Recent advances in sulfur-resistant methanation

Sulfur-resistant methanation have been investigated for their insensitivity to sulfur poisoning and high activities in the methanation reaction with low H2/CO ratios. Molybdenum-based catalysts were studied widely in literature. The effects of Al2O3, Zr O2, Ce O2 and Ce O2-Al2O3 supports, and Co O and Ni O promoters on the performance of methanation catalysts were mainly introduced. The sulfidation mechanism for Mo O3 and Co O/Ni O promoted Mo O3 catalysts and Ce O2 support was critically analyzed based on the reported works. It was pointed out that the sulfidation temperature was a key factor to catalyst morphology. In addition, the mechanism of sulfur-resistant methanation was discussed. An overview regarding the opportunities for future research in sulfur-resistant methanation of CO was provided.