Prevention of Exhaust from Gasoline and Diesel Engines

Abstract

Typical road, rail, air and water transport results in exhausts that are harmful to living beings. Hence the pollutants must be filtered before it is released into the atmosphere. Various filtering methods are implemented to decontaminate the pollutant substances such as nitrogen, sulphur and carbon. Several approaches are enacted by the government too where the vehicles are permitted to discharge the exhaust within the specified limits. When these limits are strictly followed, air pollution can be limited to a certain extend. Still these approaches may not be utmost effective, unless the exhausts are filtered and thus this article deals with the available filtering techniques. Since nitrogen oxide is the most pollutant substance among other emissions, methods like Exhaust Gas Recirculation (EGR), Selective Catalytic Reduction (SCR), Diesel Particulate Filter (DPF), Lean Nitrogen Oxides Trap (LNT) techniques etc. are carried out to eliminate it.