Steam reforming catalyst and fuel cell system using the same

Patent metadata

Field	Value
Publication number	US-2021213430-A1
Application number	US-201917056018-A
Country	US
Kind code	A1
Filing date	May 22, 2019
Priority date	Jun 20, 2018
Publication date	Jul 15, 2021
Grant date	—

Abstract

A steam reforming catalyst that promotes production of hydrogen from a gas containing a hydrocarbon in the presence of steam includes a carrier and two or more catalyst metals supported on the carrier and including a first metal and a second metal. The first metal includes Ni, the second metal includes at least one of Co and Ru, and the carrier is represented by LaNbO 4 or La 1-x Sr x NbO 4 where x is in a range of 0<x≤0.12.

First claim

1 . A steam reforming catalyst that promotes production of hydrogen from a gas containing a hydrocarbon in the presence of steam, the steam reforming catalyst comprising:
a carrier; and two or more catalyst metals supported on the carrier and including a first metal and a second metal, wherein the first metal includes Ni, the second metal includes at least one of Co and Ru, and the carrier is represented by LaNbO 4 or La 1-x Sr x NbO 4 where x is in a range of 0<x≤0.12.

2 . The steam reforming catalyst according to claim 1 , wherein the carrier is formed of La 1-x Sr x NbO 4 where x is in a range of 0.08≤x≤0.12.

3 . The steam reforming catalyst according to claim 1 , wherein the second metal includes at least Co.

4 . The steam reforming catalyst according to claim 1 ,
wherein a content of the catalyst metals is 1% by mass or more and 5% by mass or less based on a total of the catalyst metals and the carrier, and a content of the second metal is 0.15% by mass or more and 0.5% by mass or less based on the total of the catalyst metals and the carrier.

5 . The steam reforming catalyst according to claim 1 , wherein the carrier is supported on a porous body.

6 . The steam reforming catalyst according to claim 1 , wherein the hydrocarbon includes propane.

7 . The steam reforming catalyst according to claim 1 , wherein the gas containing a hydrocarbon is a mixed gas containing the hydrocarbon and oxygen.

8 . A fuel cell system comprising:
a fuel cell that includes a cell structure including a cathode, an anode, and a solid electrolyte layer disposed between the cathode and the anode, a cathode-side separator disposed on a cathode side with respect to the solid electrolyte layer, an anode-side separator disposed on an anode side with respect to the solid electrolyte layer, an oxidant channel which is formed between the cathode-side separator and the cathode and through which an oxidant is supplied to the cathode, and a fuel channel which is formed between the anode-side separator and the anode and through which a fuel is supplied to the anode; and a steam reformer that includes the steam reforming catalyst according to claim 1 .

9 . The fuel cell system according to claim 8 , wherein an operating temperature of the fuel cell and a reaction temperature of the steam reformer are each 400° C. or higher and 600° C. or lower.

Assignees

• Sumitomo Electric Industries

Inventors

• Hiraiwa Chihiro
• Majima Masatoshi
• Higashino Takahiro
• Mizuhara Naho
• Tawarayama Hiromasa

Classifications

• Y02P20/52

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

• H01M8/0618

  Reforming processes, e.g. autothermal, partial oxidation or steam reforming · CPC title

• C01B2203/1058

  Nickel catalysts · CPC title

• C01B2203/1052

  Nickel or cobalt catalysts · CPC title

• C01B3/40

  characterised by the catalyst · CPC title