On the role of ceria in Ni-Al₂O₃ catalyst for CO₂ plasma methanation
Biset-Peiró, Martí (Institut de Recerca en Energia de Catalunya)
Guilera, Jordi (Institut de Recerca en Energia de Catalunya)
Zhang, Ting (Institut Català de Nanociència i Nanotecnologia)
Arbiol i Cobos, Jordi (Institut Català de Nanociència i Nanotecnologia)
Andreu, Teresa (Institut de Recerca en Energia de Catalunya)

Date:	2019
Abstract:	The effect of Ce loading content on Ni-CeO₂/Ni-Al₂O₃ catalysts for CO₂ plasma methanation was evaluated. Catalysts were prepared by one-pot evaporation-induced self-assembly, Ni content was fixed at 15 wt. %, while CeO₂ ranged 0-50 wt. %. The catalysts performances were tested under atmospheric pressure in two operation modes, thermal- and plasma-catalysis. As for conventional thermal catalysis, the catalyst was thermally activated between 200 and 400 °C; while in plasma-catalysis, the catalyst was activated by plasma generated by a dielectric barrier discharges (DBD) reactor. By the application of plasma in the catalyst bed, the reaction temperature was reduced from 350 °C to 150 °C to obtain the same level of conversion than thermal-catalysis. In addition, the incorporation of Ce in Ni-CeO₂/Ni-Al₂O₃ led to an improvement of the catalytic performance in both thermal- and plasma-catalysis. Nevertheless, divergences on the optimum Ce content were found. On plasma experiments, the catalyst was more active at a lower amount of CeO₂ (˜10 wt. %) with respect to thermal catalysis (˜40 wt. %), reducing the catalyst fabrication cost. Those differences highlights that the CO generated by plasma CO₂ dissociation has a significant role for methane production, and thus the need to consider the by-products as reactant for the optimization of catalysts composition for DBD plasma-catalysis.
Grants:	Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1246 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-327 Ministerio de Economía y Competitividad SEV-2017-0706 Ministerio de Economía y Competitividad ENE2017-85087-C3
Note:	Altres ajuts: IREC also gratefully acknowledge the funding of this work by CoSin project (COMRDI15-1-0037), funded by ACCIÓ and the European Regional Development Fund (FEDER) under the RIS3CAT Energy Community.
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Power-to-gasCO2 methanation ; Thermal-catalysis ; Plasma-catalysis ; DBD plasma ; Ceria-nickel-aluminia catalyst
Published in:	Applied catalysis. A, General, Vol. 575 (April 2019) , p. 223-229, ISSN 0926-860X

DOI: 10.1016/j.apcata.2019.02.028

Postprint 27 p, 1.3 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles