Solid-state synthesis method for the preparation of cobalt doped Ni-Al_2O_3 mesoporous catalysts for CO_2 methanation

摘要

In this study, a simple solid-state synthesis method was employed for the preparation of the Ni-Co-Al2O3 catalysts with various Co loadings, and the prepared catalysts were used in CO2 methanation reaction. The results demonstrated that the incorporation of cobalt in nickel-based catalysts enhanced the activity of the catalyst. The results showed that the 15 wt%Ni-12.5 wt%Co-Al2O3 sample with a specific surface area of 129.96 m(2)/g possessed the highest catalytic performance in CO2 methanation (76.2% CO2 conversion and 96.39% CH4 selectivity at 400 degrees C) and this catalyst presented high stability over 10 h time-on-stream. Also, CO methanation was investigated and the results showed a complete CO conversion at 300 degrees C. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.