Separation of gas mixtures including hydrogen
A process is described of separating a gas mixture comprising at least three components into three different fractions by pressure swing adsorption, comprising repeatedly performing a cycle including: passing said gas mixture sequentially through first and second adsorptive regions on each of which a second component of the mixture is more strongly adsorbed than a first component, but less strongly adsorbed than a third component; withdrawing a first fraction enriched in said first component from the downstream end of the second adsorptive region; stopping admission of the said gas mixture to the first adsorptive region; withdrawing a second fraction enriched in the second component from the downstream end of the first adsorptive region and from the upstream end of the second adsorptive region into a common pipeline; and withdrawing a third fraction enriched in the third component from the upstream end of the first adsorptive region.
- Assignee:
- BOC Group plc, Surrey (United Kingdom)
- Patent Number(s):
- US 5234472; A
- Application Number:
- PPN: US 7-849261
- OSTI ID:
- 6056826
- Resource Relation:
- Patent File Date: 11 Mar 1992
- Country of Publication:
- United States
- Language:
- English
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