Artículo
Evidence of new Ni-O-K catalytic sites with superior stability for methane dry reforming
Autor/es | Azancot Luque, Lola de las Aguas
Blay, Vincent Blay Roger, José Rubén Bobadilla Baladrón, Luis Francisco Penkova, Anna Dimitrova Centeno Gallego, Miguel Ángel Odriozola Gordón, José Antonio |
Departamento | Universidad de Sevilla. Departamento de Química Inorgánica |
Fecha de publicación | 2022 |
Fecha de depósito | 2022-11-22 |
Publicado en |
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Resumen | Liquid fuels produced via Fischer-Tropsch synthesis from biomass-derived syngas constitute an attractive and sustainable energy vector for the transportation sector. This study focuses on the role of potassium as a promoter ... Liquid fuels produced via Fischer-Tropsch synthesis from biomass-derived syngas constitute an attractive and sustainable energy vector for the transportation sector. This study focuses on the role of potassium as a promoter in Ni-based catalysts for reducing coke deposition during catalytic dry reforming. The study provides a new structural link between catalytic performance and physicochemical properties. We identify new Ni-O-K chemical states associated with high stability in the reforming process, evidenced by different characterization techniques. The nickel particles form a core surrounded by a Ni-O-K phase layer (Ni@Ni-O-K) during the reduction of the catalyst. This phase likely presents an alkali-nickelate-type structure, in which nickel is stabilized in oxidation state + 3. The Ni-O-K formation induces essential changes in the electronic, physical, structural, and morphological properties of the catalysts, notably enhancing their long-term stability in dry reforming. This work thus provides new directions for designing more efficient catalysts for sustainable gas-to-liquids processes. |
Agencias financiadoras | Ministerio de Economía y Competitividad (MINECO). España Universidad de Sevilla |
Identificador del proyecto | RTI2018-096294-B-C33
US-1263288 |
Cita | Azancot Luque, L.d.l.A., Blay, V., Blay Roger, J.R., Bobadilla Baladrón, L.F., Penkova, A.D., Centeno Gallego, M.Á. y Odriozola Gordón, J.A. (2022). Evidence of new Ni-O-K catalytic sites with superior stability for methane dry reforming. Applied Catalysis B: Environmental, 307, 121148. https://doi.org/10.1016/j.apcatb.2022.121148. |
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Evidence of new Ni-O-K.pdf | 7.512Mb | [PDF] | Ver/ | |