Thermochemically active iron titanium oxide materials

Patent metadata

Field	Value
Publication number	US-9868636-B1
Application number	US-201314097385-A
Country	US
Kind code	B1
Filing date	Dec 5, 2013
Priority date	Dec 6, 2012
Publication date	Jan 16, 2018
Grant date	Jan 16, 2018

Abstract

A thermal oxidation-reduction cycle is disclosed that uses iron titanium oxide as the reactive material. The cycle may be used for the thermal splitting of water and/or carbon dioxide to form hydrogen and/or carbon monoxide. The formed compounds may be used as syngas precursors to form fuels.

First claim

What is claimed is:

1. A method for generating a fuel or fuel precursor, comprising:
thermally reducing a mixture comprising ferric pseudobrookite and rutile not in the presence of a fuel to a reduced iron titanium oxide with an atomic ratio of iron to titanium of 1:1 and oxygen by heating the mixture with concentrated solar energy to react the ferric pseudobrookite and rutile;
reacting the reduced iron titanium oxide with a reactant to form a product and ferric pseudobrookite.

2. The method of claim 1 , wherein the reduced iron titanium oxide comprises ilmenite.

3. The method of claim 1 , wherein the reactant is H 2 O and the product is hydrogen.

4. The method of claim 1 , wherein the reactant is CO 2 and the product is carbon monoxide.

5. The method of claim 1 , wherein the reactant is a mixture of H 2 O and CO 2 and the product is a mixture of hydrogen and carbon monoxide.

6. The method of claim 1 , wherein the mixture is dispersed in an yttria stabilized zirconia matrix.

7. The method of claim 1 , wherein thermally reducing is at a temperature greater than or equal to 1280° C.

8. A concentrated solar energy thermal cycle method, comprising:
heating a mixture comprising ferric pseudobrookite and rutile not in the presence of a fuel to a reduction temperature by concentrated solar energy to cause a reduction reaction between the ferric pseudobrookite and rutile to produce reduced iron titanium oxide with a ratio of iron to titanium of 1:1; and
reducing a feedstock material by reacting the feedstock material with the reduced iron titanium oxide to form a product material and ferric pseudobrookite; and
repeating the heating and reducing steps.

9. The method of claim 8 , wherein the feedstock material comprises H 2 O.

10. The method of claim 8 , wherein the feedstock material comprises CO 2 .

11. The method of claim 8 , wherein the reactant is a mixture of H 2 O and CO 2 and the product is a mixture of hydrogen and carbon monoxide.

12. The method of claim 8 , wherein the mixture is dispersed in an yttria stabilized zirconia matrix.

Assignees

• Sandia Corp
• Nat Tech & Eng Solutions Sandia Llc

Inventors

• Coker Eric Nicholas
• Miller James E

Classifications

• C01B3/063 Primary

  Cyclic methods · CPC title

• C01B31/18

  Chemistry & Metallurgy · mapped topic

• C01B32/40

  Carbon monoxide · CPC title

• Y02E60/36

  Hydrogen production from non-carbon containing sources, e.g. by water electrolysis · CPC title

• C01G49/0018

  Mixed oxides or hydroxides, (C01G49/0009 takes precedence) · CPC title