Two-feed pressure swing adsorption process

Details Two-feed pressure swing adsorption process Two-feed pressure swing adsorption process

1981-03-09

1982-06-08

Spitzer, Robert H.

Gas separation

Means within gas stream for conducting concentrate to collector

55 62, 55 68, 55 84, B01D 5304

Patent

active

043337449

ABSTRACT:
One portion comprising about 30-80% of a hydrogen-containing feed gas having a relatively high carbon dioxide content is preheated to remove a substantial portion of said carbon dioxide therefrom. The thus - preheated stream is passed to a pressure swing adsorption bed from which a purified hydrogen stream is withdrawn. Upon completion of this step, the unpretreated portion of the feed gas is passed to the feed end of the bed, with purified hydrogen continuing to be withdrawn from the bed. In cyclic pressure swing adsorption operations employing such a two-feed process, the recovery of purified hydrogen is enhanced as compared with operations in which none of the feed gas is pretreated for carbon dioxide removal or in which all of the feed gas is so treated for removal of carbon dioxide therefrom.

REFERENCES:
patent: 3343916 (1967-09-01), Cahn et al.
patent: 3378992 (1968-04-01), Pierce et al.
patent: 3430418 (1969-03-01), Wagner
patent: 3986849 (1976-10-01), Fuderer et al.

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