Multi-bed rapid cycle kinetic psa

Abstract

Disclosed herein are multi-bed rapid cycle pressure swing adsorption (RCPSA) processes for separating O2 from N2 and / or Ar, wherein the process utilizes at least five adsorption beds each comprising akinetically selective adsorbent for O2 having an O2 adsorption rate (1 / s) of at least 0.20 as determined by linear driving force model at 1 atma and 86 F.

Description

technical field [0001] The present invention relates to the use from N 2 and / or separate O from Ar 2 A multi-bed rapid cycle pressure swing adsorption (PSA) process. Background technique [0002] The PSA method has long been used to separate air components. Recently, there has been considerable interest in the intensification of separation processes. In cyclic processes such as PSA and TSA, reducing cycle time is the primary means of achieving more production from a given amount of material. However, as the cycle time decreases, the recycle process usually faces the problems of reduced working capacity per cycle of the component of interest, lower product recovery and increased pressure drop. [0003] Recent developments in PSA methods involve the use of adsorbents with faster adsorption kinetics, such as relatively fast kinetics-selective laminated adsorbent structures, to increase productivity. However, this increase in productivity usually comes at the expense of red...

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Problems solved by technology

Alternatively, slower, more selective kinetic adsorbents can be used to obtain high purity products with good product recovery, however this also comes at the expense of reducing the overall productivity of the process

[0008] Thus, it is evident from the prior art that there is a trade-off between product recovery and process productivity; process improvements that increase product recovery are often detrimental to process productivity and vice versa

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