Looking for an Optimal Composition of Nickel-Based Catalysts for CO 2 Methanation

Guido Busca (), Elena Spennati, Paola Riani and Gabriella Garbarino
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Guido Busca: Dipartimento di Ingegneria Civile, Chimica e Ambientale, Università di Genova, Via Opera Pia 15, 16145 Genova, Italy
Elena Spennati: Dipartimento di Ingegneria Civile, Chimica e Ambientale, Università di Genova, Via Opera Pia 15, 16145 Genova, Italy
Paola Riani: Consorzio Interuniversitario Nazionale di Scienza e Tecnologia dei Materiali (INSTM), UdR di Genova, Via Dodecaneso 31, 16146 Genova, Italy
Gabriella Garbarino: Dipartimento di Ingegneria Civile, Chimica e Ambientale, Università di Genova, Via Opera Pia 15, 16145 Genova, Italy

Energies, 2023, vol. 16, issue 14, 1-19

Abstract: A detailed critical analysis of the scientific literature data concerning catalysts for CO 2 methanation based on nickel supported over oxides was performed. According to the obtained information, it seems that an ionic support is necessary to allow a good nickel dispersion to produce very small nickel metal particles. Such small metal particles result in being very active toward methanation, limiting the production of carbonaceous materials. The use of support and/or surface additives gives rise to medium surface basicity, allowing medium-strong adsorption of CO 2 , and it is also advisable to increase the reaction rate. A medium nickel loading would allow the free support geometric surface to be covered densely by small nickel metal particles without the production of larger Ni crystals. It is also advisable to work at temperatures where Ni(CO) 4 formation is not possible (e.g., >573 K). The promising properties of systems based on doped Ni/Al 2 O 3 , doped with basic and re-active oxides such as MnO x or/and CeO 2 , and those based on Ni/CeO 2 were underlined.

Keywords: CO 2 hydrogenation; methanation; reverse water gas shift; substitute natural gas; nickel catalysts; carrier; support; carbon residues; deactivation; promoters (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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