PROCESS AND APPARATUS FOR LIQUEFYING HYDROGEN

摘要

PROBLEM TO BE SOLVED: To provide a process for liquefying hydrogen gas.

SOLUTION: A process for liquefying hydrogen includes the steps of: pre-cooling hydrogen feed gas by indirect heat exchange with pressurized liquefied natural gas ("LNG") to produce pre-cooled hydrogen feed gas and pressurized natural gas; further cooling at least a portion of the pre-cooled hydrogen feed gas by indirect heat exchange with at least one refrigerant to produce condensable hydrogen gas; and expanding at least a portion of the condensable hydrogen gas to produce at least partially condensed hydrogen.

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