Mixed metal iron oxides and uses thereof

Abstract

This invention is directed to novel mixed transition metal iron (II/III) catalysts for the extraction of oxygen from CO2 and the selective reaction with organic compounds.

1 - 9 . (canceled) 
     
     
         10 . A method for converting CO 2  and carbon to carbon monoxide which comprises contacting the mixed transition metal iron (II/III) catalyst wherein the mixed transition metal iron (II/III) catalyst is an iron (II/III) oxide and a second metal oxide selected from the group consisting of Ag, Bi, Co, Cu, La, Mn, and Zn oxides with an appropriate CO 2  feed stream under appropriate temperature and pressure conditions. 
     
     
         11 . The method of  claim 10 , wherein the carbon, the mixed transition metal iron (II/III) catalyst, and the appropriate CO 2  feed stream are reacted together at the same time. 
     
     
         12 . The method of  claim 11 , wherein the carbon, the mixed transition metal iron (II/III) catalyst, and the appropriate CO 2  feed stream are reacted together in a fluidized bed. 
     
     
         13 - 24 . (canceled) 
     
     
         25 . The method of  claim 10 , wherein the mixed transition metal iron (II/III) catalyst comprises Fe 2 O 3 /Fe 3 O 4 . 
     
     
         26 . The method of  claim 10 , wherein the second metal oxide in the mixed transition metal iron (II/III) catalyst is Co, Cu, La, Mn, or Zn oxide. 
     
     
         27 . The method of  claim 10 , wherein the mixed transition metal iron (II/III) catalyst further comprises an alkali or alkaline-earth element promoter. 
     
     
         28 . The method of  claim 10 , wherein the mixed transition metal iron (II/III) catalyst further comprises an alkali element promoter. 
     
     
         29 . The method of  claim 10 , wherein the mixed transition metal iron (II/III) catalyst further comprises an alkaline-earth element promoter. 
     
     
         30 . The method of  claim 10 , wherein the promoter is Na, K, Cs, Mg, Ca or Sr. 
     
     
         31 . The method of  claim 30 , wherein the promoter has a formula A 2 O, A 2 CO 3 , or A(OH) (wherein A is Na, K, or Cs); a formula BO, BCO 3 , or B(OH) 2  (wherein B is Mg, Ca, or Sr); or a mixture thereof. 
     
     
         32 . The method of  claim 27 , wherein the promoter is Na, K, Cs, Mg, Ca, Sr or a mixture thereof. 
     
     
         33 . The method of  claim 10 , wherein the mixed transition metal iron (II/III) catalyst further comprises a support. 
     
     
         34 . The method of  claim 33 , wherein the support is Al 2 O 3 , SiO 2 , TiO 2 , ZrO 2  or a mixture thereof. 
     
     
         35 . The method of  claim 34 , wherein the support is Al 2 O 3 . 
     
     
         36 . The method of  claim 10 , wherein the carbon, the mixed transition metal iron (II/III) catalyst, and the appropriate CO 2  feed stream are reacted together in a transport reactor. 
     
     
         37 . The method of  claim 10 , wherein the carbon, the mixed transition metal iron (II/III) catalyst, and the appropriate CO 2  feed stream are reacted together in a riser reactor.