Journal
CATALYSTS
Volume 10, Issue 10, Pages -Publisher
MDPI
DOI: 10.3390/catal10101168
Keywords
AMO-LDH; layered double oxides; CO2 hydrogenation; methane; Ni catalyst
Categories
Funding
- Fundamental Research Funds for the Central Universities [BLX201935, 2019JQ03015]
- International Science and Technology Cooperation Project of Bingtuan [2018BC002]
- Beijing Municipal Education Commission through the Innovative Transdisciplinary Program Ecological Restoration Engineering
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Converting CO2 to methane via catalytic routes is an effective way to control the CO2 content released in the atmosphere while producing value-added fuels and chemicals. In this study, the CO2 methanation performance of highly dispersed Ni-based catalysts derived from aqueous miscible organic layered double hydroxides (AMO-LDHs) was investigated. The activity of the catalyst was found to be largely influenced by the chemical composition of Ni metal precursor and loading. A Ni-based catalyst derived from AMO-Ni3Al1-CO3 LDH exhibited a maximum CO2 conversion of 87.9% and 100% CH4 selectivity ascribed to both the lamellar catalyst structure and the high Ni metal dispersion achieved. Moreover, due to the strong Ni metal-support interactions and abundant oxygen vacancy concentration developed, this catalyst also showed excellent resistance to carbon deposition and metal sintering. In particular, high stability was observed after 19 h in CO2/H-2 reaction at 360 degrees C.
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