High frequency pressure swing adsorption

B - Operations – Transporting – 01 – D

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B01D 53/047 (2006.01)

Patent

CA 2276362

An apparatus and process for pressure swing adsorption separation of first and second components a feed gas mixture, to obtain a purified product gas of the less strongly adsorbed fraction of the feed gas mixture, is performed in s plurality of preferably an even number of adsorbent feeds (2, 4, 3, 5) with each adsorbent bed communicating at its product end (12, 13, 14, 15) directly to a variable volume expansion chamber (53, 57), and at its feed end by directional valves to a feed compressor and an exhaust vacuum pump. For high frequency operation of the pressure swing adsorptjon cycle, a high surface area layered support is used for the adsorbent. The compressor and vacuum pump pistons may be integrated with the cycle, reciprocating at twice they cycle frequency. Alternative configurations of the layered adsorbent beds are disclosed.

L'invention concerne la séparation par adsorption modulée en pression d'un mélange gazeux d'alimentation permettant d'obtenir un gaz purifié avec la fraction la moins fortement adsorbée dudit mélange gazeux. La séparation a lieu dans une pluralité, de préférence un nombre pair, de lits adsorbants (2, 4, 3, 5). Chaque lit adsorbant communique par son extrémité (12, 13, 14, 15) directement avec une chambre (53, 57) de détente à volume variable et communique au moyen de vannes directionnelles, par son extrémité d'alimentation, avec un compresseur d'alimentation et une pompe à vide d'évacuation. Pour l'obtention d'une haute fréquence du cycle d'adsorption modulée en pression, un support stratifé sert d'adsorbant. Le compresseur et les pistons de la pompe à vide peuvent être intégrés au cycle, leur mouvement alternatif se faisant à une fréquence correspondant à deux fois la fréquence du cycle. D'autres configurations des lits adsorbants stratifiés font aussi l'objet de cette invention.

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