Cyclic catalytic upgrading of chemical species using metal oxide materials
Processes are disclosure which comprise alternately contacting an oxygen-carrying catalyst with a reducing substance, or a lower partial pressure of an oxidizing gas, and then with the oxidizing gas or a higher partial pressure of the oxidizing gas, whereby the catalyst is alternately reduced and then regenerated to an oxygenated state. In certain embodiments, the oxygen-carrying catalyst comprises at least one metal oxide-containing material containing a composition having the following formulas: (a) Ce.sub.xB.sub.yB'.sub.zB''O.sub..delta., wherein B=Ba, Sr, Ca, or Zr; B'=Mn, Co, and/or Fe; B''=Cu; 0.01<x<0.99; 0<y<0.6; 0<z<0.5; (b) Ce.sub.1-x-yNi.sub.xB.sub.yO.sub.2-*, wherein B=Zr, Ba, Ca, La, or K; 0.02<x<0.1; 0<y<0.1; and 0.02<*<0.15; and 1<.delta.<2.2 and (c) coal ash either as a catalyst material itself or as a support for said unary or binary metal oxides.
- Research Organization:
- Eltron Research & Development, Inc. (Boulder, CO)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FG02-05ER84200; FG02-04ER83936
- Assignee:
- Eltron Research & Development, Inc. (Boulder, CO)
- Patent Number(s):
- 8,435,920
- Application Number:
- 12/901,598
- OSTI ID:
- 1084231
- Country of Publication:
- United States
- Language:
- English
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