Catalytic performance of silver ion-exchanged saponite for the selective reduction of nitrogen monoxide in the presence of excess oxygen

摘要

The catalytic activity of ion-exchanged saponites for NO reduction with hydrocarbons in the presence of oxygen was investigated. Silver ion-exchanged saponite (Ag-saponite) showed excellent catalytic activity for NO reduction with propene. The highest activity was obtained for Ag-saponite with a silver loading of 7–8 wt%, on which the addition of water vapor to the feed gas promoted NO reduction at temperatures below 400°C. 2-Propanol and acetone served as more efficient reducing agents in the presence of water vapor.