Compositions capable of operating under high carbon dioxide...

Details Compositions capable of operating under high carbon dioxide... Compositions capable of operating under high carbon dioxide...

C - Chemistry, Metallurgy

01

F

C01F 17/00 (2006.01) B01D 53/22 (2006.01) B01D 71/02 (2006.01) C01B 13/02 (2006.01) C01G 1/02 (2006.01) C01G 51/00 (2006.01) C04B 35/45 (2006.01)

Patent

CA 2171669

The present invention presents a new class of multicomponent metallic oxides which are particularly suited toward use in fabricating components used in solid-state oxygen separation devices. The compositions of the present invention are represented by the formula LnxA'x'A"x"ByB'y'B"y"O3-z, wherein Ln is an element selected from the f block lanthanides, A' is selected from Group 2, A" is selected from Groups 1, 2 and 3 and the f block lanthanides, and B,B',B" are independently selected from the d block transition metals, excluding titanium and chromium, wherein 0x<1, 0<x'<1, 0x"<1, 0<y<1.1, 0<y'<1.1, 0<y"<1.1, x+x'+x"=1.0, 1.1>y+y'+y">1.0 and z is a number which renders the compound charge neutral wherein such elements are represented according to the Periodic Table of the Elements adopted by IUPAC. These compositions provide superior resistance to degradation when employed in such devices under process conditions of high carbon dioxide and water partial pressures.

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