Oxygen permeable mixed conductor membranes

Details Oxygen permeable mixed conductor membranes Oxygen permeable mixed conductor membranes

B - Operations, Transporting

01

D

B01D 71/02 (2006.01) B01D 53/22 (2006.01) B01D 53/32 (2006.01) B01J 8/00 (2006.01) B01J 19/00 (2006.01) B01J 19/24 (2006.01) C01B 3/38 (2006.01) C01B 13/02 (2006.01) C01G 51/00 (2006.01) C01G 53/00 (2006.01) C04B 35/01 (2006.01)

Patent

CA 2158607

The present invention relates to novel solid state mixed conductor membranes and their use for separating oxygen from oxygen-containing feeds at elevated temperatures. The membranes comprise a multicomponent metallic oxide of substantially cubic perovskite structure, stable in air over the temperature range of 25-950°C, having no connected through porosity wherein the membrane is of a composition represented by the formula [A1-xA'x][Co1-y-zByB'z]O3-.delta., where A - Ca, Sr, Ba, and mixtures thereof; A' - La, Y, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Th, U, and mixtures thereof; B = Fe, Mn, Cr, V, Ti, and mixtures thereof; B' - Cu, Ni, and mixtures thereof; ?0.0001 x ?0.1; ?0.002 y < 0.05; ?0.0005 z ?0.3; .delta. is determined by the valence of the metals.

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