Multi-bed rapid cycle kinetic PSA
AssigneeAir Products and Chemicals, Inc.
InventorsShubhra Jyoti Bhadra, Roger Dean Whitley, Timothy Christopher Golden, Dingjun Wu, Glenn Paul Wagner
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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 a kinetically 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.
Claims24
A multi-bed rapid cycle pressure swing adsorption (RCPSA) process for separating O2 from N2 and/or Ar, wherein the process utilizes at least five adsorption beds each comprising a kinetically 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., and wherein the RCPSA process comprises subjecting each of the adsorption beds to a rapid PSA cycle comprising the following steps carried out in the following sequence:
- i) feed
- ii) a first equalization depressurization
- iii) a second equalization depressurization
- iv) counter-current depressurization
- v) counter-current purge
- vi) a first equalization re-pressurization
- vii) a second equalization re-pressurization
- viii) product and/or feed re-pressurization
- wherein when an adsorbent bed is undergoing equalization depressurization step ii) it is connected with and provides a re-pressurization stream to one of the other adsorbent beds that is concurrently undergoing equalization re-pressurization step vii), and
- when an adsorbent bed is undergoing equalization depressurization step iii) it is connected with and provides a re-pressurization stream to another one of the other adsorbent beds that is concurrently undergoing equalization re-pressurization step vi).
Dependencies are inferred from the claim text.