Importance

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Abstract

A process for the production of a fuel gas which includes the steps of: hydrogentation of a liquid hydrocarbon or solid carbonaceous material in the presence of air and optionally steam to produce a raw fuel gas stream comprising methane and unreacted hydrogen, gasification of a liquid hydrocarbon or solid carbonaceous material in the presence of air and optionally steam to produce a second gas stream comprising hydrogen, nitrogen and carbon oxides, removing solids therefrom from the gas streams, mixing the fuel gas stream with the second gas stream and with steam and subjecting the resulting stream to carbon monoxide shift to convert at least a portion of the carbon monoxide present to carbon dioxide with generation of hydrogen, removing at least a portion of the carbon dioxide and other acid gas from the shifted gas stream; and reacting the hydrogen in the gas stream with carbon oxides present in the gas stream to generate methane and subjecting the methanated gas stream to cryogenic separation to yield at least a nitrogen-rich stream, a methane containing fuel gas and a hydrogen gas stream for recycle to the hydrogenation step.

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First Claim