Methanation catalyst

Patent metadata

Field	Value
Publication number	US-9908104-B2
Application number	US-201414901523-A
Country	US
Kind code	B2
Filing date	Jun 27, 2014
Priority date	Jun 28, 2013
Publication date	Mar 6, 2018
Grant date	Mar 6, 2018

Abstract

The invention relates to a catalyst, comprising a catalytic element disposed on a substrate, wherein said substrate has formula Ce 1-x M x O 2 , wherein x is between about 0 and about 0.3, optionally between about 0.01 and about 0.3, and wherein M, if present, is a metallic element other than Ce, when used for catalysing a methanation reaction. There is also described use of the catalyst for catalysing a methanation reaction and a method for methanation of a feedstock including carbon monoxide and hydrogen, said method comprising contacting the feedstock with the catalyst.

First claim

The invention claimed is:

1. A method for methanation of a feedstock including carbon monoxide and hydrogen, said method comprising contacting the feedstock with a catalyst, said catalyst comprising a catalytic element selected from the group consisting of Co, Fe, Pt, Ru, Rh, Pd, Ni and Ir disposed on a substrate, wherein said substrate has formula Ce 1-x M x O 2 , wherein x is between about 0.01 and about 0.3, and wherein M is a metallic element selected from the group consisting of Y, Gd, Sm and alkaline earth metals.

2. The method of claim 1 wherein the feedstock includes coal gasification effluent and/or biomass gasification effluent.

3. The method of claim 1 wherein the feedstock additionally includes a sulfur-containing gas or vapour.

4. The method of claim 3 , comprising a step of depositing the catalytic element on the substrate for reducing poisoning of the catalytic element by the sulfur-containing gas or vapor.

5. The method of claim 4 wherein said depositing is conducted before exposing said catalytic element to the sulfur-containing gas or vapour.

6. The method of claim 4 wherein the depositing is such that the catalytic element is present in discrete regions on the substrate.

7. The method of claim 3 wherein the sulfur-containing gas or vapour includes any one or more of hydrogen sulfide, carbonyl sulfide, sulfur dioxide or an organic thiol.

8. The method of claim 1 wherein the molar ratio of hydrogen to carbon monoxide in the feedstock is between about 4:1 and about 1:1.

9. The method of claim 1 wherein said contacting is conducted at a temperature of between about 250 ° C. and about 750 ° C.

10. The method of claim 1 wherein the temperature and feedstock gas hourly space velocity during said contacting are sufficient to achieve equilibrium conversion of carbon oxides to methane.

11. The method of claim 1 wherein the catalytic element is metallic nickel.

12. The method of claim 1 wherein the substrate is particulate.

13. The method of claim 1 wherein x is between about 0.01 and about 0.25.

14. The method of claim 1 wherein the catalyst includes regions of metallic nickel dispersed on a surface of the substrate.

15. The method of claim 1 wherein the catalyst includes between about 1% and about 40% of the catalytic element by weight.

16. The method of claim 1 wherein the substrate has a specific surface area of between about 10 m 2 /g and about 300 m 2 /g.

Assignees

• Agency Science Tech & Res
• Ihi Corp

Inventors

• Kamata Hiroyuki
• Chen Luwei
• Borgna Armando
• Izumi Yoshinori
• Chang Jie
• Choong Catherine Kai Shin

Classifications

• C10G2/333

  of the platinum-group · CPC title

• B01J23/002

  Mixed oxides other than spinels, e.g. perovskite · CPC title

• C07C1/043

  characterised by the composition · CPC title

• C07C1/044

  containing iron · CPC title

• C10G2/332

  of the iron-group · CPC title