Infrared Spectroscopic Study of Low Temperatrue CO Adsorption on Sulfided K-Mo/7-Al₂O₃

The low temperature infrared spectroscopy was applied to investigate the adsorption of CO and CO+H₂ on sulfided K-Mo/γ-Al₂O₃ catalyst. Three infrared absorption bands （at 2342,2151 and 2125cm^-1） were observed and assigned. The adsorption behaviour of CO with time and pressure were studied. It shows that CO molecules adsorb quickly and disproportionate partially to produce CO₂. In the case of CO and H₂ co-adsorption,CO₂adsorption strength increased. Potassium promoter interacts with molybdenum components and incurs CO disproportionate.