Abstract: The invention relates to an invention for the liquefaction of hydrogen, comprising a supply circuit for supplying hydrogen to be cooled, a plurality of heat exchangers arranged in heat exchange with the supply circuit, a first pre-cooling device, a second pre-cooling device and a cooling system in heat exchange with the set of exchangers, to reduce the temperature of the hydrogen to a temperature below the critical temperature of hydrogen, the first pre-cooling device comprising a refrigerator having a closed refrigeration cycle for a first cycle gas comprising at least three components, a first centrifugal compressor, a cooling member, three phase separators configured to separate the two-phase fluid, the refrigerator having a refrigeration cycle of the first pre-cooling device comprising a first expansion member configured to expand the liquid produced by one of the phase separators and to return this fluid to a first centrifugal compressor via a passage through a heat exchanger of the set of exchangers.

Abstract: The invention relates to a facility for the liquefaction of hydrogen in a cryogenic liquefied-hydrogen store, via a downstream end of a circuit for hydrogen that is to be cooled, the cryogenic store being equipped with a withdrawing pipe configured to allow liquefied hydrogen to be supplied to at least one tank that is to be filled, particularly a mobile tank, the facility comprising a set of heat exchangers in a heat exchange relationship with the circuit for the hydrogen that is to be cooled, and a cooling device in a heat exchange relationship with the set of heat exchangers, said cooling device comprising a refrigerator with a cycle-gas refrigeration cycle, the facility comprising at least a first pipe for recovering boil-off gas, comprising a first end intended to be connected to a tank and a second end connected to the downstream end of the circuit for the hydrogen that is to be cooled, said first recovery pipe comprising at least a cryogenic compressor and a portion in a heat exchange relationship with

Abstract: In a hydrogen liquefaction process, a hydrogen-rich gas originating from an apparatus for separation by distillation and/or stripping and/or partial condensation, the gas exiting from the separation apparatus at a temperature of at most 103K containing at least 99.9 mol % of hydrogen and at a pressure between 20 and 30 bar, is sent to a hydrogen liquefier, without having heated the hydrogen-rich gas to a temperature above 0° C.

Abstract: Certain embodiments of the invention relate to a facility for refrigerating hydrogen to cryogenic temperatures, and in particular for liquefying hydrogen, comprising a circuit for hydrogen to be refrigerated comprising an upstream end to be connected to a hydrogen source, and a downstream end connected to a refrigerated hydrogen collection member, the refrigeration facility comprising a set of one or more heat exchangers in thermal exchange with the circuit of hydrogen to be refrigerated, the facility comprising a device for refrigerating by heat exchange with the set of one or more heat exchangers, the refrigerating device comprising a refrigerator with a refrigeration cycle of a cycle gas such as hydrogen, at least one portion of the hydrogen circuit, of the set of one or more exchangers and of the refrigerating device being housed in a vacuum-insulated cold box, the facility comprising in the cold box, at least one ejector the suction inlet of which is connected to the gas phase of a fluid capacity and the

Abstract: In a process for the combined production of a) a hydrogen-enriched gas and a carbon monoxide-enriched gas and/or b) a mixture of hydrogen and carbon monoxide by cryogenic distillation and scrubbing, a still liquor is extracted from a scrubbing column and sent to a stripping column, a still liquor is extracted from the stripping column and sent to a separating column for carbon monoxide and methane and a cooling fluid is used at a pressure greater than that of the head of the separating column for cooling at least one fluid extracted at an intermediate level from the scrubbing column.

Abstract: In a process for the combined production of a) a hydrogen-enriched gas and a carbon monoxide-enriched gas and/or b) a mixture of hydrogen and carbon monoxide by cryogenic distillation and scrubbing, a still liquor is extracted from a scrubbing column and sent to a stripping column, a still liquor is extracted from the stripping column and sent to a separating column for carbon monoxide and methane and a cooling fluid is used at a pressure greater than that of the head of the separating column for cooling at least one fluid extracted at an intermediate level from the scrubbing column.