VEHICLE EXHAUST GAS SYSTEMS

摘要

A chromium-contg. tin oxide catalyst compsn. (A) comprises the prod. obtd. by impregnating tin (IV) oxide (SnO2) with chromium (VI) oxide (CrO3), and calcining the impregnated prod. A catalytic converter for vehicle exhaust system comprises catalyst (A). A method for (a) the catalytic oxidn. of carbon monoxide and/or (b) the catalytic oxidn. of hydrocarbons and/or (c) the catalytic redn. of nitrogen oxides in a gaseous medium comprising contacting the latter with catalyst (A).