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Awards Registry

Thin Layer Immobilized Liquid Membranes for Gas Separations
Profile last edited on: 5/5/15

Program
SBIR
Agency
NSF
Total Award Amount
$233,162
Award Phase
2
Principal Investigator
Ayre Z Gollan
Activity Indicator

Location Information

A/G Technology Corporation

101 Hampton Avenue
Needham, MA 02494
   (781) 449-5774
   N/A
   N/A
Multiple Locations:   
Congressional District:   04
County:   Norfolk

Phase I

Phase I year
1984
Phase I Amount
$39,972
The need for energy conservation to reduce U.S. dependence on potentially unstable foreign energy supplies is well documented. One major potential energy conservation measure is combustion with oxygen enriched air. Conventional methods for producing oxygen enriched air are uneconomical and hence are not practiced. Membrane processes, especially those based on immobilized liquid membranes, are characteristically simple and potentially highly economical to operate. Liquid membrane concepts proposed to date employ principally symmetric microporous polymeric structures to host the immobilized liquid barrier. Consequently, the thickness of the liquid membrane is the same as the support structure's thickness-typically 100 to 200 microns. Since in many cases gas transport through liquid membranes is diffusion-limited, reduced liquid layer thicknesses are highly desirable. The proposed program is concerned with the development of thin immobilized liquid membranes through the use of asymmetric polymeric microporous structures whereby the liquid layer is formed within the smaller pore region which is typically in the order of a few microns thick. Hollow fiber membrane supports will be used due to both their compact nature and preference over other geometries for gas separations. Oxygen enrichment evaluation '11, in Phase 1, center on membrane formation with passivc liquids. Reactive liquids (facilitated transport) will be explored in Phase 11.The potential commercial application as described by the awardee: Research will lead to the development of oxygen enrichment in air for improved combustion efficiency, oxidation processes, and inhalation therapy; and nitrogen enrichment in air for fuel blanketing and food blanketing for preservation.

Phase II

Phase II year
1985 (last award dollars: 1985)
Phase II Amount
$193,190
The use of semi-permeable membranes to separate components of solutions, or fluid mexture, has become an accepted technology during the past 20 years for many different applications including important processes such as water purification and kidney dialysis. The key to success with this separation method is a markedly different permeation rate for the components of interest. One way to achieve the desired membrane characteristics is to use a membrane barrior made up of a liquid supported by a porous solid. When the solid is in the shape of a hollow tube, there are system advantages over using separator sheets.