Gas separation: processes – Solid sorption – Including reduction of pressure
Patent
1992-09-23
1993-11-30
Spitzer, Robert
Gas separation: processes
Solid sorption
Including reduction of pressure
95130, B01D 5304
Patent
active
052661024
ABSTRACT:
The invention is a process for selectively adsorbing nitrogen from a gas mixture which comprises contacting the gas mixture with an adsorbent that has a moderate nitrogen capacity and a high selectivity for nitrogen over the other components in the mixture. With respect to air separation, improved adsorbents have low O.sub.2 capacity with N.sub.2 capacity at roughly the same level as current adsorbents such as CaA. O.sub.2 VSA computer process simulations have shown the unexpected result that for materials with the same binary isothermal working selectivity, those with lower isothermal nitrogen working capacity are superior O.sub.2 VSA adsorbents, provided that they have a nitrogen working capacity of at least about 0.3 mmol/g.
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Gaffney Thomas R.
Kirner John F.
Kumar Ravi
Maliszewskyj Robin J.
Schmidt William P.
Air Products and Chemicals Inc.
Chase Geoffrey L.
Marsh William F.
Simmons James C.
Spitzer Robert
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