Use of lanthanide oxides to reduce sintering of catalysts

Patent metadata

Field	Value
Publication number	US-9731273-B2
Application number	US-201615077220-A
Country	US
Kind code	B2
Filing date	Mar 22, 2016
Priority date	Jul 11, 2013
Publication date	Aug 15, 2017
Grant date	Aug 15, 2017

Abstract

Disclosed is a lanthanide oxide coated catalyst, and methods for its use, that includes a supported catalyst comprising a support material, a catalytic material, and a lanthanide oxide, wherein the lanthanide oxide is attached to at least a portion of the surface of the supported catalyst.

First claim

The invention claimed is:

1. A lanthanide oxide coated catalyst comprising:
(a) a supported catalyst comprising a support material and a catalytic material; and
(b) a lanthanide oxide coating that coats at least a portion of the supported catalyst,
wherein the lanthanide oxide coating includes at least 2 wt. % lanthanide oxide;
wherein the catalytic material comprises at least one catalytic metal selected from the group consisting of Pt, Pd, Ru and Ir.

2. The lanthanide oxide coated catalyst of claim 1 , wherein a weight ratio of the lanthanide oxide to the catalytic material is 5:1 to 10:1.

3. The lanthanide oxide coated catalyst of claim 2 , wherein the weight ratio of the lanthanide oxide to the catalytic material is 6:1 to 8:1.

4. The lanthanide oxide coated catalyst of claim 1 , comprising 0.1 wt. % to 20 wt. % catalytic material.

5. The lanthanide oxide coated catalyst of claim 1 , wherein the weight ratio of the lanthanide oxide to the supported catalyst is from 5:100 to 20:100.

6. The lanthanide oxide coated catalyst of claim 1 , comprising 99 to 50 wt. % of the support material.

7. The lanthanide oxide coated catalyst of claim 1 , wherein the lanthanide oxide coating includes 2 to 50 wt. % lanthanide oxide.

8. The lanthanide oxide coated catalyst of claim 1 , wherein the catalytic material comprises at least one catalytic metal selected from the group consisting of Pd and Ir.

9. The lanthanide oxide coated catalyst of claim 8 , wherein the catalytic metal is Pt.

10. The lanthanide oxide coated catalyst of claim 1 , wherein the lanthanide oxide is CeO 2 , La 2 O 3 , Gd 2 O 3 , or any combination thereof.

11. The lanthanide oxide coated catalyst of claim 1 , wherein the support material comprises at least one member selected from the group consisting of Al 2 O 3 , MgAl 2 O 3 , kaolinite, TiO 2 , ZrO 2 and SiO 2 , or any combination thereof.

12. The lanthanide oxide coated catalyst of claim 11 , wherein the support material is kaolinite.

13. The lanthanide oxide coated catalyst of claim 11 , wherein the catalytic metal is Pt and the lanthanide oxide is CeO 2 .

14. The lanthanide oxide coated catalyst of claim 1 , wherein the catalytic material is a catalytic metal.

15. The lanthanide oxide coated catalyst of claim 1 , wherein the support material is Al 2 O 3 .

16. A method of producing a gaseous mixture comprising contacting a reactant gas mixture comprising a hydrocarbon and an oxidant with the lanthanide oxide coated catalyst of claim 1 at a reaction temperature of 700° C. to 1100° C. to produce a gaseous mixture comprising hydrogen and carbon monoxide.

17. The method of claim 16 , wherein the reaction temperature is 800° C. to 1000° C.

18. The method of claim 16 , wherein the lanthanide oxide coating reduces sintering of the catalytic material.

19. The method of claim 16 , wherein the hydrocarbon is methane and the oxidant is carbon dioxide.

Assignees

• Sabic Global Technologies Bv

Inventors

• D'Souza Lawrence
• Viswanath Vinu

Classifications

• B01J2235/30

  Scanning electron microscopy; Transmission electron microscopy · CPC title

• B01J35/393

  Metal or metal oxide crystallite size · CPC title

• C01B2203/0238

  the reforming step being a carbon dioxide reforming step · CPC title

• B01J23/63

  with rare earths or actinides · CPC title

• C01B3/26

  using catalysts · CPC title