Recovery of hydrogen and ammonia from purge gas

Details Recovery of hydrogen and ammonia from purge gas Recovery of hydrogen and ammonia from purge gas

F - Mech Eng,Light,Heat,Weapons

25

J

162/105

F25J 3/00 (2006.01) B01D 53/04 (2006.01) C01C 1/04 (2006.01)

Patent

CA 1105369

- 1 - TITLE: RECOVERY OF HYDROGEN AND AMMONIA FROM PURGE GAS ABSTRACT Ammonia and hydrogen values are recovered from the purge gas from an ammonia synthesis recycle stream by removing the ammonia from the purge gas by adsorption in an ammonia adsorber, thereafter separating the hydrogen by cryogenic partial condensation, the refrigeration for which is provided by expanding and evaporating the condensate, and recovering the ammonia from the adsorber by heating a part of the hydrogen and using it as the regenerating gas for the adsorber, the heat for heating the hydrogen preferably being provided by combusting a part of the evaporated condensate recovered from the cryogenic partial condensation.

336035

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