Characteristics and performance of the Co-CeO2 catalyst as a function of the promoter (La, Pr, and Zr) used in high temperature water gas shift reaction

The catalysts used to facilitate the water gas shift reaction (WGSR) are generally harmful to the environment. Therefore, catalysts that have high activity and stability in WGSR and do not pollute the environment need to be fabricated. Herein, three promoters (La, Pr, and Zr) are added into Co-CeO2 (CoCe) catalyst to improve catalytic performance in a high temperature WGSR to produce high-purity hydrogen from waste-derived synthesis gas. Various techniques are employed to confirm the changes in the properties that affect the catalytic performance. The catalytic reaction is performed at a high gas hourly space velocity to screen the performance of the promoted CoCe catalysts. The CoCeZr catalyst shows the highest CO conversion (XCO = 88% at 450 degrees C) due to its high Co dispersion and oxygen vacancy resulting from the addition of Zr to the CoCe catalyst; thus, it is most suitable for use in high temperature WGSR. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Automated summary

By adding La, Pr, and Zr promoters to Co-CeO2 catalyst, the catalytic performance was improved to produce high-purity hydrogen. Various techniques were employed to confirm the changes in properties affecting catalytic performance, with the CoCeZr catalyst showing the best performance in high-temperature WGSR.