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AuthorEbrahimi P.
AuthorKumar A.
AuthorKhraisheh, Majeda
Available date2022-05-21T08:36:50Z
Publication Date2022
Publication NameInternational Journal of Hydrogen Energy
ResourceScopus
Identifierhttp://dx.doi.org/10.1016/j.ijhydene.2021.12.142
URIhttp://hdl.handle.net/10576/31183
AbstractThe reverse water–gas shift chemical (RWGS) reaction is a promising technique of converting CO2 to CO at low operating temperatures, with high CO selectivity and negligible side products. In this study, we investigate the synthesis of Cu/CeO2 catalyst using Solution Combustion Synthesis (SCS) technique and its performance for the RWGS reaction using a tubular packed bed reactor. Results indicate that the catalytic activity and stability of CeO2 at low and moderate temperatures can be effectively improved by the addition of a small quantity of copper (1 wt%). The conversion of CO2 improves with an increase in temperature, with a maximum value of 70% at 600 °C, showing a steady time on stream (TOS) performance for 1200 min with negligible carbon deposition of <0.05 wt%. The high catalyst activity is due to the synergistic interaction between the active Cu0 species and Ce3+-oxygen vacancy. The Cu/CeO2 catalyst was also found to have 100% selectivity for CO, and no CH4 was detected in the outlet stream. Moreover, the morphological characteristics of the support and catalysts (fresh and post-reaction samples), as well as the impact of reaction on the catalysts surface were investigated using various methods such as x-ray diffraction (XRD), transmission electron microscopy (TEM), and scanning electron microscopy with energy dispersive x-ray spectra (SEM/EDX). The results demonstrate that Cu/CeO2 offers a good potential for being a robust RWGS catalyst with exclusive selectivity for CO without the undesired methanation side-reaction.
Languageen
PublisherElsevier Ltd
SubjectCO2 reduction to CO
Cu/CeO2 catalysts
Reverse water gas shift reaction
Solution combustion synthesis
TitleCombustion synthesis of copper ceria solid solution for CO2 conversion to CO via reverse water gas shift reaction
TypeArticle
dc.accessType Abstract Only


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