METHOD FOR PROMOTING LIQUEFACTION OF HYDROGEN

摘要

PROBLEM TO BE SOLVED: To provide an efficient ortho-para conversion method. SOLUTION: A method for liquefying hydrogen has a step in which raw hydrogen including mixed ortho-hydrogen and para-hydrogen is supplied to a device having a dynamic quantum filter effect QF and hydrogen molecules from the device by association desorption or scattering are labeled with flying speeds corresponding to a kart wheel type rotating hydrogen molecule, a helicopter type rotating hydrogen molecule and an intermediate type rotating hydrogen molecule with respect to the desorption surface or scattering surface and has a device with which the former two of the labeled hydrogen molecules are allowed by kart wheel rotation to approach a surface having catalytic activity in an ortho-para conversion reaction by which effective conversion to para- hydrogen is achieved and they are reacted.