Metal porous body, water vapor reformer including the same, and method for manufacturing metal porous body

Patent metadata

Field	Value
Publication number	US-11938471-B2
Application number	US-201917265909-A
Country	US
Kind code	B2
Filing date	Jun 21, 2019
Priority date	Sep 14, 2018
Publication date	Mar 26, 2024
Grant date	Mar 26, 2024

Abstract

A metal porous body has a skeleton of a three-dimensional network structure, an outer layer portion of the skeleton having a second pore smaller in size than a first pore formed by the skeleton, wherein the outer layer portion is a metal layer, and a water vapor reforming catalyst is supported in the outer layer portion.

First claim

The invention claimed is:

1. A metal porous body having a skeleton of a three-dimensional network structure, an outer layer portion of the skeleton having second pores smaller in size than first pores formed by the skeleton,
wherein the outer layer portion is a metal layer,
a water vapor reforming catalyst is supported in the outer layer portion,
the metal layer includes a first metal and a second metal,
the first metal includes Ni, and
the second metal includes Sn.

2. The metal porous body according to claim 1 , wherein the metal layer includes an alloy layer of the first metal and the second metal, and
a first phase and a second phase coexist in the alloy layer, the first phase and the second phase being different in concentration of the second metal with respect to the first metal.

3. The metal porous body according to claim 1 , wherein a porosity is 70 to 98%.

4. The metal porous body according to claim 1 , wherein the first pores have a pore size of 100 μm to 4000 μm.

5. The metal porous body according to claim 1 , wherein the second pores have a pore size of 0.2 μm to 20 μm.

6. The metal porous body according to claim 1 , wherein the water vapor reforming catalyst includes a metal catalyst including Ni, and a support supporting the metal catalyst,
the metal catalyst further includes at least one selected from the group consisting of Co and Ru, and
the support is LaNbO 4 or La 1-x Sr x NbO 4 , where x is greater than 0 and equal to or less than 0.12.

7. A water vapor reformer comprising:
a reaction chamber where a gas containing hydrocarbon is reacted with a water vapor to produce a reforming gas containing hydrogen; and
the metal porous body as recited in claim 1 ,
wherein the metal porous body is housed in the reaction chamber.

8. The water vapor reformer according to claim 7 , wherein a reaction temperature of a water vapor reforming reaction is 600° C. to 800° C.

9. A method for manufacturing the metal porous body as recited in claim 1 , the method comprising:
a first plating step of plating a template having a three-dimensional network structure with a first metal;
a second plating step of plating the template subjected to the first plating step with a second metal;
in the first plating step and/or the second plating step, attaching microspheres to a surface of the template together with the first metal or the second metal;
removing the microspheres and the template, to form a metal porous body; and
supporting a water vapor reforming catalyst in a surface of the metal porous body.

10. The method for manufacturing the metal porous body according to claim 9 , wherein the attaching microspheres is performed in the second plating step.

11. The method for manufacturing the metal porous body according to claim 9 , wherein the attaching microspheres is performed in the first plating step, and the second plating step is performed after the removing the microspheres.

12. The method for manufacturing the metal porous body according to claim 9 , wherein in the forming a metal porous body, heat treatment is performed under a reducing atmosphere, to form an alloy layer of the first metal and the second metal on at least an outer layer of the metal porous body.

Assignees

• Sumitomo Electric Industries

Inventors

• Hiraiwa Chihiro
• Mizuhara Naho
• Ogawa Mitsuyasu
• Higashino Takahiro
• Tawarayama Hiromasa
• Majima Masatoshi
• Ogasawara Yoshitaka

Classifications

• B01J2235/00

  Indexing scheme associated with group B01J35/00, related to the analysis techniques used to determine the catalysts form or properties · CPC title

• B01J2235/30

  Scanning electron microscopy; Transmission electron microscopy · CPC title

• B01J35/37

  Crush or impact strength · CPC title

• B01J35/30

  characterised by their physical properties · CPC title

• B01J37/0244 Primary

  Coatings comprising several layers · CPC title