Properties of Pd, Pt and Ru-Based Catalysts in Catalytic Oxidation of Methanol.

Catalytic oxidation of methanol was investigated using Pd, Pt and Ru-based catalysts. Experiment was conducted at reaction temperature of 100-220 degrees C with methanol concentration of 3000 ppm and gas hourly space velocity (GHSV) of 16,000 hr(-1). Catalysts were characterized by using Brunauer-Emmett-Teller (BET) method, X-ray diffraction (XRD), field transmission electron microscopy (FE-TEM) and temperature programmed reduction (TPR). Based on complete oxidation temperature of methanol, the activity order was: 0.16 wt% Pd /0.16 wt% Pt/0.16 wt% Ru/gamma-Al2O3 > 0.5 wt% Pt/gamma-Al2O3 > 0.5 wt% Ru/gamma-AlO3 > 0.5 wt% Pd/gamma-Al2O3. Therefore, the activity of ternary metal-based catalyst was superior to single metal-based catalyst.