Onsite Gas Production

10_onsite plant for air separation

Onsite plants often make sense for large consumers of oxygen, nitrogen, hydrogen, syngas, CO or other gases.


Onsite Gas Plants for Production of Hydrogen, Syngas, Carbon Monoxide, Oxygen, Nitrogen, Argon.

MATHESON provides a total solution for large scale gas needs. Onsite supply of oxygen, nitrogen, hydrogen, syngas, CO or other gases makes sense for large gas requirements. Let MATHESON help provide these requirements, reliably, affordably and safely!

We can help you determine if onsite gas production is a cost effective alternative to bulk or pipeline gas delivery. If onsite production is an approach that is right for you, we can help you determine the scale and technology that make sense for your application.

Syngas, Hydrogen, and CO.smr plant for syngas or hydrogen

MATHESON can also help you with the design and scale of plants for production of syngas, hydrogen, or CO. We can help you determine which technology (SMR, ATR, POX) is best suited for your use, and then coordinate the design, construction, and operation of the facility.

Atmospheric Gases.

TNSC and MATHESON together are known globally for advanced air separation (ASU) know-how, and we can put that technology to work at your facility.

MATHESON can design, build, and operate cryogenic ASUs for atmospheric gases (nitrogen, oxygen, argon). For smaller scale requirements, we can do the same for non-cryogenic air separation plants (nitrogen and oxygen).

Other Gases.

We can also help with the design and integration of other gas systems and subsystems for gas control (such as CO2, helium, or N2O), or production (such as compressed dry air - CDA).

Every Onsite Project.

Our plants are built for your specific flow, purity, and capacity requirements. Every project targets low energy consumption, simple maintenance, and efficient operation.



Technologies for Hydrogen, CO, and Syngas Production

syngas production technologies bar chart

Steam Methane Reformer (SMR)

SMR is one of the predominant technologies for producing raw syngas (a gas mixture of hydrogen and carbon monoxide). Where only pure H2 is required as product, a water gas shift step is employed using steam as reactant to convert most of the CO in raw syngas to CO2 and additional H2.

Autothermal Reactor (ATR) 

ATR technology is also catalytic but requires less steam than SMR and as a result produces lower R value syngas. It also requires vapor hydrocarbon feeds.

Partial Oxidation (POX)

Partial Oxidation is based on providing the heat of reaction via internal combustion of part of the feedstock with O2. The reactor can use natural gas, LPG, naphtha, asphalt, residual oil, petrol coke, or coal as feedstock.

Read more about SMR, ATR, and POX.



Technologies for Oxygen, Nitrogen, and Argon Production

Cryogenic or Non-Cryogenic Air Separation

Production of oxygen, nitrogen, and argon is done by air separation. Cryogenic air separation is capable of producing large quantities of high purity gas and/or liquid phase product, which is then easily stored or used.

Non-cryogenic air separation is conducted near ambient temperature, so the product - oxygen or nitrogen - is always gas phase. Production quantity and purity in non-cryogenic air separation are not as high as the quantity and purity attainable with cryogenic air separation.

Read more about Air Separation Technologies.


air separation plant with storage tank, cold box tower, and tanker truck

MATHESON, together with parent company Nippon Sanso Holding Corporation (NSHD), offers over 75 years of globally-recognized leadership in ASU design, fabrication, and operation.



Interested in starting a dialogue about onsite gas production?

Contact the Engineering Experts directly.


Our Onsite Gas Production Technologies

MATHESON expertise can work for you in the development of onsite gas production facilities:

  • Cryogenic Air Separation
  • Non-cryogenic Air Separation
  • Steam Methane Reforming (SMR)
  • Autothermal Reforming (ATR)
  • Partial Oxidation (POX)
  • Compressed Dry Air (CDA)
  • Cryogenic Liquid Storage
  • Gas Storage
  • Gas Production Subsystems


MATHESON delivers these services for onsite gas production facilities:

  • Feasibility Evaluation
  • Design
  • Construction Services
  • Startup Services
  • Operation (including staffing)
  • Maintenance
  • Upgrades


Also see:

SMR, ATR, POX Technologies

Air Separation Technologies