公开(公告)号：US20230175773A1

公开(公告)日：2023-06-08

申请号：US17542682

申请日：2021-12-06

申请人： Air Products and Chemicals, Inc.

发明人： Paul Higginbotham ,  John H. Petrik ,  Christopher F. Harris

IPC分类号： F25J1/00 ,  F25J1/02

CPC分类号： F25J1/0052 ,  F25J1/001 ,  F25J1/0072 ,  F25J1/0015 ,  F25J1/0214 ,  F25J2270/16

摘要： Hydrogen is liquefied through a process utilizing refrigeration from hydrogen at one, two, or three different pressures as well as a nitrogen refrigeration cycle. One or more stages of catalyst are used to convert ortho-hydrogen to para-hydrogen as the hydrogen is cooled and liquefied. Subcooled liquid hydrogen feeds the final stage of ortho-hydrogen to para-hydrogen conversion to reduce or eliminate vaporization of the hydrogen during the exothermic ortho-hydrogen to para-hydrogen conversion.