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Methanation Performance of Unsupported MoP Catalysts Prepared with Phytic Acid under Low H 2 /CO
Author(s) -
Wang Baowei,
Wang Yu,
Zhao Jun,
Li Zhenhua,
Xu Yan,
Ma Xinbin
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202002029
Subject(s) - methanation , sulfidation , catalysis , raman spectroscopy , chemistry , desorption , inorganic chemistry , adsorption , x ray photoelectron spectroscopy , carbon fibers , sulfur , crystallite , nuclear chemistry , materials science , chemical engineering , organic chemistry , physics , composite number , optics , composite material , engineering , crystallography
In 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 N 2 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 H 2 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 H 2 S. The sulfur‐resistant methanation tests indicated that the inactivation of the catalysts was more serious with the higher H 2 S concentration, due to the sulfidation from MoP to MoS 2 .