Method for hydrogenation of CO2 in adiabatic metal reactors

Patent metadata

Field	Value
Publication number	US-9745235-B2
Application number	US-201415034937-A
Country	US
Kind code	B2
Filing date	Nov 6, 2014
Priority date	Nov 11, 2013
Publication date	Aug 29, 2017
Grant date	Aug 29, 2017

Abstract

In an embodiment: a method of making syngas in a metal reactor can comprise introducing carbon dioxide and hydrogen to the metal reactor in the presence of a catalyst to form the syngas, wherein the metal reactor comprises nickel and wherein the carbon dioxide and the hydrogen are in physical contact with a wall of the metal reactor; and passivating the nickel with a sulfur containing compound.

First claim

We claim:

1. A method of making syngas in a metal reactor comprising:
introducing carbon dioxide and hydrogen to the metal reactor in the presence of a catalyst to form the syngas, wherein a wall of the metal reactor comprises nickel and wherein the carbon dioxide and the hydrogen are in physical contact with the wall of the metal reactor; and
passivating the nickel in the reactor walls with a sulfur containing compound.

2. The method of claim 1 , wherein the passivating comprises an initial passivating that occurs prior to the introducing of the carbon dioxide and hydrogen and/or an intermittent passivating that occurs after the introducing of the carbon dioxide and hydrogen.

3. The method of claim 2 , wherein the initial passivating and/or the intermittent passivating occurs for 4 to 24 hours.

4. The method of claim 2 , wherein the passivating comprises initial passivating and the method further comprises adding the catalyst to the metal reactor after the initial passivating.

5. The method of claim 2 , wherein the intermittent passivating occurs after a pressure in the metal reactor is less than or equal to 0.1 MPa.

6. The method of claim 2 , further comprising introducing an oxygen stream at a temperature of greater than or equal to 500° C. during or after the intermittent passivating.

7. The method of claim 2 , further comprising removing the catalyst prior to the intermittent passivating.

8. The method claim 1 , wherein the passivating comprises a continuous passivating that occurs simultaneously with the introducing of the carbon dioxide and hydrogen by introducing the sulfur containing compound to the reactor in a sulfur stream.

9. The method of claim 8 , wherein the passivating comprises an initial passivating that occurs prior to the introducing of the carbon dioxide and hydrogen.

10. The method of claim 9 , further comprising adding the catalyst to the metal reactor after the initial passivating.

11. The method of claim 8 , wherein the sulfur containing compound is introduced in an amount of 0.1 to 8 vol % based on the total volume introduced to the reactor.

12. The method of claim 1 , wherein the reactor is an adiabatic reactor.

13. The method of claim 1 , wherein the reactor comprises stainless steel.

14. The method of claim 1 , wherein reactor comprises 0.1 to 20 wt % nickel.

15. The method of claim 1 , wherein the carbon dioxide and the hydrogen are introduced at a CO 2 :H 2 ratio of 1:1 to 1:10.

16. The method of claim 1 , wherein the syngas has a H 2 :CO ratio of 0.1 to 10.

17. The method of claim 1 , wherein the catalyst comprises a metal oxide catalyst.

18. The method of claim 1 , wherein the metal comprises Cr, Mn, Sn, W, V, Mo, La, Ce, Pb, Mg, Ca, K, W, Cu, or a combination comprising one or more of the foregoing.

19. The method of claim 1 , further comprising using the syngas in a methanol production reaction.

20. The method of claim 1 , further comprising combining the syngas with a second syngas from a different syngas source.

Assignees

• Saudi Basic Ind Corp

Inventors

• Mammadov Aghaddin Kh
• Rea Clark David

Classifications

• B01J37/20

  Sulfiding · CPC title

• B01J23/24

  Chromium, molybdenum or tungsten · CPC title

• B01J19/02

  Apparatus characterised by being constructed of material selected for its chemically-resistant properties · CPC title

• Y02P20/52

  using catalysts, e.g. selective catalysts · CPC title

• C07C29/1518 Primary

  one step being the formation of initial mixture of carbon oxides and hydrogen for synthesis · CPC title