Enhanced pressure swing adsorption processing

Details Enhanced pressure swing adsorption processing Enhanced pressure swing adsorption processing

B - Operations, Transporting

01

D

183/25

B01D 53/04 (2006.01) B01D 53/047 (2006.01)

Patent

CA 1239595

- 34 - ENHANCED PRESSURE SWING ADSORPTION PROCESSING Abstract of the Invention A feed gas is passed to a pressure swing adsorption system, each bed of which undergoes a processing cycle that includes (1) pressurization (2) copurge at upper adsorption pressure, (3) countercurrent depressurization, including, in some embodiments, evacuation to a lower subatmospheric desorption pressure. By recycling effluent gas released upon copurge and countercurrent depressurization for use in the pressurization or the copurge step, the more readily adsorbable component of the feed gas is advantageously recovered at high purity and at high recovery levels. Enriched less readily adsorbable component is also recoverable as coproduct effluent at relatively high recovery levels. The process can be advantageously employed for the separation and recovery of product nitrogen from air.

503031

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