L'air Liquide,societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude

Céline Carriere

Christian Monereau

Elise Renou

Itziar Urrutia

Pressure shift adsorption (PSA) process for producing a gas stream enriched with compound X from a feed gas stream, using N adsorbers with N&#x2267;5, each adsorber being subjected to a pressure cycle having a phase time corresponding to the duration of the pressure cycle divided by the number of adsorbers, and a series of active steps, characterized in that each adsorber n follows the pressure cycle with an offset of one phase time with respect to the pressure cycle of the adsorber n&#x2212;1 with n&#x2266;N, and during each phase time, only one active step or a part of active step takes place.

PSA process with one active step per phase time

TSA method for purification by means of adsorption of a synthetic gas including hydrogen, CO and/or methane, implementing at least one adsorber having at least one adsorbent and subjected to a pressure cycle comprising at least an adsorption step, a step of producing a flow enriched with a main component and a regeneration step, characterized in that the regeneration step includes:

Method of purification by means of adsorption with regeneration using a gas containing an undesired component in the purified gas

Process for producing hydrogen from a gas mixture comprising hydrogen, CO2, CO, CH4 and water, employing a CO2 PSA unit, a cryogenic unit and an H2 PSA unit, in which process: a) said gas mixture is introduced into the CO2 PSA unit, producing a CO2-enriched fraction and CO2-depleted fraction; b) CO2-enriched fraction is introduced into the cryogenic unit, producing a CO2-enriched fraction and an H2-enriched fraction; c) the H2-enriched fraction is recycled upstream of the H2 PSA unit; and d) the CO2-depleted fraction coming from step b) is introduced into the H2 PSA unit, producing a hydrogen-enriched stream and a waste gas.

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Villemomble, France

Céline Carriere