| http://www.w3.org/ns/prov#value | - For instance, it is thereby possible to separate mainly carbon monoxide in high yield from a synthesis gas obtained by the steam reforming or partial oxidation of hydrocarbons such as natural gas, light naphtha or heavy oil, or from a gas mixture containing carbon monoxide, which is obtainable as a by-product gas from the gasification of coal or iron making, and to use the carbon monoxide thus obt
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