| 摘要 |
PURPOSE:To obtain stable and efficient deodorizing effect over a long period of time, by using a honeycomb catalyst having a specific shape and introducing ozone into malodorous component-containing gas to catalytically decompose and remove the malodorous component. CONSTITUTION:In the shape of a catalyst, a honeycomb catalyst wherein the diameter of each piercing hole is 0.7-3mm, the wall thickness of each cell is 0.2-0.5mm and an opening ratio is 50% or more is used and ozone is introduced into malodorous component-containing gas and the malodorous component is catalytically decomposed and removed. When the diameter of each piercing hole of the catalyst is below 0.7mm, pressure drop rises and the closure due to the dust in the gas to be treated is easy to generate and, when said diameter exceeds 3mm, the lowering of a deodorizing ratio and the decomposition efficiency of unreacted ozone is brought about. The malodorous component-containing gas having ozone introduced thereinto is brought into contact with the catalyst layer at a flow speed of 0.2-40m/sec. The composition of the honeycomb catalyst consists of a component A and a component B: the component A is composed of composite oxide of titanium and at least one kind of silicon, zirconium and phosphorus, and the component B is composed of at least one element selected from manganese, iron, cobalt, nickel, silver, platinum, palladium and rhodium. |
