Process for the recovery of perfluorinated compounds
AssigneeThe BOC Group, Inc.
InventorsSatish S. Tamhankar, Paul A. Sweeney, Neeraj Saxena
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Abstract
A process for recovering a given component from a first gas stream in which the given component is intermittently present by PSA or TSA using an adsorbent which more strongly adsorbs the given component by introducing into the first gas stream, prior to PSA or TSA treatment, a second gas stream that is enriched in the given component. The second gas stream may be introduced into the first gas stream only during periods when the concentration of given component in the first gas stream is below its maximum concentration or it may be continuously introduced into the first gas stream at a level which is greater than the maximum concentration of given component originally present in the first gas stream.
Claims13
A process for separating components of a feed gas comprised of a first component and a second component, wherein the concentration of said second component in said feed gas varies over time, by a cyclic adsorption process using an adsorbent which more strongly adsorbs said second component than said first component comprising the steps:
- (a) passing the feed gas through a chamber containing said adsorbent at a selected pressure and temperature, thereby adsorbing said second component and producing a gas stream depleted in said second component;
- (b) desorbing said second component from said adsorbent by reducing the pressure in said chamber or raising the temperature in said chamber or by reducing the pressure and raising the temperature in said chamber, thereby producing a gas stream enriched in said second component;
- and
- (c) modulating the concentration of second component in said feed gas by introducing supplemental second component into said feed gas.
Dependencies are inferred from the claim text.