| 摘要 |
PROBLEM TO BE SOLVED: To provide the oxide catalytic material which is capable of directly decomposing NO contained in exhaust gas of a stationary emission source such as a factory and a power plant and of a mobile emission source represented by an automobile into N2 and O2 even in the conditions of exhaust gas of the oxidative atmosphere at high temperature reaching 800 deg.C exceeding 600 deg.C without using a reducing agent and to provide the removing method for nitrogen oxide by using the oxide catalytic material. SOLUTION: The oxide catalytic material for removing nitrogen oxide consists of oxide containing Ga and Pd as the principal metallic elements and is mainly constituted of crystalline phase of PdO and β-Ga2 O3 , and atom ratio (Ga/Pd) of Ga and Pd contained in the above-mentioned oxide is 1.0-5.0. The oxide catalytic material for removing nitrogen oxide is brought into contact with oxidative exhaust gas containing NO to directly decompose NO contained in exhaust gas into N2 and O2 without using a reducing agent. |
