EnerProcess designs, manufactures and constructs multi-product cryogenic and Non -cryogenic Air Separation Units (ASU) producing nitrogen, high-purity oxygen and argon. EnerProcess is also a manufacturer and supplier of single-product cryogenic oxygen plants and cryogenic nitrogen plants. Enerprocess air separation plants, nitrogen gas plants and oxygen gas plants can be supplied with stand-alone or fully integrated liquefier units to produce large quantities of liquid nitrogen and liquid oxygen for in-plant use and for bulk liquid products distribution.
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Cryogenic Air Separation Units

Cryogenic Air Separation Units

Cryogenic air separation processes rely on differences in boiling points to separate and purify products.
All cryogenic processes include these steps:

  • Filtering and compressing air
  • Removing contaminants, including water vapor and carbon dioxide (which would freeze in the process)
  • Cooling the air to very low temperature through heat exchanger and refrigeration processes
  • Distilling the partially-condensed air (at about -300˚F / -185˚C) to produce desired products
  • Warming gaseous products and waste streams in heat exchangers that also cool the incoming air stream

Cryogenic processes are the most cost effective separation process for producing at high production rates and are capable of making the highest purity products.

PSA Units

PSA Units

Non-cryogenic air separation processes are most likely to be a suitable and cost effective choice when high purity product is not required and/or when the required production rate is relatively small. Systems belong to one of two major technology categories: adsorption processes and membrane diffusion-separation systems. Adsorption-based processes may be described using a number of generic names (Pressure Swing Adsorption or PSA, Vacuum Swing Adsorption or VSA, Vacuum-Pressure Swing Adsorption or VPSA) or by trade names. The same holds true for Membrane separation systems. PSA, VSA and VPSA systems use differences in adsorption of gases on specially-fabricated materials to make the desired separations. Different adsorbents are used for oxygen and nitrogen generation, but the physical appearance and operating principles of the systems are similar. Membrane systems use differences in diffusion rates between, for instance, oxygen and nitrogen or hydrogen and CO2 through the walls of specially designed and fabricated hollow polymer tubes.