Highly active self-recoverable composite oxide catalyst for reverse water gas shift reaction

Patent metadata

Field	Value
Publication number	US-2016296916-A1
Application number	US-201514805077-A
Country	US
Kind code	A1
Filing date	Jul 21, 2015
Priority date	Apr 7, 2015
Publication date	Oct 13, 2016
Grant date	—

Abstract

A disclosure is related to a composite oxide catalyst for a reverse water gas shift (RWGS) reaction, which is a reaction for obtaining water and carbon monoxide by reacting hydrogen with carbon dioxide, and particularly, to a self-recoverable composite oxide catalyst for a reverse water gas shift reaction, which is composed of a compound of Ce 1-x M x O 2-0.5x (M is one element selected from the group consisting of Y, La, Nd, Sm, and Gd) and Fe 2 O 3 as a composite oxide, thus has an excellent thermal stability at high temperature, and has high carbon dioxide conversion and high carbon monoxide selectivity even under a strong reducing atmosphere, which is a process condition of the reverse water gas shift reaction. Also, the composite oxide exhibits excellent catalytic activity even at the reaction condition of low temperature such as 400° C., and thus enables a large amount of carbon dioxide to be removed at low cost.

First claim

What is claimed is:

1 . A composite oxide catalyst for a reverse water gas shift (RWGS) reaction,
wherein the catalyst is composed of a compound of Ce 1-x M x O 2-0.5x and Fe 2 O 3 as a composite oxide, and M is one element selected from the group consisting of Y, La, Nd, Sm, and Gd, and x is in a range of 0≦x≦0.5.

2 . The composite oxide catalyst of claim 1 , wherein M in Ce 1-x M x O 2-0.5x is Gd.

3 . The composite oxide catalyst of claim 1 , wherein the compound of Ce 1-x M x O 2-0.5x is included in a ratio of 10 to 50 mol % based on the entire composite oxide.

4 . The composite oxide catalyst of claim 1 , wherein the catalyst is capable of repeated redox reaction.

5 . The composite oxide catalyst of claim 1 , wherein when the catalyst is used for the reverse water gas shift reaction, the carbon dioxide conversion is 35% or more under a temperature condition of 400° C.

6 . The composite oxide catalyst of claim 1 , wherein when the catalyst is used for the reverse water gas shift reaction, the carbon monoxide selectivity is 80% or more under a temperature condition of 400° C.

Assignees

• Korea Inst Sci & Tech

Inventors

• Kim Joosun
• Bae Donghyun
• KIM Byungkook
• Yoon Miyoung

Classifications

• C10K3/026

  Increasing the carbon monoxide content, e.g. reverse water-gas shift [RWGS] · CPC title

• B01J37/08

  Heat treatment {(B01J37/0009, B01J37/0018 take precedence)} · CPC title

• B01J23/83 Primary

  with rare earths or actinides · CPC title

• B01J37/0036

  Grinding · CPC title

• B01J37/04

  Mixing {(B01J37/0009, B01J37/0018 take precedence)} · CPC title