METHOD OF PREPARATION OF A CATALYST FOR THE REMOVAL OF NITROUS OXIDE FROM WASTE INDUSTRIAL GASES AND THE CATALYST PREPARED BY THIS METHOD

The catalyst for the removal of nitrous oxide from waste industrial gases at the reaction temperatures of 300 up to 450 °C is prepared as follows: at first, impregnating solution consisting of aqueous solution of cobalt (II) nitrate at the concentration of 660 up to 1,980 g/l, caesium nitrate at the concentration of 2,4 up to 85,8 g/l and glycerol at the concentration of up to 990 g/l is prepared, stirred and heated up to the temperature of 60 up to 80 °C. Subsequently, ceramic foam is submerged into the impregnating solution for a period of at least 20 minutes, then dried for 4 h and at the temperature of 105 °C and calcinated for 4 h in the air at the temperature of 500 °C. An active layer of the catalyst consisting of Co3O4 is formed on the surface of the ceramic foam with a Cs alkaline promoter (Co3O4-Cs).