Method and reactor for producing synthesis gas from a carbon and hydrogen source in the presence of an oxy flame

Patent metadata

Field	Value
Publication number	US-11999618-B2
Application number	US-202118007973-A
Country	US
Kind code	B2
Filing date	Jun 3, 2021
Priority date	Jun 4, 2020
Publication date	Jun 4, 2024
Grant date	Jun 4, 2024

Abstract

The technology relates to a method of producing synthesis gas comprising carbon monoxide (CO) and hydrogen (H 2 ), wherein the synthesis gas is produced by a reduction reaction of a first flow comprising a carbon source and an excess of hydrogen in contact with an Oxy-flame. The hydrogen comes from a reducing stream, a first portion of which ends up in the first flow, and a second part of which is used to generate the Oxy-flame by combustion of the hydrogen in the presence of a second flow comprising oxygen (O 2 ), the second flow coming from an oxidizing stream. The first flow and the second flow are at a distance from each other such that the Oxy-flame supports the reaction between the carbon source and the hydrogen. A reactor, which can have different configurations, is also proposed for implementing the method.

First claim

The invention claimed is:

1. A method of producing synthesis gas comprising carbon monoxide (CO) and hydrogen (H 2 ), wherein the synthesis gas is produced by a reduction reaction of a first flow comprising a carbon source and an excess of hydrogen in contact with an Oxy-flame, and wherein:
the hydrogen comes from a reducing stream, a first part of which ends up in the first flow and a second part is used to generate the Oxy-flame by combustion of hydrogen in the presence of a second flow comprising oxygen (O 2 ), the second flow coming from an oxidizing stream,
the first flow and the second flow are at a distance from each other such that the Oxy-flame supports the reaction between the carbon source and the hydrogen,
the distance between the first flow and the second flow is comprised between 0.1 mm and 100 mm,
the carbon source comprises at least CO 2 , and
the reduction reaction is carried out in the absence of solid catalyst.

2. The method according to claim 1 , wherein the Oxy-flame generates ionic species and free radicals which promote the conversion of the carbon source to CO.

3. The method according to claim 1 , wherein the carbon source is CO 2 or comprises CO 2 in combination with:
at least one type of oxygenated molecules of formula C α H β O γ wherein α is between 1 and 5, β is between 2 and 10 and γ is between 1 and 4;
one or more hydrocarbons; or
a mixture thereof.

4. The method according to claim 1 , wherein the reduction reaction comprises a reverse reaction of gas to water or “Reverse Water Gas Shift”.

5. The method according to claim 1 , wherein the reducing stream is hydrogen.

6. The method according to claim 1 , wherein the reducing stream comprises hydrogen and the carbon source.

7. The method according to claim 1 , wherein the reducing stream comprises hydrogen and the carbon source comprising at least CO 2 .

8. The method according to claim 1 , wherein the oxidizing stream is oxygen.

9. The method according to claim 1 , wherein the oxidizing stream comprises oxygen and the carbon source the carbon source comprising at least CO 2 .

10. The method according to claim 1 , wherein the reducing stream comprises only hydrogen, the oxidizing stream comprises only oxygen and the carbon source is supplied by an independent stream.

11. The method according to claim 10 , wherein the independent stream comprises CO 2 or the independent stream comprises CO 2 and methane.

12. The method according to claim 1 , wherein the oxygen comes from a water electrolysis reaction and/or the hydrogen comes from a water electrolysis reaction and/or the carbon source comes from a gas mixture resulting from a biomass gasification or pyrolysis process.

13. The method according to claim 1 , wherein the reduction reaction is carried out at an average temperature of at least 600° C.

14. The method according to claim 1 , wherein the distance between the first flow and the second flow is comprised between 0.3 mm and 50 mm.

15. The method according to claim 1 , wherein the reduction reaction is carried out using an H 2 /CO 2 molar ratio of between 2 and 7.

16. The method according to claim 1 , wherein the reduction reaction is carried out using an O 2 /CO 2 molar ratio of between 0.35 and 0.9.

17. The method according to claim 1 , wherein the reduction reaction is carried out using an O 2 /H 2 molar ratio of between 0.1 and 0.3.

18. The method according to claim 1 , wherein the carbon source is CO 2 , or comprises CO 2 and at least one hydrocarbon.

19. The method according to claim 1 , wherein the carbon source is CO 2 .

20. The method according to claim 1 , wherein the carbon source comprises CO 2 and methane.

Assignees

• Hydro Quebec

Inventors

• Labrecque Raynald
• Schulz Robert
• Vienneau Michel
• Larocque Germain

Classifications

• C01B2203/0255

  containing a non-catalytic partial oxidation step · CPC title

• C01B3/12

  by reaction of water vapour with carbon monoxide · CPC title

• C01B3/363 Primary

  characterised by the burner · CPC title

• B01J19/0013

  Controlling the temperature of the process · CPC title

• B01J19/2415

  Tubular reactors · CPC title