Carbon dioxide removal from air-A state of the art review (original) (raw)

Atmospheric air is an important part of human habitat. Because of the inventions in advanced technologies in many areas certain impacts on environment are observed. One of the concerned impacts is air pollution. The atmospheric air constitutes many elements, one of that is CO2. It is introduced in air from many sources like power plants, automobiles etc. and we are aware about the fact that CO2 is undesirable and harmful to all human beings. In this paper, an attempt is done to focus the lamp on the work done to remove hazardous gases like CO2, SO2, and NOx from atmospheric air. Different investigators worked on different methods for removal of these gases and these techniques are also discussed. The MEA (mono-ethylene-amine) process is also studies along with its drawbacks. Investigators are now switching from MEA process to aqueous ammonia process. The process parameters in ammonia process and its result analysis are also discussed here. Still the research community is facing many...