Gas separation: processes – Selective diffusion of gases – Selective diffusion of gases through substantially solid...
Reexamination Certificate
2011-01-25
2011-01-25
Hopkins, Robert A (Department: 1776)
Gas separation: processes
Selective diffusion of gases
Selective diffusion of gases through substantially solid...
C095S096000, C095S138000
Reexamination Certificate
active
07875101
ABSTRACT:
A portable, non-cryogenic, oxygen generation system capable of delivering oxygen gas at purities greater than 98% and flow rates of 15 L/min or more is described. The system consists of two major components. The first component is a high efficiency membrane capable of separating argon and a portion of the nitrogen content from air, yielding an oxygen-enriched permeate flow. This is then fed to the second component, a pressure swing adsorption (PSA) unit utilizing a commercially available, but specifically formulated zeolite compound to remove the remainder of the nitrogen from the flow. The system is a unique gas separation system that can operate at ambient temperatures, for producing high purity oxygen for various applications (medical, refining, chemical production, enhanced combustion, fuel cells, etc . . . ) and represents a significant advance compared to current technologies.
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Toshinori Tsuru, et al., Production of High-Purity Oxygen by Continuous Membrane Column Combined with PSA Oxygen Generator, 1994 American Chemical Society.
Cornelius Christopher J.
Miller A. Keith
Staiger Chad L.
Vaughn Mark R.
Hopkins Robert A
Sandia Corporation
Watson Robert D.
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