High-temperature steam electrolysis device, hydrogen production method, and hydrogen production system

Patent metadata

Field	Value
Publication number	US-2024327995-A1
Application number	US-202218291722-A
Country	US
Kind code	A1
Filing date	Apr 14, 2022
Priority date	Jul 30, 2021
Publication date	Oct 3, 2024
Grant date	—

Abstract

A high-temperature steam electrolysis device, a hydrogen production method, and a hydrogen production system include: a high-temperature steam electrolysis cell having a cylindrical shape in which a hydrogen/steam gas diffusion electrode layer is disposed on an inner side of an electrolyte layer and an oxygen gas diffusion electrode layer is disposed on an outer side thereof; a steam flow channel in which high-temperature steam flows on an inner side of the high-temperature steam electrolysis cell; and a helium flow channel in which high-temperature helium flows to heat the high-temperature steam electrolysis cell on an outer side of the high-temperature steam electrolysis cell.

First claim

1 . A high-temperature steam electrolysis device comprising:
a high-temperature steam electrolysis cell having a cylindrical shape in which a hydrogen/steam gas diffusion electrode layer is disposed on an inner side of an electrolyte layer and an oxygen gas diffusion electrode layer is disposed on an outer side thereof; a steam flow channel in which high-temperature steam flows on an inner side of the high-temperature steam electrolysis cell; and a helium flow channel in which high-temperature helium flows to heat the high-temperature steam electrolysis cell on an outer side of the high-temperature steam electrolysis cell.

2 . The high-temperature steam electrolysis device according to claim 1 , wherein a pressure of the high-temperature steam flowing in the steam flow channel is higher than a pressure of the high-temperature helium flowing in the helium flow channel.

3 . The high-temperature steam electrolysis device according to claim 1 , comprising a guide cylinder disposed on the outer side of the high-temperature steam electrolysis cell, wherein the helium flow channel is disposed on an outer side of the guide cylinder, and an oxygen flow channel is disposed between the high-temperature steam electrolysis cell and the guide cylinder.

4 . The high-temperature steam electrolysis device according to claim 3 , wherein a thickness of the guide cylinder on a downstream side of a flowing direction of the high-temperature steam is smaller than a thickness thereof on an upstream side of the flowing direction of the high-temperature steam.

5 . The high-temperature steam electrolysis device according to claim 3 , wherein an emissivity of the guide cylinder on a downstream side of a flowing direction of the high-temperature steam is larger than an emissivity thereof on an upstream side of the flowing direction of the high-temperature steam.

6 . The high-temperature steam electrolysis device according to claim 1 , wherein the high-temperature steam electrolysis cell is heated by using helium heated by thermal energy at 600° C. or higher.

7 . The high-temperature steam electrolysis device according to claim 1 , wherein steam is heated by using helium heated by thermal energy at 600° C. or higher.

8 . A hydrogen production method comprising the steps of:
causing high-temperature steam to flow on an inner side of a high-temperature steam electrolysis cell having a cylindrical shape in which a hydrogen/steam gas diffusion electrode layer is disposed on an inner side of an electrolyte layer and an oxygen gas diffusion electrode layer is disposed on an outer side thereof; and causing high-temperature helium to flow on an outer side of the high-temperature steam electrolysis cell to heat the high-temperature steam electrolysis cell.

9 . A hydrogen production system comprising:
a heat exchanger that heats steam by using high-temperature helium heated by thermal energy at 600° C. or higher; the high-temperature steam electrolysis device according to claim 1 that produces hydrogen by using the steam heated by the high-temperature helium; and a heating device that heats the high-temperature steam electrolysis device by using the high-temperature helium heated by the thermal energy.

Assignees

• Mitsubishi Heavy Ind Ltd

Inventors

• Usui Yukinori
• Asano Koji
• Koshiro Ikumasa
• Hara Nobuhide

Classifications

• C25B9/23

  comprising ion-exchange membranes in or on which electrode material is embedded · CPC title

• C25B9/67

  Heating or cooling means · CPC title

• C25B15/021

  of heating or cooling · CPC title

• C25B11/032

  Gas diffusion electrodes · CPC title

• C25B9/015

  Cylindrical cells · CPC title