US Government As Represented by the Secretary of the Army

Zachary W Dunbar

Ivan C Lee

Casey P O'Brien

A permeation cell device includes a body component, a wire mesh support structure positioned in the body component, a membrane over the wire mesh support structure, a pair of compressible gaskets sandwiching the membrane, and a flange compressing the membrane. A spectroscopic device contains the permeation cell device. At least one mechanism simultaneously performs an infrared-reflection absorption spectroscopic analysis of a surface of the membrane as a fluid permeates on the membrane and measures a trans-membrane fluid permeation rate across the membrane. The wire mesh support structure may be configured to provide mechanical support to the non-opaque membrane at a pressure of at least 1 atm. The permeation cell device and the spectroscopic device may collectively create a pair of separate isolated compartments. The body component may include a material that is non-permeable to the fluid.

Spectroscopic membrane permeation cell for simultaneous measurements of gas permeation rates and infrared reflection absorption spectroscopic analysis of membrane surfaces

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Annandale, VA, United States of America

Zachary W Dunbar