Nickel-iron catalyst and methods of making and using same
A catalyst includes a derivative of an iron-containing clay which includes at least one member selected from the group consisting of a nickel-iron bimetallic structure according to XRD and a nickel-iron bimetallic oxide structure according to XRD. The catalyst can be used in various reactions, such as carbon dioxide methanation and dry reforming of methane and carbon dioxide to produce syngas.
1. A method, comprising:
using a catalyst to convert methane and carbon dioxide to hydrogen and carbon monoxide, under temperature of 400° C. to 800° C.
wherein the catalyst comprises a derivative of an iron-containing clay which comprises at least one member selected from the group consisting of a nickel-iron bimetallic structure containing Fe 0.5 Ni 0.49 according to X-ray diffraction and a nickel-iron bimetallic oxide structure containing Fe 1.7 Ni 1.4 O 4 according to X-ray diffraction; and
wherein the catalyst has a surface area of at least 40 m 2 g −1 .
2. The method of claim 1 , wherein the catalyst has a carbon dioxide conversion of at least 80% at a temperature of 800° C., a pressure of 2 bar, and a total feed gas hourly space velocity of 1477 h −1 .
3. The method of claim 1 , wherein the catalyst has a carbon dioxide conversion of at least 85% at a temperature of 800° C., a pressure of 2 bar, and a total feed gas hourly space velocity of 1477 h −1 .
4. The method of claim 1 , wherein the catalyst has a methane conversion of at least 80% at a temperature of 800° C., a pressure of 2 bar, and a total feed gas hourly space velocity of 1477 h −1 .
5. The method of claim 1 , wherein the catalyst has a methane conversion of at least 85% at a temperature of 800° C., a pressure of 2 bar, and a total feed gas hourly space velocity of 1477 h −1 .
6. The method of claim 1 , wherein the catalyst has a yield of hydrogen gas of at least 50% at a temperature of 800° C., a pressure of 2 bar, and a total feed gas hourly space velocity of 1477 h −1 .
7. The method of claim 1 , wherein the catalyst has a yield of hydrogen gas of at least 60% at a temperature of 800° C., a pressure of 2 bar, and a total feed gas hourly space velocity of 1477 h −1 .
8. The method of claim 1 , wherein the catalyst comprises the nickel-iron bimetallic structure according to X-ray diffraction.
9. The method of claim 1 , wherein the catalyst comprises the nickel-iron bimetallic oxide structure according to X-ray diffraction.
10. The method of claim 1 , wherein the catalyst comprises a nickel-iron bimetallic structure according to X-ray diffraction and a nickel-iron bimetallic oxide structure according to X-ray diffraction.
11. The method of claim 1 , wherein the catalyst comprises at least 10 weight percent nickel oxide according to X-ray fluorescence.
12. The method of claim 1 , wherein, according to X-ray fluorescence, the catalyst comprises at least one oxide of a member selected from the group consisting of iron, silicon, aluminum and calcium.
13. The method of claim 1 , wherein the iron-containing clay comprises at least one member selected from the group consisting of nontronite, illite and actinolite.
14. The method of claim 1 , wherein the catalyst has a surface area of at most 250 m 2 g −1 .