Air from the atmosphere is the raw material used in this cryogenic (very low temperature) air separation plant. Atmospheric air is purified and then separated into the products of an air separation unit. These products may be nitrogen, oxygen, and argon in gaseous and/or liquid form depending on the plant design and the needs of the customer.
An air separation plant separates atmospheric air into its primary components, typically nitrogen and oxygen, and sometimes also argon and other rare inert gases.
The most common method for air separation is fractional distillation. Cryogenic air separation units (ASUs) are built to provide nitrogen or oxygen and often co-produce argon. Other methods such as membrane, pressure swing adsorption (PSA) and vacuum pressure swing adsorption (VPSA), are commercially used to separate a single component from ordinary air. High purity oxygen, nitrogen, and argon used for semiconductor device fabrication requires cryogenic distillation. Similarly, the only viable sources of the rare gases neon, krypton, and xenon is the distillation of air using at least two distillation columns.
Other Industrial Gas Ammonia (NH3) Hydrogen (H2) Acetylene (C2H2) Helium (He) Laser gas Various standard gas Zero span gas