| 摘要 |
PURPOSE:To use a heat-resistant durable catalyst in a cooker to enable it to completely decompose the smoke and hydrocarbon products generated during the heat cooking by making a secondary radiant material of inorganic heat-resistant fiber cloth support, at a position facing an exhaust vent, a composite oxide catalyst of Mn, Cu, and Ce and obtained by thermal decomposition of coprecipitation products. CONSTITUTION:For example, in the grill section of a gas table with a grill, a secondary radiant material 7 provided close to a burner 10 is a cloth knitted from inorganic heat-resistant fibers and made to support a composite oxides-catalyst based on Mn, Cu, and Ce. Almost simultaneously with ignition of the burner 10 the secondary radiant material 7 becomes red heat at positions close to the flame, causing a severe corrosive environment, but the cloth of inorganic heat-resistant fibers in use poses no problem with respect to resistances to heat, corrosion, and the like. The cloth is made to support said composite oxide catalyst, for example, by impregnating silica cloth with aqueous solutions of nitrates of Mn, Cu, and Ce by steep and then by soaking it in an aqueous solution of NaOH to cause coprecipitation, followed by washing, drying, and thermal decomposition for two hours at 450 deg.C. It is desirable for the catalyst to be supported at a position facing an exhaust vent 5. In place of said metallic salts an acetate, a carbonate, an ammonium salt, and the like can be used; an alkali, sodium carbonate, and the like are also useful. |
