Today, the overwhelming majority of vehicles is equipped with internal combustion engines that use fossil derived fuels. Catalytic converter is a device used to reduce the toxicity of emissions from internal combustion gasoline engines. The catalytic active material is integrated into a porous substrate through which the exhaust gases (hydrocarbons, carbon monoxide and nitrogen oxide) flow. The precious metals subsequently react with the exhaust gases, rendering them harmless. The entire structure is shielded by a metal housing.
Dan Florian, Catalysators. Construction, work and flow, S.E.I.P. Cluj.
Framework Directive 96/62/EC, to improve air quality.
Nicu, V., Elemente de poluare şi protecţie a atmosferei, Editura UTI, Bucureşti, 2000