| 摘要 |
PURPOSE:To remove NO2 at low temp., by using a NO2 removing agent prepared by compounding one or more kinds of an alkali metal and one or more kinds of an element selected from a transition metal containing an element of the Group IIB of the Periodic Table and tin with carbon being a main component. CONSTITUTION:A NO2 removing agent is prepared by supporting carbon being a main component, one or more kinds of an alkali metal and one or more kinds of an element selected from a group consisting of a transition metal containing an element of the Group IIB of the Periodic Table and tin by a heat resistant ceramic carrier composed of silica, alumina, magnesia or silicon carbide. This NO2 removing agent especially has effect for removing NO2 in gas at room temp. -400 deg.C and the reduction of said effect is low even when oxidizable gas such as oxygen is contained in the gas. NO2 removing action by the adsorption of NO2 and/or the reduction of NO2 to NO is remarkable within a low temp. range of room temp. -150 deg.C. |
