PSA vs VSA (Pressure /Vacuum Swing adsorption)
PSA vs VSA (Pressure /Vacuum Swing adsorption)
(OP)
Dear all
Can anyone explain me the differences between PSA (Pressure Swing adsorption) and VSA (Vaccum Swing Adsorption), and when these processes can be applied, because i think these 2 process have some functions such as CO2 Removal in H2 Production, are there any special condition required.
Thank you for Your comment and opinion
best regards
Zachari Alamsyah
Can anyone explain me the differences between PSA (Pressure Swing adsorption) and VSA (Vaccum Swing Adsorption), and when these processes can be applied, because i think these 2 process have some functions such as CO2 Removal in H2 Production, are there any special condition required.
Thank you for Your comment and opinion
best regards
Zachari Alamsyah





RE: PSA vs VSA (Pressure /Vacuum Swing adsorption)
VSA is a process commonly used to remove Oxygen from air. The pressure cycles from very low positive pressure down to vacuum. In each process, the gas is feed thorugh vessels pack with material that adsorb impurities at one pressure, then release them at a lower pressure. When adsorbing, nearly pure product flows out the top of the vessel. Once the vessel is nearly saturated with impurities, the vessel is isolated and the pressure changed so the impurities are released and flushed from the vessel so it can be used to purify again. They are both cyclical processes that usually use multiple vessels so there is always on that is producing purified product.
In PSA, the pressure is always postive. In VSA (or sometimes called VPSA), the pressure changes from positive to negative.
RE: PSA vs VSA (Pressure /Vacuum Swing adsorption)