A highly active and synergistic Pt/Mo2C/Al2O3 catalyst for water-gas shift reaction

作者：Osman Ahmed I^*; Abu Dahrieh Jehad K^*; Cherkasov Nikolay; Fernandez Garcia Javier; Walker David; Walton Richard I; Rooney David W; Rebrov Evgeny

来源：Molecular Catalysis, 2018, 455: 38-47.

DOI：10.1016/j.mcat.2018.05.025

• Water gas shift reaction
• Molybdenum carbide
• Platinum
• Alumina
• Syngas

Catalysts consisting of Pt and Cu supported on Mo2C/eta-Al2O3, Mo2C/gamma-Al2O3 or Mo2C were prepared and used for the low-temperature water gas shift reaction (WGSR). The catalysts were characterized by elemental analysis, powder X-ray diffraction (XRD), temperature-programmed reduction (TPR), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). The catalysts were studied in water gas shift reaction with a reaction mixture containing 11% CO, 43% H-2, 6% CO2, 21% H2O (real feed composition mixture from the reformer) and balance He, with a reaction temperature range of 180-300 degrees C at a space velocity (SV) of 125,000 h(-1). Catalyst supports (eta-Al2O3 and gamma-Al2O3), led to different synergetic effect between the two most active phases of Pt metal and Mo2C. Pt/Mo2C/eta-Al2O3 is a promising catalyst (44% conversion at 180 degrees C) due to the close interaction between Pt and Mo2C phases on the surface of the catalyst. The 4 wt% Pt-Mo2C showed the highest activity where the temperature at which 50% conversion observed was at only 180 degrees C with SV of 125,000 h(-1) and constant stability over 85 h.

• 出版日期2018-8