The global air separation plant industry is poised for steady and sustained growth, driven by robust demand from the iron and steel sector, expanding applications across energy and healthcare, and a growing shift toward low-carbon and rare gas production capabilities. According to Kings Research, the global Air Separation Plant Market was valued at USD 5.57 billion in 2024, estimated at USD 5.81 billion in 2025, and is projected to reach USD 8.05 billion by 2032, growing at a CAGR of 4.78% during the forecast period.
Market Overview
Air Separation Plants: Critical Infrastructure Serving Steel, Energy, and Healthcare
Air separation plants are industrial systems designed to separate atmospheric air into its primary components — oxygen, nitrogen, and argon — using cryogenic and non-cryogenic processes to achieve high purity levels for industrial applications. These facilities serve an extraordinarily wide range of end uses, from metal manufacturing and chemical synthesis to medical oxygen generation and semiconductor-grade rare gas production. Their central role in industrial supply chains makes them an essential infrastructure investment across multiple high-growth sectors globally.
Key Market Drivers
Steelmaking Oxygen Demand and Rare Gas Applications for Semiconductors Accelerate Growth
The iron and steel industry represents the largest and most consistent source of demand for air separation units globally. Oxygen is a critical input in blast furnace operations and basic oxygen furnaces, where it supports combustion efficiency and removes impurities from molten metal. In January 2025, INOX Air Products commissioned its largest-ever air separation unit with an installed capacity of 2,150 tons per day at Steel Authority of India’s Bokaro Plant. The growing preference for high-purity rare gases — argon, neon, krypton, and xenon — in semiconductor manufacturing is also emerging as a significant market trend. In August 2024, POSCO Holdings and Zhongtai Cryogenic Technology launched a joint venture to build a rare gas production facility in Gwangyang, South Korea.
Sustainability and Innovation Trends
Renewable-Powered ASUs and Low-Carbon Hydrogen Projects Drive Green Transition
Sustainability imperatives are reshaping the air separation plant market. Operators are increasingly integrating renewable energy sources — including solar and wind power — into the electricity supply for these energy-intensive facilities, reducing their carbon footprint and aligning with global emission reduction commitments. In June 2024, ExxonMobil and Air Liquide entered into an agreement to produce low-carbon hydrogen and ammonia, including the construction of four large modular air separation units powered primarily by low-carbon electricity. In August 2025, Linde announced plans to invest USD 100 million in an air separation plant in Brownsville, Texas, to supply liquid oxygen and nitrogen for SpaceX’s Starship program.
Segmentation Analysis
Cryogenic Process and Oxygen Gas Lead Dominant Market Segments
By process, the cryogenic segment dominated the market with revenues of USD 3.59 billion in 2024, reflecting its ability to deliver high-purity gases at large industrial scales. Non-cryogenic methods, such as pressure swing adsorption, serve smaller-scale and purity-flexible applications. By gas, the oxygen segment held the largest share of 52.40% in 2024, owing to its extensive use in steelmaking, chemical processing, and medical applications. By end-use industry, the iron and steel segment is projected to reach USD 2.98 billion by 2032. Asia-Pacific dominated the market with a 47.60% share in 2024, valued at USD 2.65 billion.
Competitive Landscape
Long-Term Supply Agreements and World-Scale Investments Define Market Leadership
Key companies include Linde PLC, Air Liquide Engineering & Construction, Air Products and Chemicals, Mitsubishi Heavy Industries, Messer, INOX-Air Products, MATHESON Tri-Gas, POSCO Holdings, Universal Industrial Gases, Cryostar, NIKKISO, Sanghi Oxygen, Honeywell International, AIR WATER INC., and Technex. In June 2025, Linde announced a long-term agreement to supply industrial gases to a CF Industries, JERA, and Mitsui & Co. joint venture, committing more than USD 400 million to build a world-scale air separation unit in Louisiana. Kings Research’s comprehensive analysis provides the strategic market intelligence required for stakeholders to capitalize on this expanding industrial opportunity.
About Kings Research
Kings Research is a leading market research and consulting firm providing in-depth analysis of global markets across diverse industries. Our reports deliver actionable insights that empower businesses to make data-driven decisions and capitalize on emerging opportunities.
