Abstract
AbstractIn this paper, using phytic acid as the precursor, the effects of the reduction temperature and post‐treatment conditions on the methanation performance of unsupported MoP catalysts were investigated. The synthesis mechanism and structure‐activity relationship of the catalyst were investigated by correlation characterization, such as N2 adsorption‐desorption, XRD, Raman analysis, element analysis and XPS. At the reduction temperature of 650 °C, MoP catalysts showed the higher methanation activity due to its smaller crystallite size and large specific surface area. After H2 post‐treatment at 750 °C, the CO conversion increased by 16.2% because of the higher specific surface area and lower contents of the carbon and phosphorus species in MoP‐750‐H. The MoP‐750‐H catalysts show good stability without H2S. The sulfur‐resistant methanation tests indicated that the inactivation of the catalysts was more serious with the higher H2S concentration, due to the sulfidation from MoP to MoS2.
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