1.2.1 Two - way or oxidation catalytic converterIn two way catalytic converter, it will control the emission of two different toxic sources. The carbon monoxide and hydrocarbons will be converted into carbon dioxide and water.1) Oxidation of carbon monoxide to carbon dioxide:2CO + O2 → 2CO22) Oxidation of hydrocarbons to carbon dioxide and water:4HC + 5O2 → 4CO2 + 2H2OThe two way catalytic converter is superseded by three-way converters because of their inability to control oxides of nitrogen.