Process for converting of methane steam reforming syngas with co2

Patent metadata

Field	Value
Publication number	US-2017015549-A1
Application number	US-201515116289-A
Country	US
Kind code	A1
Filing date	Mar 31, 2015
Priority date	Apr 3, 2014
Publication date	Jan 19, 2017
Grant date	—

Abstract

In an embodiment, a process of making C 2+ hydrocarbons comprises contacting a feed comprising a methane steam reforming gas and an additional carbon dioxide with a manganese oxide-copper oxide catalyst to produce a product syngas in a contacting zone under isothermal conditions at a temperature of 620 to 650° C.; and converting the product syngas to C 2+ hydrocarbons in the presence of a Fischer-Tropsch catalyst; wherein the methane steam reforming gas has an initial H 2 :CO volume ratio greater than 3; wherein the product syngas has a H 2 :CO volume ratio of 1.5 to 3; and wherein the contacting further comprises removing water.

First claim

1 . A process of making C 2+ hydrocarbons comprising:
contacting a feed comprising a methane steam reforming gas and an additional carbon dioxide with a manganese oxide-copper oxide catalyst to produce a product syngas in a contacting zone under isothermal conditions at a temperature of 620 to 650° C.; and
converting the product syngas to C 2+ hydrocarbons in the presence of a Fischer-Tropsch catalyst;
wherein the methane steam reforming gas has an initial H 2 :CO volume ratio greater than 3; wherein the product syngas has a H 2 :CO volume ratio of 1.5 to 3; and wherein the contacting further comprises removing water.

2 . The process of claim 1 , wherein the water is removed such that less than or equal to 0.05 vol % water is present in the contacting zone.

3 . The process of claim 1 , wherein the initial H 2 :CO volume ratio is greater than 5.

4 . The process of claim 1 , further comprising converting a methane feed into the methane steam reforming gas in the presence of a nickel-based catalyst.

5 . The process of claim 1 , further comprising adding the methane steam reforming gas and the additional carbon dioxide in a volume ratio of 2 to 4.

6 . The process of claim 1 , wherein a volume ratio of H 2 to total CO 2 is 1 to 2, wherein the total CO 2 is equal to a CO 2 present in the methane steam reforming gas plus the CO 2 in the additional CO 2 .

7 . The process of claim 1 , wherein the contacting occurs at one or both of a pressure of 0.1 to 6 MPa, and a contact time between the feed and the manganese oxide-copper oxide catalyst of 0.5 to 6 seconds.

8 . The process of claim 1 , wherein the manganese oxide-copper oxide catalyst comprises 40 to 95 wt % of a support based on total weight of the metal oxide and support.

9 . The process of any of claim 8 , wherein the manganese oxide-copper oxide catalyst comprises one or both of 1 to 50 wt % of manganese and 0.1 to 95 wt % of copper; based on the total weight of the manganese oxide-copper oxide catalyst and support.

10 . The process of claim 1 , wherein the product syngas has an H 2 :CO volume ratio of 2 to 2.5.

11 . The process of claim 1 , wherein the C 2+ hydrocarbons are C 2-6 hydrocarbons.

12 . The process of claim 1 , wherein the Fischer-Tropsch catalyst comprises a metal oxide comprising a metal, and where the metal comprises cobalt, iron, ruthenium, nickel, or a combination comprising one or more of the foregoing.

13 . A process of adjusting a H 2 :CO ratio in a methane stream reforming gas, comprising:
contacting the methane steam reforming gas and an additional carbon dioxide in a contacting zone under isothermal conditions at a temperature of 620 to 650° C.; wherein the methane steam reforming gas comprises CO and H 2 and has a H:CO ratio of greater than or equal to 4; and reacting CO 2 and the H 2 in the presence of a manganese oxide-copper oxide catalyst to produce a product stream having a H 2 :CO ratio of less than or equal to 2.5; and removing water from the contacting zone.

14 . The process of claim 13 , further comprising using the product stream of in a Fischer-Tropsch reaction.

15 . The process of claim 13 , wherein the contacting is at a temperature of 630 to 650° C.

16 . The process of claim 13 , further comprising adding the methane steam reforming gas and the additional carbon dioxide in a volume ratio of 2 to 4.

17 . The process of claim 13 , wherein the water is removed such that less than or equal to 0.05 vol % water is present in the contacting zone.

18 . The process of claim 13 , wherein the contacting occurs in the presence of a manganese oxide-copper oxide catalyst.

19 . The process of claim 18 , wherein the manganese oxide-copper oxide catalyst comprises 40 to 95 wt % of a support based on the total weight of the metal oxide and support.

20 . The process of claim 19 , wherein the manganese oxide-copper oxide catalyst comprises one or both of 1 to 50 wt % of manganese and 0.1 to 95 wt % of copper; based on the total weight of the manganese oxide-copper oxide catalyst and support.

Assignees

• Saudi Basic Ind Corp

Inventors

• Mammadov Aghaddin Kh
• Shaikh Shahid
• Rea Clark David

Classifications

• C10G2/332

  of the iron-group · CPC title

• B01J23/8892

  Manganese · CPC title

• C10G2/333

  of the platinum-group · CPC title

• C01B3/00 Primary

  Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen; Reversible storage of hydrogen (production of water-gas or synthesis gas from solid carbonaceous material C10J) · CPC title

• C10G2300/1025

  Natural gas · CPC title