Granted Patent B2

US 12,258,272 · App. 17/401,071 · Granted Mar 25, 2025

Inventors: Kunho Lee (Dhahran, SA); Sai P. Katikaneni (Dhahran, SA); Aadesh Harale (Dhahran, SA); Bandar Solami (Dhahran, SA)

Assignee: Saudi Arabian Oil Company

C01B3/40B01J7/00B01J8/06B01J23/10B01J23/462B01J23/755B01J23/894B01J37/18B01J2208/06C01B2203/0238C01B2203/1058C01B2203/1064C01B2203/1082C01B2203/1241

Abstract

Claims (24)

1. A method of dry reforming methane, comprising reacting the methane with carbon dioxide via a reforming catalyst at a temperature of 700-900° C. and a pressure of 7 bar to 14 bar to generate synthesis gas comprising hydrogen and carbon monoxide, wherein the reforming catalyst comprises:

19.5 wt % of a nickel component;

0.5 wt % of a ruthenium component;

and

80 wt % of a cerium and gadolinium oxide component.

2. The method of claim 1 , wherein the cerium and gadolinium oxide component is Ce 0.9 Gd 0.1 O 2-x .

3. The method of claim 1 , wherein the catalyst is resistant to the formation of coke on the catalyst during use of the catalyst.

4. The method of claim 1 , comprising prior to the reacting, exposing the reforming catalyst to hydrogen and nitrogen at 700-800° C. for 3-6 hours.

5. The method of claim 1 , wherein the methane is converted to synthesis gas at a conversion rate of 70% or greater based on an initial concentration of methane.

6. The method of claim 1 , wherein the methane is in a methane-containing fluid stream, and wherein the methane-containing fluid stream further comprises propane and butane.

7. The method of claim 1 , wherein a volume ratio of the methane and carbon dioxide during the reacting is 1:1 to 1:3.

8. The method of claim 1 , wherein the methane and carbon dioxide are reacted via the reforming catalyst at a temperature of 700° C. and a pressure of 7 to 14 bar, and wherein the methane is converted to synthesis gas at a conversion rate of 71 to 80%.

9. The method of claim 8 , wherein a molar ratio of the hydrogen and carbon monoxide present in the synthesis gas is 1.8:1 to 1.9:1.

10. The method of claim 1 , wherein the methane and carbon dioxide are reacted via the reforming catalyst at a temperature of 750° C. and a pressure of 7 to 14 bar, and wherein the methane is converted to synthesis gas at a conversion rate of 79 to 85%.

11. The method of claim 10 , wherein a molar ratio of the hydrogen and carbon monoxide present in the synthesis gas is 1.5:1 to 1:2.

12. The method of claim 1 , wherein the methane and carbon dioxide are reacted via the reforming catalyst at a temperature of 800° C. and a pressure of 7 bar, and wherein the methane is converted to synthesis gas at a conversion rate of 70 to 90%.

13. The method of claim 12 , wherein a molar ratio of the hydrogen and carbon monoxide present in the synthesis gas is 1.5:1 to 1:2.

14. A method of dry reforming method, comprising:

providing methane and carbon dioxide to a dry reformer vessel, wherein a reforming catalyst comprising 19.5 wt % of a nickel component, 0.5 wt % of a ruthenium component, and 80 wt % of a cerium and gadolinium oxide component is disposed in the dry reformer vessel;

dry reforming the methane in the dry reformer vessel via the reforming catalyst at a temperature of 700-900° C. and a pressure of 7 bar to 14 bar to generate hydrogen and carbon monoxide; and

discharging the hydrogen and carbon monoxide from the dry reformer vessel.

15. The method of claim 14 , wherein the cerium and gadolinium oxide component is Ce 0.9 Gd 0.1 O 2-x .

16. The method of claim 14 , wherein the dry reforming comprises reacting the methane with the carbon dioxide.

17. The method of claim 14 , comprising providing heat to the dry reformer vessel for the dry reforming comprising reacting of the methane with the carbon dioxide, wherein the reacting of the methane with the carbon dioxide is endothermic.

Assignments (1)

Continuity (1)

References Cited (400)