The invention relates to a preparation method for a formed catalyst for directly catalyzing N2O to decompose, and belongs to the technical field of environment protection catalytic materials and
air pollution control. According to the catalyst, a compound material is used as a carrier to load
metal oxide. The main
active components are oxides of Zn and Ni, and one or two types from the oxides of Cu, Fe, Sr, La, Co, K, Na, Zr, Y or Ba are simultaneously loaded. The catalyst is characterized in that the compound material comprises two or more substances including clay,
active carbon,
bakelite powder,
sesbania powder, special pseudo-
boehmite powder, SiO2, TiO2, ZrO2, sandy soil and
zinc oxide; the catalyst is columnar, clover-shaped or takes the shape of
geranium nepalense sweet; the external
diameter is 1-20 mm. The
metal oxides accounts for 30-55% of the total weight of the catalyst, wherein the
nickel oxide accounts for 1-5%, and the
zinc oxide accounts for 30-45%. The catalyst can be widely used for removal and decomposing of N2O in a nitric
plant, an
adipic acid plant and other industrial process generating N2O.