Syngas(CO, H₂) methanation is an effective route to produce synthetic nature gas (SNG), and the Ni-based catalysts are extensively used for this reaction. However, due to the high CO concentration, high reaction temperature and the presence of sulfur-containing compounds in raw gas, the Ni-based catalysts suffer from sintering, carbon deposition and sulfur poisoning during the methanation reaction. These often lead to the catalyst deactivation. How to improve the sulfur-tolerant, anti-sintering and anti-carbon deposition abilities of the Ni-based catalysts remains a great challenge. In this paper, the recent progress in solving the above issue is reviewed from the aspects of the metal-support interaction, the interface modification and the confinement effect to provide a theoretical basis for the microstructure design and the performance regulation of the Ni-based methanation catalysts.
Contents
1 Introduction
2 Metal-support interaction
3 Interface modification
4 Confinement effect
5 Conclusion