Gas separation: processes – Selective diffusion of gases – Selective diffusion of gases through substantially solid...
Reexamination Certificate
2007-10-09
2007-10-09
Greene, Jason M. (Department: 1724)
Gas separation: processes
Selective diffusion of gases
Selective diffusion of gases through substantially solid...
C096S004000, C096S010000, C096S011000, C205S763000, C205S764000, C205S765000, C204S295000
Reexamination Certificate
active
11017041
ABSTRACT:
A method of separating oxygen from an oxygen containing feed and reacting the oxygen with a reactive substance and an oxygen ion transport membrane element utilized for such purposes. The oxygen ion transport membrane element has a self-supporting dense layer and a surface porous feature in contact with and supported by the dense layer. The porous surface feature may be a layer, a layer having discontinuities or a series of repeating geometrical forms. The dense layer and the porous surface feature are capable of conducting oxygen ions and electrons. The porous surface feature at least in part forms the anode side of the oxygen ion transport membrane element at which the reactive substance reacts with the separated oxygen and has a thickness less than that of the dense layer and a greater surface area than that of a surface of the dense layer adjoining the porous layer. Pores within the porous surface feature have a pore aspect ratio of pore size to pore length of between about 0.1 and about 5.
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Apte Prasad S.
Schwartz Joseph M.
White James E.
Greene Jason M.
Praxair Technology Inc.
Rosenblum David M.
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