Cryogenic recovery of hydrogen from ammonia synthesis gas
Abstract
Abstract THE RECOVERY OF AMMONIA AND HYDROGEN-ENRICHED GAS FROM AMMONIA SYNTHESIS PURGE GAS AT HIGH PRESSURE MAY BE ACHIEVED WITHOUT THE USE OF EXTERNAL REFRIGERATION. THE PURGE GAS IS COOLED TO NEARLY THE FREEZING POINT OF AMMONIA TO CONDENSE AND THUS SEPARATE AMMONIA FROM THE PURGE GAS. THE REFRIGERATION FOR CONDENSING AMMONIA IS PRODUCED BY WORK-EXPANDING THE PURGE GAS AFTER AMMONIA CONDENSATE HAS BEEN REMOVED THEREFROM. THEREAFTER, THE PURGE GAS IS FURTHER COOLED SO THAT GASEOUS IMPURITIES SUCH AS METHANE AND ARGON ARE CONDENSED AND SEPARATED TO LEAVE A HYDROGEN-ENRICHED GAS SUITABLE FOR RECYCLING TO THE AMMONIA SYNTHESIS. THE REFRIGERATION FOR CONDENSING THE GASEOUS IMPURITIES IS PRODUCED BY WORKEXPANDING THE PRODUCT HYDROGEN-ENRICHED GAS.
Inventors
- 👤 Stephen J Markbreiter
- 👤 Irving Weiss
Bibliographic Details
Claims Analysis
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| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
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