Abstract
Molybdenum carbide was tested as a catalyst for the partial oxidation of methane to syngas in the presence of H2S. The fresh and used catalysts have been characterized using XRD, laser Raman and SEM-TEM. It is suggested that H2S concentration higher than 0.1 wt% in the feedstock results in conversion of the carbide phase to sulfide, and also promotes the oxidation of the carbide catalyst surface; the combined effect is catalyst deactivation. At low H2S concentration in the feedstock (<0.1 wt%) the structure of the carbide catalyst was unchanged, but the rate of carbon deposition over the reactor wall and in the catalyst bed increased, again leading to the catalyst deactivation.
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Xiao, TC., Wang, HT., York, A.P. et al. Effect of Sulfur on the Performance of Molybdenum Carbide Catalysts for the Partial Oxidation of Methane to Synthesis Gas. Catalysis Letters 83, 241–246 (2002). https://doi.org/10.1023/A:1021019021700
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DOI: https://doi.org/10.1023/A:1021019021700