Device for purificn. of IC engine exhaust gases - comprises activated solid surface composed of earth and/or clay in the form of porous discs

摘要

Device comprises at least an activated surface solid on which chemical reaction of the gaseous components can occur. The activated surface is composed at least partially of earth and/or clay (20). In a pref. material mixt., the earth/clay is synergised by addn. of metallic oxide, partic. Fe oxide. The surface area/porosity of the material can be increased by an excess of gypsum. USE/ADVANTAGE - Used for purificn. of I.C. engine exhaust gases. A cheaper and disposable alternative to Pt metal catalysts in converters for exhaust emission redn..