs, G. [Auteur]
The University of Texas at San Antonio [UTSA]
Rabelo-Neto, R. C. [Auteur]
Bellot Noronha, Fabio [Auteur]

Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Mattos, L. V. [Auteur]
Universidade Federal Fluminense [Rio de Janeiro] [UFF]
Alves, L. M. N. C. [Auteur]
Journal title :
Chem. Eng. Sci.
Volume number :
239
Publication date :
2021-06-01
ISSN :
0009-2509
English keyword(s) :
XANES
DRIFTS
Ru-Ni alloy
Reverse water-gas shift
CO2 methanation
DRIFTS
Ru-Ni alloy
Reverse water-gas shift
CO2 methanation
HAL domain(s) :
Chimie/Catalyse
English abstract : [en]
Zirconia was used to support Ru, Ni, and Ru-Ni bimetallic nanoparticles for CO2 methanation. The formation of an alloy was detected in Ru K-edge spectra. The Ru/ZrO2 exhibited the highest CO2 reaction rate (1.35 mol/molmetal.s) ...
Show more >Zirconia was used to support Ru, Ni, and Ru-Ni bimetallic nanoparticles for CO2 methanation. The formation of an alloy was detected in Ru K-edge spectra. The Ru/ZrO2 exhibited the highest CO2 reaction rate (1.35 mol/molmetal.s) with a CH4 selectivity of 97.3%. The diffuse reflectance infrared fourier transform spectroscopy experiments suggest that formates serve as intermediates in converting CO2 to CO via reverse water–gas shift at the interface between Ru and defect-sites on zirconia, while Ru metal intercepts CO, further hydrogenating it to CH4. The better performance of Ru/ZrO2 could be related to the Ru-zirconia interface and Ru on-top atoms, which promote the reverse water gas shift and the CO hydrogenation reactions. Thus, this work provided important information about the effect of alloying Ru with Ni on the performance of the catalyst for the CO2 methanation, as well as the mechanism of this reaction for the best catalyst, Ru/ZrO2.Show less >
Show more >Zirconia was used to support Ru, Ni, and Ru-Ni bimetallic nanoparticles for CO2 methanation. The formation of an alloy was detected in Ru K-edge spectra. The Ru/ZrO2 exhibited the highest CO2 reaction rate (1.35 mol/molmetal.s) with a CH4 selectivity of 97.3%. The diffuse reflectance infrared fourier transform spectroscopy experiments suggest that formates serve as intermediates in converting CO2 to CO via reverse water–gas shift at the interface between Ru and defect-sites on zirconia, while Ru metal intercepts CO, further hydrogenating it to CH4. The better performance of Ru/ZrO2 could be related to the Ru-zirconia interface and Ru on-top atoms, which promote the reverse water gas shift and the CO hydrogenation reactions. Thus, this work provided important information about the effect of alloying Ru with Ni on the performance of the catalyst for the CO2 methanation, as well as the mechanism of this reaction for the best catalyst, Ru/ZrO2.Show less >
Language :
Anglais
Audience :
Internationale
Popular science :
Non
Administrative institution(s) :
Université de Lille
CNRS
Centrale Lille
ENSCL
Univ. Artois
CNRS
Centrale Lille
ENSCL
Univ. Artois
Collections :
Research team(s) :
Valorisation des alcanes et de la biomasse (VAALBIO)
Submission date :
2023-06-29T14:02:15Z
2023-10-20T08:25:08Z
2023-10-20T08:25:08Z