| abstract |
PURPOSE: To simultaneously clean up CO and NO 2 in a waste gas at 300W900°C by melting and uniting a catalyst component down to 100μm depth from the surface of a carrier contg. a lanthanide oxide thereby depositing said component on the carrier. n CONSTITUTION: The catalyst mixture composed of platinum or palladium and lanthanide oxide is deposited on the carrier such as honeycomb type porous ceramic carrier molded of calcium aluminate, silicon dioxide, titanium dioxide, etc. down to about 100μm depth from the surface thereof. The carrier is then subjected to a heat treatment in a 300W1,100°C temp. range by which the catalyst melted and united with the carrier and deposited catalyst for cleaning up of the waste gas is produced. The harmful materials in the waste gas are efficiently cleaned up by installing such catalyst into the waste gas flow passage of a combustion apparatus. n COPYRIGHT: (C)1987,JPO&Japio |