Claims
- 1. A process for producing a nitrogen-enriched product in an adsorption bed having an inlet and an outlet, said bed comprising activated kinetic zeolite crushed to a particle size of about 10 to 40 mesh comprising the steps of:
- (a) introducing air at a pressure of about 20 to about 100 psig into said bed through said inlet for a period of about 4 to 15 seconds while withdrawing nitrogen enriched product from said bed through said outlet,
- (b) venting said bed through said inlet for a period of about 4 to about 15 seconds while blocking the flow of air to the bed and preventing nitrogen from reverse flowing to the bed through said outlet, and
- (c) repeating steps (a) and (b).
- 2. The process of claim 1, wherein the pressure of the feed air is in the range of about 30 psig to about 80 psig.
- 3. The process of claim 1, wherein the pressure of the feed air is about 60 psig.
- 4. The process of claim 3, wherein steps (a) and (b) are each carried out for about seven seconds.
- 5. The process of claim 1, wherein steps (a) and (b) are effected by means of a two position valve located in said inlet.
- 6. The process of claim 5, wherein steps (a) and (b) are carried out for about equal time periods.
- 7. The process of claim 6, wherein said time periods are each about ten seconds.
- 8. The process of claim 1, wherein the feed air passes through a water adsorbent material prior to entering said bed.
RELATED APPLICATION
This application is a continuation-in-part of application Ser. No. 07/498,078, filed Mar. 23, 1990, now abandoned.
US Referenced Citations (20)
Non-Patent Literature Citations (1)
Entry |
H. Shin et al., "Pressure Swing Adsorption: A Theoretical Study of Diffusion-Induced Separations", AIChE Journal, Apr. 1987, vol. 33, No. 4, pp. 654-662. |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
498078 |
Mar 1990 |
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