Method And Apparatus For Separating A Component Mixture

Abstract: A method (100, 200, 300) for separating hydrogen from methane in a component mixture (101) containing light components is provided, the light components including hydrogen, methane and preferably at least one further component selected from methane, nitrogen, carbon monoxide and oxygen, wherein a pressure swing adsorption feed stream (102) is formed at a first pressure level, wherein the pressure swing adsorption feed stream (102) is subjected to a pressure swing adsorption step (10), wherein a high-pressure product (103) at the first pressure level and a low-pressure product (104) at a second pressure level below the first pressure level are withdrawn from the pressure swing adsorption step (10), wherein a membrane feed stream (105) is formed at a third pressure level at or above the second pressure level using the low-pressure product (104) or a part thereof, wherein the membrane feed stream is subjected to a membrane separation step (20), wherein a retentate (106) at the third pressure level and a permeate (107) at a fourth pressure level below the third pressure level are withdrawn from the membrane separation step (20), wherein the pressure swing adsorption feed stream (102) is formed using the permeate (107) or a part thereof, and wherein the pressure swing adsorption feed stream (102) and/or the membrane feed stream (105) is formed using the component mixture (101) or a part thereof. An apparatus is also part of the present invention.

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