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Abstract

In a process for separating a mixture containing hydrogen and carbon dioxide, the following steps are present: a) cooling of the mixture in a heat exchanger by sending the mixture to the heat exchanger, resulting in the partial condensation of the mixture into a liquid phase enriched in carbon dioxide and a gas phase depleted in carbon dioxide, a gaseous fluid which is heated in the heat exchanger by indirect heat exchange, b) separating the liquid phase from the gas phase in a separator vessel, c) heating of the gas phase originating from at least one of the separator vessels in the heat exchanger, d) sending of the at least one heated part from step c) to a membrane separation unit, generating a residue depleted in hydrogen and carbon dioxide and e) expansion of the at least one residue in a turbine producing an expanded fluid, f) the expanded fluid constituting the gaseous fluid of step a) which is heated in the heat exchanger by indirect heat exchange.

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First Claim