Perovskite Oxygen Carriers and Methods for Making and Using Perovskite Oxygen Carriers
AssigneeUnited States Department of Energy
InventorsJonathan Lekse, Christopher Marin, Eric Popczun, Sittichai Natesakhawat
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Abstract
A perovskite oxygen carrier having the formula Sr1-xCaxFe1-yNiyO3, where 0.05<x<0.30 and 0.001<y<0.125 and a method of using the perovskite carrier to carry oxygen. A mesoporous perovskite oxygen carrier having the formula Sr1-xCaxFeO3, where 0.01<x<0.40 and methods for making and using the mesoporous perovskite oxygen carrier.
Claims10
A perovskite oxygen carrier comprising the formula SrFeO3, wherein the oxygen carrier comprises an A-site and a B-Site, and wherein the B-site is doped with Ni.
A perovskite oxygen carrier comprising the formula Sr1-xCaxFe1-yNiyO3, where 0.05<x<0.30 and 0.001<y<0.125.
A method for carrying oxygen using a perovskite oxygen carrier, the method comprising:
- providing a reduced oxygen carrier to a reaction environment;
- contacting the reduced oxygen carrier with an oxygen containing gaseous stream for a predetermined time at a first temperature and a first oxygen partial pressure, wherein the reduced oxygen carrier adsorbs oxygen from the gaseous stream during this step, giving an oxygen carrier;
- and
- heating the oxygen carrier to a second temperature at a second oxygen partial pressure, causing oxygen adsorbed onto the oxygen carrier in the contacting step to be released from the oxygen carrier, reforming the reduced oxygen carrier, wherein the oxygen carrier comprises the formula Sr1-xCaxFe1-yNiyO3, where 0.05<x<0.30 and 0.001<y<0.125.
Dependencies are inferred from the claim text.