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US 11,285,428 B2Granted
Process for separation of hydrogen and oxygen
AssigneeSabic Global Technologies B.V.
InventorsAbdulaziz M. Al-Jodai, Nasser Ali Aldalaan, Mubarik Ali Bashir
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Abstract
Embodiments of the invention are directed to methods, processes, and systems for safely and reliably purifying hydrogen from a gas mixture containing hydrogen and oxygen.
Claims17
A process for separating hydrogen and oxygen from a gas mixture produced from photocatalytic splitting of water comprising:
- (a) separating hydrogen and oxygen at about atmospheric pressure from a feed source by
- (i) passing the feed source through a vacuum swing adsorption separation unit containing an adsorption medium comprising a carbon molecular sieve that selectively adsorbs hydrogen from the feed source producing an enriched oxygen product gas and an adsorption medium enriched in hydrogen;
- and
- (ii) desorbing the adsorbed hydrogen by exposing the hydrogen enriched adsorption medium to a vacuum forming an hydrogen enriched purge gas and a regenerated adsorption medium, wherein the desorption process is performed at 15 to 60° C. and a pressure of about 0.1 mbar to 0.5 bar;
- and
- (b) collecting, storing, or utilizing the product gas and purge gas.
3 more elements
Dependencies are inferred from the claim text.