Processing

Please wait...

Settings

Settings

Goto Application

1. WO2020139094 - CATALYSTS FOR CONVERTING CARBON DIOXIDE AND METHANE TO SYNTHESIS GAS

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

CLAIMS

The invention is claimed as follows:

1. A catalyst for converting methane and carbon dioxide to synthesis gas, the catalyst comprising:

an alumina-supported copper-nickel alloy composition having a formula NixCuy, wherein x is an atomic percentage nickel content and y is an atomic percentage copper content, and wherein a ratio of x to y is about 3 : 1 to about 10: 1.

2. The catalyst of claim 1, wherein the ratio of x to y is about 5: 1 to about 9: 1.

3. The catalyst of claim 1 , wherein the ratio of x to y is about 8 : 1 to about 10: 1.

4. The catalyst of claim 1, wherein the ratio of x to y is about 8: 1.

5. The catalyst of claim 1, wherein the catalyst comprises about 70% to about 98% by weight of the alumina in the catalyst.

6. The catalyst of claim 1, wherein the catalyst is prepared by a process comprising incipient wetness impregnation.

7. The catalyst of claim 1 , wherein the catalyst retains at least 99% of its optimized activity after at least 10 hours’ catalysis reaction.

8. The catalyst of claim 7, wherein the activity is either CTL conversion or CO2 conversion.

9. The catalyst of claim 1, wherein the catalyst retains about 100% of its initial activity after at least 10 hours’ catalysis reaction.

10. The catalyst of claim 9, wherein the activity is either CTL conversion or CO2 conversion.

11. The catalyst of claim 1, wherein the catalyst retains at least 70% of its initial activity after at least 70 hours’ catalysis reaction.

12. The catalyst of claim 11, wherein the activity is either CTri conversion or CC conversion.

13. The catalyst of claim 1 , wherein an XRD pattern of the catalyst has peaks at 20= 44.4° and 51.7°.

14. A method for converting carbon dioxide and methane to synthesis gas, the method comprising:

processing a feedstock comprising methane and carbon dioxide stream in presence of a catalyst, whereby the synthesis gas including carbon monoxide and hydrogen is produced, wherein the catalyst comprises an alumina-supported copper-nickel alloy composition having a formula NixCuy, wherein x is an atomic percentage nickel content and y is an atomic percentage copper content, and wherein a ratio of x to y is about 3 : 1 to about 10: 1.

15. The method of claim 14, wherein the method includes dry reforming of the methane.

16. The method of claim 14, wherein the catalyst comprises about 70% to about 98% by weight of the alumina in the catalyst.

17. The method of claim 14, wherein the catalyst is prepared by a process comprising incipient wetness impregnation.

18. The method of claim 14, wherein the ratio of x to y is selected by using an ab-initio density functional theory calculation for an activation barrier of processing the methane.

19. The method of claim 14, wherein the ratio of x to y is selected by using an ab-initio density functional theory calculation for each elementary reaction of dry reforming of the methane.

20. The method of claim 14, wherein a conversion percentage of methane is in the range of 1-80%.

21. The method of claim 14, wherein a conversion percentage of CO2 is in the range of 1-90%.

22. The method of claim 14, wherein a H2/CO ratio of the synthesis gas obtained is in the range of 1-1.2.

23. The method of claim 14, wherein the catalyst retains about 100% of its optimized activity after at least 10 hours’ catalysis reaction.

24. The method of claim 23, wherein the activity is either CTU conversion or CO2 conversion.

25. The method of claim 14, wherein the catalyst retains at least about 70% of its initial activity after at least 70 hours’ catalysis reaction.

26. The method of claim 25, wherein the activity is either CTft conversion or CO2 conversion.