Oxygen and nitrogen enriched atmospheres in aircraft

B - Operations – Transporting – 64 – D

Patent

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Details

B64D 13/02 (2006.01) B01D 53/22 (2006.01) C08L 81/06 (2006.01)

Patent

CA 2437422

In the present method of supplying oxygen rich air to the passengers and crew on board a passenger aircraft by means of a highly permeable oxygen enrichment unit, the fibre tubes of the hollow fibre membranes used to separate normal air into oxygen rich and nitrogen rich fractions in the oxygen enrichment unit are subjected to a modification technique before the tubes are coated with a selective polymer. Also, in the present method of supplying inert nitrogen rich air to the fuel tanks or other areas of an aircraft by means of a highly selective nitrogen enrichment unit, wherein the fibre tubes of the hollow fibre membranes used to separate normal air into nitrogen rich and oxygen rich fractions in the nitrogen enrichment unit are also subjected to a modification technique before the tubes are coated with a selective polymer, and wherein the coating on the hollow fibre membranes is then preferably subjected to a plasma treatment technique.

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