Journal
MOLECULAR CATALYSIS
Volume 482, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.mcat.2019.110668
Keywords
Molybdenum carbide; ZrO2 support; Preparation method; Sulfur-resistant methanation
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Funding
- National High Technology Research and Development Program of China (863 Project) [2015AA050504]
- National Natural Science Foundation of China [21576203, 21606167]
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Molybdenum-based catalysts, especially MoS2 have been widely applied to the hydrogenation reaction system for the excellent catalytic and sulfur-resistant performance. As a typical transition metal carbide, there are few reports on the application of Mo2C to sulfur-resistant methanation. Herein, a series of Mo2C/ZrO2 were obtained by coprecipitation and impregnation methods as well as applied to sulfur-resistant methanation. Effects of Mo2C loading and the water bath temperature during coprecipitation on the catalytic activity of Mo2C/ZrO2 were further studied, with emphasis on the change of structures and active components affected by the water bath temperature. The catalyst (15 wt.% Mo2C loading) obtained by coprecipitation at the 80 degrees C water bath exhibited the highest CO conversion (maintained above 60% under the experimental condition). The combined techniques of N-2 adsorption-desorption, X-ray diffraction, Raman spectroscopy, H-2 temperature-programmed reduction were also used to characterize the as-obtained catalysts. The study, with insights of the transformation of Mo species and ZrO2 support during the preparation process, provides the possibility for the further application of Mo2C/ZrO2.
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