The Reason For A Catalytic Converter
Since the beginning of emission regulations, the focus has been primarily directed at reducing hydrocarbons, carbon monoxide, and nitrogen oxides. Hydrocarbons are organic compounds of hydrogen and carbon which when exposed to sunlight and nitrogen oxides, react to form oxidants which can irritate mucous membranes, and in some forms are considered carcinogenic. Carbon Monoxide is a colorless, tasteless , and odorless gas produced by the incomplete burning of carbon, which if inhaled with a volumetric concentration of 0.3% would result in death in 30 minutes. More than 90% of the carbon monoxide emitted in cities comes f rom motor vehicles. Nitrogen monoxide is a colorless, tasteless gas produced by the internal combustion engine, but when exposed to air becomes N02. Pure N02 is a poisonous reddish-brown gas that can irritate mucous membranes. NO and N02 are sometimes referred together as nitrogen oxides (NOx) and are responsible for photochemical smog and acid rain. These represent the majority of toxic and environmentally detrimental gases in automotive engine exhaust.