Hydrogen liquefaction method and liquefier
US8042357B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 2009 |
| Grant date | Oct 25, 2011 |
| Priority date | — |
| Expiry date | May 12, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25J2270/06
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention provides a method of liquefying a hydrogen feed stream and a liquefier for carrying out such a method in which ortho-species of hydrogen contained in a hydrogen feed stream is converted to the para-species in higher and lower temperature catalytic converters. An adsorption unit, located between the higher and lower temperature catalytic converters, adsorbs a portion of the ortho content of the feed stream. The adsorbed portion is desorbed during regeneration of an adsorbent bed of the adsorption unit and is recirculated back for treatment in the higher temperature catalytic converter to reduce the degree to which the ortho-species are converted to the para-species in the lower temperature catalytic converter and at lower temperatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.