Synthesis GasSyngas (synthesis gas, oxogas), a mixture of H2 and CO, is produced by the steam reforming and partial oxidation of hydrocarbons or a combination of both processes (tandem reforming).

The desired H2/CO ratio can be adjusted by conversion or H2/CO separation. Linde plants supply syngas with an H2/CO relationship of from 1.6 and a capacity of from 1,000 Nm³/h to over 100,000 Nm³/h.

Syngas is utilized in the production of oxo alcohols, methanol or synthetic fuel (Fischer-Tropsch products).


The feedstocks natural gas, liquid gas and naphtha are generally converted by catalytic steam reforming to a raw synthesis gas consisting of hydrogen (H2) and carbon monoxide (CO). This is then further processed depending on the desired final products. In the case of pure hydrogen, the process includes such features as the catalytic conversion of the CO and a pressure swing adsorption unit, in which all impurities are removed in a single step.

Synthesis Gas Production with Steam Reforming

Heavy oil feedstock ranging from residual oil to asphalt as well as coal are partially combusted with oxygen in a non-catalytic partial oxidation to produce a raw gas, which is then further processed into saleable products. Here, such process steps as CO conversion, sour gas removal with a RECTISOL® wash and membrane separation of H2 and CO are used.

Synthesis Gas Production with Partial Oxidation

In plants for the purification of hydrogen and carbon monoxide both chemical and physical wash processes are used to remove the carbon dioxide, as well as low-temperature processes for product purification with a downstream pressure swing adsorption unit to produce high-purity hydrogen.


Synthesis gas plant for Celanese, at Night, Oberhausen, Germany
Partial Oxidation, CO2 Wash, Membrane Separation, PSA

Natural Gas


28,000 Nm³/h60,000 Nm³/h
25.1 mmscfd53.8 mmscfd




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