What is PSA and how does it work?
Ans. PSA stands for pressure swing adsorption. It is only a physical process of separating molecules. Compressed air is used to pressurize a vessel. The vessel is filled up with either carbon or zeolites. They actually sift molecules by physical or structure. The process is like this as air is forced into the pressure vessel or sieve bed it causes gas molecules to be trapped in the sieve. While the unwanted other gas floats freely in the bed. After some time, a bit of the pressure is released in the sieve bed. These draws off molecules of the wanted gases and gets collected in a storage tank for use. Further a valve is opened in the sieve bed and all the pressure is released. This opening forces out the captured molecules of the unwanted gases and readying the sieve for another cycle. Thus molecules of gas that are released into the air immediately combine again to form air s ambient percentages.
