Cryogenic air separation process is one of the most popular air separation process, used
frequently in medium to large scale plants. It is the most preferred technology for producing
nitrogen, oxygen, and argon as gases and/ or liquid products and supposed to be the most
cost effective technology for high production rate plants. In today's market scenario, all
liquefied industrial gas production plants make use of cryogenic technology to produce
liquid products.
There are different variations arising from differences in user requirements in the cryogenic
air separation cycles to produce industrial gas products. The cycle of processing depends on:
• How many products are required (whether simply oxygen or nitrogen, both oxygen
and nitrogen, or nitrogen, oxygen and argon).
• Required purities of the products.
• Gaseous product delivery pressures.
• Lastly whether the products need to be stored in Liquid form.