| abstract |
The invention discloses a pretreatment method for improving the activity of an NH3 -SCR catalyst, belonging to the technical field of catalysts. The specific process of the method is as follows: preparing FeCeOx powder by a co-precipitation method, then dissolving the FeCeOx powder, citric acid and oxalic acid in distilled water and uniformly stirring at room temperature, and finally drying and roasting in an air atmosphere to obtain High performance medium and low temperature NH 3 ‑SCR catalyst. The present invention uses citric acid pretreatment to change the existing form of active species on the surface of the original catalyst, improves the acidity of the catalyst, adjusts the redox performance of the original catalyst, and significantly improves the NO conversion rate and N of the original catalyst. 2 Selectivity, it has broad application prospects in the field of medium temperature NH 3 ‑SCR catalytic denitrification in non-electrical industries. |