♦ IIT-Bombay’s pilot project to convert a PSA (Pressure Swing Adsorption) Nitrogen Unit to a PSA Oxygen Unit has been successfully tested.
♦ Oxygen can be produced at 3.5 atm pressure, with a purity of 93%-96%.
♦ By providing a continuous supply of oxygen, this gaseous oxygen can be used for COVID-related needs in existing hospitals and upcoming COVID-19 dedicated facilities.
How to convert a nitrogen unit to an oxygen unit?
♦ Finished by fine-tuning the existing nitrogen production equipment and changing the molecular sieve from “carbon” to “zeolite”.
♦ The pilot project is a joint effort between Tata Consulting Engineers IIT Mumbai and Spantech engineers in Mumbai, who are responsible for the production of PSA’s nitrogen and oxygen plants.
About Pressure Swing Adsorption:
♦ Pressure Swing Adsorption is a technique for isolating specific gas species from mixtures of gases under pressure.
♦ PSA operates at close to ambient temperature (temperature related to the surrounding environment), which is very different from cryogenic distillation technology for gas separation.
♦ Cryogenic separation is a commercial process carried out at very low temperatures.