Hydrogen liquefaction using a dense fluid expander and neon as a precoolant refrigerant
US4765813A · kind A · utility
13Cited by
13References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 7, 1987 |
| Grant date | Aug 23, 1988 |
| Priority date | — |
| Expiry date | Jan 7, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S62/931
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention is a process for the liquefaction of hydrogen which utilizes a dense fluid expander and neon as a precoolant refrigerant. In the process, a two phase mixture containing about 85-90% liquid of greater than 95% para-hydrogen is produced in a dense fluid expander. Most of the refrigeration for liquefaction is supplied by a neon refrigeration system, consisting of a centrifugal compressor, heat exchangers and one or more stages of neon expansion. As an option, further refrigeration may be supplied utilizing liquid nitrogen as another precoolant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.