Temperature swing adsorption with regeneration by elevated press

Details Temperature swing adsorption with regeneration by elevated press Temperature swing adsorption with regeneration by elevated press

1998-04-14

1999-10-19

Spitzer, Robert

Gas separation: processes

Solid sorption

Inorganic gas or liquid particle sorbed

95123, 95139, B01D 5304, B01D 5326

Patent

active

059682345

ABSTRACT:
The present invention relates to a thermally regenerable adsorptive process for the purification of a feed air, wherein the feed air is contacted with a solid adsorbent to remove at least water and carbon dioxide, wherein, periodically, the solid adsorbent is thermally regenerated by contacting the solid adsorbent with a regeneration gas stream which is essentially free of at least water and carbon dioxide, wherein the regeneration gas is a nitrogen-enriched stream removed from an elevated pressure air separation unit fed with the purified feed air, characterized in that the removed nitrogen-enriched stream is compressed in a multiple staged compressor and that the regeneration gas is a portion of the nitrogen-enriched stream which is removed from an interstage of the multiple stage compressor and then contacted with the solid adsorbent. The process is particularly suited for use with a solid adsorbent selected from the group consisting of 13X zeolite, silica gel, A zeolite, Y zeolite, mordenite, chabazite and mixtures thereof. Finally, the process of the present invention can comprise recycling the regeneration gas after contact with the solid adsorbent to one of the stages of the multiple stage compressor, preferably, from the stage from which it was removed.

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