A Review Paper on Exhaust Gas Treatment System

Mechanical Engineering

Air pollution and heating are the two biggest threats to human and animal health. Energy insecurity and economic process of standard energy sources also are major threats to economic and political stability. Many alternatives to standard energy sources are projected, however, analyses of such choices are restricted broad and depth. Indoor plus outdoor air pollution is the sixth-leading cause of death, WHO estimates that around 7 million people die every year. Air pollution also increases asthma, respiratory illness, cardiovascular disease, cancer, hospitalizations, emergency-room visits, work-days lost, and school-days lost all of which decrease economic output, divert resources, and weaken the security of nations. Global warming increase the heat stress, disease, severity of tropical storms, the acidity of the ocean, sea levels, and the melting of glaciers, snowpack, and sea ice. Further, it shifts the situation of viable agriculture, harms ecosystems and animal habitats, and changes the temporal order and magnitude of installation. This project aims to reduce as well as vanish air pollution created from automobile, industry and thermal power plant by introducing the exhaust gases into liquid nitrogen. The exhaust gases coming from engine or plant is stored and cooled instead of ejecting it to the atmosphere, this exhaust gas mainly consists of carbon dioxide gas, carbon monoxide, methane gas, hydrocarbons, nitrogen oxide gas. The liquid nitrogen having a temperature -196 ℃ is subjected to vacuum. As pressure decreases the temperature decreases and it becomes solid-liquid nitrogen and when gases pass through it, it is expected that the carbon dioxide and carbon monoxide will become solid as they have a surface temperature -75.8 ℃ and collected at the base. The nitrogen oxide gas will become liquid when it comes in contact with solid nitrogen.

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