Anticoking catalyst coatings with alumina barrier layer

Patent metadata

Field	Value
Publication number	US-9901892-B2
Application number	US-201314651240-A
Country	US
Kind code	B2
Filing date	Nov 20, 2013
Priority date	Dec 13, 2012
Publication date	Feb 27, 2018
Grant date	Feb 27, 2018

Abstract

An article including a metal substrate, an anti-coking catalyst layer and an alumina barrier layer disposed between the metal substrate and the anti-coking catalyst layer is provided. A process for making the article is also provided.

First claim

The invention claimed is:

1. An article, comprising:
a metal substrate;
an anti-coking catalyst layer; and
an alumina barrier layer disposed between the metal substrate and the anti-coking catalyst layer,
wherein said alumina barrier layer comprises α-alumina.

2. The article of claim 1 , wherein the metal substrate is a tube having an inner surface, and the alumina barrier layer is disposed over the inner surface of the tube and the anti-coking catalyst layer is disposed on the alumina layer.

3. The article of claim 1 , wherein the metal substrate comprises at least one of chromium, nickel and iron.

4. The article of claim 1 , wherein the metal substrate contains less than 3 wt % aluminum.

5. The article of claim 1 , wherein the metal substrate contains less than 0.05 wt % aluminum.

6. The article of claim 1 , wherein the anti-coking catalyst comprises perovskite.

7. The article of claim 6 , wherein the perovskite is selected from the group consisting of doped LaCrO 3 , doped LaMnO 3 , BaCeO 3 , BaZrO 3 , BaCe x Zr (1-x) O 3 , BaCe x Y (1-x) O 3 and combinations thereof, wherein 0≦x≦1.

8. The article of claim 7 , wherein the perovskite is BaCe x Zr (1-x) O 3 , wherein 0≦x≦1.

9. The article of claim 7 , wherein the perovskite is BaCe 0.7 Zr 0.3 O 3 .

10. An article, comprising:
a metal substrate;
an anti-coking catalyst layer, wherein said anti-coking catalyst comprises perovskite, said perovskite selected from the group consisting of doped LaCrO 3 , doped LaMnO 3 , BaCeO 3 , BaZrO 3 , BaCe x Zr (1-x) O 3 , BaCe x Y (1-x) O 3 and combinations thereof, wherein 0≦x≦1; and
an alumina barrier layer disposed between the metal substrate and the anti-coking catalyst layer,
wherein said perovskite is BaCe x Zr (1-x) O 3 , wherein 0≦x≦1.

11. The article as in claim 10 , wherein the perovskite is BaCe 0.7 Zr 0.3 O 3 .

12. An article, comprising:
a metal substrate;
an anti-coking catalyst layer; and
an alumina barrier layer disposed between the metal substrate and the anti-coking catalyst layer,
wherein the metal substrate contains less than 3 wt % aluminum.

Assignees

• Gen Electric

Inventors

• Guo Minghu
• Lin Chuan
• Gu Yanfei
• Peng wen qing
• Kool Lawrence Bernard
• Zhou Hong
• Yang Zhaohui

Classifications

• B01J2235/15

  X-ray diffraction · CPC title

• B01J35/733

  Perovskite-type · CPC title

• C23C24/06

  Compressing powdered coating material, e.g. by milling · CPC title

• B05D1/02

  performed by spraying · CPC title

• C23C8/10

  Oxidising · CPC title