Flexible syngas production using a La₂Zr₂O₇-δ pyrochlore-double perovskite catalyst: Towards a direct route for gas phase CO₂ recycling

Le Saché, E., Pastor-Pérez, L., Garcilaso, V., Watson, D.J., Centeno, M.A., Odriozola, J.A. and Reina, T.R. (2019) Flexible syngas production using a La₂Zr₂O₇-δ pyrochlore-double perovskite catalyst: Towards a direct route for gas phase CO₂ recycling Catalysis Today.

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Abstract

The bi-reforming of methane (BRM) has the advantage of utilising greenhouse gases and producing H₂ rich syngas. In this work Ni stabilised in a pyrochlore-double perovskite structure is reported as a viable catalyst for both Dry Reforming of Methane (DRM) and BRM. A 10 wt.% Ni-doped La₂Zr₂O₇ pyrochlore catalyst was synthesised, characterised and tested under both reaction conditions and its performance was compared to a supported Ni/La₂Zr₂O₇. In particular the effect of steam addition is investigated revealing that steam increases the H₂ content in the syngas but limits reactants conversions. The effect of temperature, space velocity and time on stream was studied under BRM conditions and brought out the performance of the material in terms of activity and stability. No deactivation was observed, in fact the addition of steam helped to mitigate carbon deposition. Small and well dispersed Ni clusters, possibly resulting from the progressive exsolution of Ni from the mixed oxide structure could explain the enhanced performance of the catalyst.

Item Type:	Article
Divisions :	Faculty of Engineering and Physical Sciences > Chemical and Process Engineering
Authors :	Name Email ORCID Le Saché, E. e.lesache@surrey.ac.uk Pastor-Pérez, L. l.pastorperez@surrey.ac.uk Garcilaso, V. Watson, D.J. Centeno, M.A. Odriozola, J.A. Reina, T.R. t.ramirezreina@surrey.ac.uk
Date :	22 May 2019
Funders :	University of Surrey, Engineering and Physical Sciences Research Council (EPSRC), Royal Society, Ministerio de Economía, Industria y Competitividad
DOI :	10.1016/j.cattod.2019.05.039
Copyright Disclaimer :	© 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Depositing User :	Clive Harris
Date Deposited :	29 May 2019 07:52
Last Modified :	23 May 2020 02:08
URI:	http://epubs.surrey.ac.uk/id/eprint/851900

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