Method And Plant For Provision Of A Hydrogen Fraction

Abstract: The invention relates to a method for obtaining a hydrogen fraction from a mixture of hydrogen, methane and higher hydrocarbons. First, the mixture undergoes a first condensation at -95 °C to -100 °C, in order to obtain a condensed and a non-condensed portion. A second condensation step is carried out at -130 °C to -150 °C. Then, a pressure swing adsorption is carried out to extract pure hydrogen gas and to leave behind a residual gas. The second condensation step uses the residual gas and a portion of the condensed gas from the second condensation. The formation of the second condensation step involves compressing the residual gas and expanding, evaporating and condensing the fed-back condensed portion. In addition, there is a heat exchange between the second condensed feed and the fed-back amount. The invention also relates to a corresponding plant.

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