Recovery of nitrogen, hydrogen and carbon dioxide from hydrocarb

Details Recovery of nitrogen, hydrogen and carbon dioxide from hydrocarb Recovery of nitrogen, hydrogen and carbon dioxide from hydrocarb

1987-10-16

1989-03-21

Spitzer, Robert

Gas separation

Means within gas stream for conducting concentrate to collector

55 58, 55 62, 55 70, 55 74, 55 75, 423359, B01D 5304

Patent

active

048139807

ABSTRACT:
Multi-column pressure swing adsorption process for simultaneous production of ammonia synthesis gas and carbon dioxide from a reformer off gas having hydrogen, nitrogen and carbon dioxide as major components accompanied by minor quantities of methane, carbon monoxide and argon as impurities. The PSA system features two groups of adsorbent columns in which CO.sub.2 is adsorbed in adsorbers of the first group, the essentially CO.sub.2 -freed effluent being charged to an adsorber of the second group for removal of minor impurities while discharging an effluent gas having an H.sub.2 /N.sub.2 content stoichiometric for NH.sub.3 synthesis. The CO.sub.2 recovered from the first group of adsorbers is available at a high purity for reaction with the ammonia product for production of urea.

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