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Highly efficient Ni/CeO2-Al2O3 catalysts for CO2 upgrading via Reverse Water-Gas Shift: Effect of selected transition metal promoters

Yang, L., Pastor-Pérez, L., Gu, S., Sepúlveda-Escribano, A. and Reina, T. R. (2018) Highly efficient Ni/CeO2-Al2O3 catalysts for CO2 upgrading via Reverse Water-Gas Shift: Effect of selected transition metal promoters Applied Catalysis B: Environmental, 232. pp. 464-471.

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Abstract

In the context of Carbon Capture and Utilisation (CCU), the catalytic reduction of CO2 to CO via reverse water-gas shift (RWGS) reaction is a desirable route for CO2 valorisation. Herein, we have developed highly effective Ni-based catalysts for this reaction. Our study reveals that CeO2-Al2O3 is an excellent support for this process helping to achieve high degrees of CO2 conversions. Interestingly, FeOx and CrOx, which are well-known active components for the forward shift reaction, have opposite effects when used as promoters in the RWGS reaction. The use of iron remarkably boosts the activity, selectivity and stability of the Ni-based catalysts, while adding chromium results detrimental to the overall catalytic performance. In fact, the iron-doped material was tested under extreme conditions (in terms of space velocity) displaying fairly good activity/stability results. This indicates that this sort of catalysts could be potentially used to design compact RWGS reactors for flexible CO2 utilisation units.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Chemical and Process Engineering
Authors :
NameEmailORCID
Yang, L.ly00201@surrey.ac.uk
Pastor-Pérez, L.
Gu, S.sai.gu@surrey.ac.uk
Sepúlveda-Escribano, A.
Reina, T. R.t.ramirezreina@surrey.ac.uk
Date : 27 March 2018
Funders : Engineering and Physical Sciences Research Council (EPSRC)
Identification Number : 10.1016/j.apcatb.2018.03.091
Copyright Disclaimer : © 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/BY/4.0/).
Uncontrolled Keywords : Reverse water-gas shift; Ni catalyst; Ceria support; Fe promoter
Related URLs :
Depositing User : Clive Harris
Date Deposited : 28 Mar 2018 07:32
Last Modified : 29 May 2018 08:09
URI: http://epubs.surrey.ac.uk/id/eprint/846093

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