Removal+of+Pollutants

Removal of Pollutants
Links: http://www.youtube.com/watch?v=rmtFp-SV0tY
 * Catalytic converters ** - devices attached to a vehicle's exhaust system to convert carbon monoxide and nitrogen oxides into water and carbon dioxide.


 * Thermal Exhaust reactor ** - unburnt hydrocarbons and carbon monoxide is reace with excess oxygen and convertd to carbon dioxide.


 * Lean Burn Engines ** - A higher ratio of oxygen is mixed with the hydrocarbon petrol so that the chances of carbon monoxide being produced is greatly reduced.Unfortunately ths causes greater nitrogen oxide emissions


 * Scrubbers ** - Pollutant-laden air mainly from the combustion of sulfur rich coal is passed through a mixture if water and lime (calcium oxide),trapping particulates and sulphur oxide gases. Another method called fluidized bed combustion invovles burning the coal on a bed of limestone to remove sulfur.


 * Sedimentation chamber and electrostatic precipitation** - Larger particles in smoke are caught in the sedimentaiton chamber whilst smaller particles are charged and attracted to an oppsitely charged electrode in a precipitation chamber.