| 摘要 |
The present invention is a method for operating a rapid cycling pressure swing adsorption (RCPSA) having a cycle time, T, to separate a feed gas into a non-adsorbed gas and tail gas. The method includes the steps of passing the feed gas having a purity of F % at high pressure into a first end of a bed which selectively adsorbs the tail gas and passes the product gas out a second end of the bed for a time, F. The product gas has a purity, P %, and a rate of recovery of R %. Then the bed is cocurrently drpressurized for a time, t<SUB>CO</SUB>, followed by countercurrently depressurizing the bed for a time, t<SUB>CN</SUB>. The bed is then purged for a time, t<SUB>P</SUB>, wherein desorbate (tail gas) is released at the first end of the bed at a pressure greater than 30 psig, Subsequently the bed is repressurized for a duration, t<SUB>RP</SUB>. <?in-line-formulae description="In-line Formulae" end="lead"?>R>80%, P/F>=1.1 or R>=90%, 0<P/F<1.1. <?in-line-formulae description="In-line Formulae" end="tail"?>
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