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WhatsApp / Mob : +86 156 5177 2521
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Email : mrwin@cnbangwin.com
WhatsApp / Mob : +86 156 5177 2521
Email : mrwin@cnbangwin.com
Cryogenic Air Separation Plant: Technology for Large-Scale Industrial Gas Production
Mar 18 , 2026Oxygen, Nitrogen, and Argon are industrial gases that are utilized heavily in today’s manufacturing and energy markets. Common processes that require these gases include steel making, chemical production, electronics fabrication, and medical use.
The most common technology for supplying large quantities of high purity industrial gases is a Cryogenic Air Separation Plant. Air is cooled to cryogenic temperatures which allows oxygen, nitrogen, and argon to be separated from each other by distillation.
The popularity of cryogenic air separation is due to its efficiency and ability to produce extremely pure gases.
Recommended internal pages for SEO structure:
l Liquid Oxygen Plant
l Liquid Nitrogen Plant
l PSA Nitrogen Generation System
A Cryogenic Air Separation Plant, also known as an ASU, is an industrial facility used to produce large quantities of the primary components of atmospheric air.
l Nitrogen
l Oxygen
l Argon
These three gases make up 99% of the air we breathe with nitrogen representing about 78%, oxygen 21%, and argon about 1%.
A cryogenic air separation plant works by cooling atmospheric air until it liquefies. Since each gas has a different boiling point, they will separate from each other in a distillation column.
Industrial gases can be produced in either liquid or gaseous states. When produced in liquid form from a cryogenic air separation plant the gas will be:
l Liquid Oxygen or LOX
l Liquid Nitrogen or LIN
l Liquid Argon or LAr
The cryogenic Air Separation process is as follows.
l Air Compression
Ambient air is fed into the compressor where it gets compressed to a high pressure. This air is then sent for purification and cooling.
l Air Purification
This unit helps remove moisture, carbon dioxide, hydrocarbons from the air. If these are not removed they will freeze up in our cryogenic system.
l Cryogenic Cooling
The dry air passes through the heat exchanger where it gets cooled to cryogenic temperatures. Temperatures lower than usually −180°C.
l Liquefaction
Low temperature turns the air into liquid form. The liquid air is now pumped into a distillation column.
l Fractional Distillation
Each gas has its own boiling point. This causes the gases to separate in the distillation column:
1. Nitrogen boils at −196°C
2. Argon boils at −186°C
3. Oxygen boils at −183°C
l Gas Storage
The produced gases are sent to cryogenic storage tanks or sent through as pipeline gases.
The following systems are included in the structure of any modern cryogenic plant.
l Air compressor
l Air purification system
l Main heat exchanger
l Cold box
l Rectification columns
l Tank of liquid oxygen
l Tank of liquid nitrogen
l Argon purification system
l Control system and automatic device
All the above systems interact and complement each other and function to provide stable continuous production of gases.
There are several types of cryogenic plants depending on their capacity.
l Small Cryogenic Plants
Such plants are used for hospitals, laboratories, small industrial enterprises.
l Medium Industrial Plants
Provide supply to manufacturing plants, industrial zones.
l Large Cryogenic ASU Plants
Plants with large capacity are used in steel mills, petrochemical complexes, large energy projects.
Industrial plants can produce tens of thousands cubic meters of various gases per hour.
Some advantages of cryogenic air separation are listed below.
l High Purity Product Gas
Cryogenic Plants can produce Oxygen and Nitrogen gas with purity levels of :
l Higher than 99.6% for Oxygen
Higher than 99.999% for Nitrogen
l Large Sized Capacity
Cryogenic Plants have large capacities that meet high industrial gas demands.
l Multi Product Capability
Separate oxygen, nitrogen, and argon in one plant.
l Designed for Continuous Service
Providing industrial plants with around the clock service.
Cryogenic air separation plants are used throughout numerous industries. Here are some of the largest industries that use cryogenic air separation technology.
l Steel industry
l Metallurgical industries
l Petrochemical industries
l Chemical industry
l Electronics
l Glass
l Medical Oxygen
l Power plants
As you can see, oxygen and nitrogen are in very high demand. Cryogenic Air Separation plants will continue to play a vital role in industry.
Determining factors include:
l Demand of Gas
Size the plant according to gas demand of the facility.
l Need of Gas Purity
Requirement of very high purity gases.
l Energy Consumption
It will help you to determine your operating cost.
l Space Availability
Need enough space for installing bulky cryogenic plants.
Consulting with manufacturers and experienced suppliers you will get the right plant configuration.
Bangwin Gas is an Industrial gas production Equipment manufacturer and Cryogenic Engineering company.
Services include:
l Cryogenic air separation plant
l Liquid oxygen plant
l Liquid nitrogen plant
l VPSA Oxygen plant
l PSA nitrogen generator
l Cryogenic storage tank
Visit here- https://bangwingas.com/
Engineering services include turnkey project from design to installation and commissioning of the plant.
Authoritative references:
l International Gas Union
https://www.igu.org
l Air Liquide Industrial Gas Technologies
https://www.airliquide.com
l Linde Engineering
https://www.linde-engineering.com
l Q.No.1 What is cryogenic air separation plant used for?
Ans.It is used to separate air into oxygen, nitrogen, and argon.
l Q.No.2 What purity level can cryogenic air separation provide?
Ans.Cryogenic air plants can supply oxygen with purity levels greater than 99.6% and nitrogen with purity levels greater than 99.999%.
l Q.No.3 In which industries are cryogenic air separation plants used?
Ans.The Steel industry, Petrochemical industry, Electronic industry, Pharmaceutical industry uses cryogenic air separation plants..
l Q.No.4 What temperature is cryogenic separation done at?
Ans.The Cryogenic air separation process works below the temperature of −180°C.
l Q.No.5 Can Cryogenic plants supply liquid gases?
Ans.Yes, cryogenic air separation plants can supply Liquid Oxygen, Liquid Nitrogen, and Liquid Argon.
Cryogenic Air Separation Plant plants are most suited for large scale production of industrial gases with highest purity.As these plants separate Oxygen, Nitrogen, and Argon from the air through low temperature distillation.They assure you uninterrupted supply of industrial gases.
Don’t worry about efficiency or long term reliability when you buy state of the art gas plants from Bangwin Gas.
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