PURPOSE: To provide a catalyst capable of directly decomposing NOx into N2 and O2 to purify waste gas without using a reducing agent by adding thulium to the catalyst carrying palladium.
CONSTITUTION: The catalyst is obtained by dissolving a compound containing palladium, such as palladium nitrate, palladium acetate, etc., and a compound containing thulium, such as thulium nitrate, etc., with a solvent, such as water, acetone, etc., and impregnating or ion exchanging the catalyst carrier with the solution, drying and calcining. For example, a Pd/Mg Al2O4 catalyst containing 1wt.% palladium is impregnated with a thulium nitrate aq. solution, dried by use of an evaporator, and then, calcined at 500°C in air to form the catalyst containing palladium and thulium at equal mol.
KOBUCHI TAMOTSU
MIZUNO KOICHI
OI AKIHIKO
OUCHI HIDEO
| JPS60238147A | 1985-11-27 | |||
| JPS63173866U | 1988-11-11 | |||
| JPS61127650U | 1986-08-11 |