화학공학소재연구정보센터
Applied Catalysis A: General, Vol.244, No.1, 129-140, 2003
Partial oxidation of methanol at millisecond contact times
The partial oxidation of methanol has been carried out on Pt-and Rh-coated alpha-alumina monoliths in an autothermal, short contact time reactor. This is seen as a possible first step in converting methanol to hydrogen for use in fuel cells for mobile applications. Methanol was readily converted to primarily CO and H-2 at CH3OH/O-2 ratios from two to five. Higher ratios produced lower temperatures, lower methanol conversions, and higher H-2 selecitivities. CO selectivity on both catalysts increased from CH3OH/O-2 = 2 to 3-3.5, but decreased beyond this ratio. This was attributed to the water-gas shift reaction where equilibrium of this reaction becomes more favorable at higher ratios due to the decrease in reaction temperature. Platinum and rhodium gave very similar trends, suggesting that thermodynamic equilibrium, not catalyst properties, determines product composition.