Slush system by freeze-thaw process

摘要

This invention relates to a continuous process for the preparation of slush hydrogen by the freeze-thaw technique. The process comprises substantially continuously injecting liquid hydrogen (12) at or near its triple point temperature into a slush hydrogen generator (2); forming solid hydrogen by removing hydrogen vapor (14) from the slush hydrogen generator; alternately adjusting the pressure in the slush hydrogen generator to a pressure below the triple point of hydrogen and then to a pressure slightly above the pressure at the triple point thereby effecting formation and dispersion of solids in said slush; concentrating the crystalline solid particles int he slush to a level of at least 30%, and preferably from 45 to 60%, by weight; and substantially continuously removing the slush hydrogen (10) from said slush hydrogen generator (2) at a rate such that a substantially constant level of slush is maintained in said slush hydrogen generator.