Hydrogen production system and hydrogen production method

Patent metadata

Field	Value
Publication number	US-2024287687-A1
Application number	US-202218573565-A
Country	US
Kind code	A1
Filing date	Apr 15, 2022
Priority date	Jun 30, 2021
Publication date	Aug 29, 2024
Grant date	—

Abstract

A hydrogen production system and a hydrogen production method include a heat source that can generate thermal energy at 600° C. or higher, a heat exchanger that heats steam by using a heating medium heated by the thermal energy, a high-temperature steam electrolysis device that produces hydrogen by using the steam heated by the heating medium, and a heating device that heats the high-temperature steam electrolysis device by using the heating medium heated by the thermal energy.

First claim

1 . A hydrogen production system comprising:
a heat exchanger configured to heat steam by using a heating medium heated by thermal energy at 600° C. or higher; a high-temperature steam electrolysis device configured to produce hydrogen by using the steam heated by the heating medium; and a heating device configured to heat the high-temperature steam electrolysis device by using the heating medium heated by the thermal energy.

2 . The hydrogen production system according to claim 1 , wherein the heating device compensates for thermal energy that is lost by endothermic reaction when the high-temperature steam electrolysis device produces hydrogen.

3 . The hydrogen production system according to claim 1 , comprising: a steam generator configured to generate steam to be supplied to the high-temperature steam electrolysis device via a steam supply path, wherein the heat exchanger includes a first heat exchanger disposed on the steam supply path and a second heat exchanger disposed on a downstream side with respect to the first heat exchanger on the steam supply path, and the heating medium is supplied from the second heat exchanger to the first heat exchanger.

4 . The hydrogen production system according to claim 1 , comprising a steam generator configured to generate steam to be supplied to the high-temperature steam electrolysis device via a steam supply path,
wherein the heat exchanger includes
a first heat exchanger disposed on the steam supply path, and
a second heat exchanger disposed on a downstream side with respect to the first heat exchanger on the steam supply path, and
the heating medium is supplied to the first heat exchanger, and also supplied to the heating device from the second heat exchanger.

5 . The hydrogen production system according to claim 1 , wherein
the high-temperature steam electrolysis device includes an electrolyte layer, a hydrogen gas diffusion electrode layer, and an oxygen gas diffusion electrode layer, and the heating device heats the hydrogen gas diffusion electrode layer and the oxygen gas diffusion electrode layer.

6 . The hydrogen production system according to claim 5 , comprising:
a gas supply device configured to supply gas to the oxygen gas diffusion electrode layer; and a gas heating device configured to heat the gas to be supplied to the oxygen gas diffusion electrode layer by using the heating medium heated by the thermal energy.

7 . The hydrogen production system according to claim 1 , wherein
a high-temperature gas furnace is disposed as a heat source that is able to generate the thermal energy, and the heat exchanger heats steam by using a heating medium heated by thermal energy of high-temperature helium generated in the high-temperature gas furnace.

8 . The hydrogen production system according to claim 1 , wherein
a high-temperature gas furnace is disposed as a heat source that is able to generate the thermal energy, and the heating device heats the high-temperature steam electrolysis device by thermal energy of high-temperature helium generated in the high-temperature gas furnace.

9 . A hydrogen production method comprising the steps of:
generating thermal energy at 600° C. or higher; heating steam by using a heating medium heated by the thermal energy; heating a high-temperature steam electrolysis device by using the heating medium heated by the thermal energy; and producing hydrogen by the high-temperature steam electrolysis device by using the steam heated by the heating medium.

Assignees

• Mitsubishi Heavy Ind Ltd

Inventors

• Matsuo Takeshi
• Asano Koji
• Iwabuchi Hiroyuki
• Nakagiri Motohiro
• Koshiro Ikumasa
• Hara Nobuhide

Classifications

• C25B15/021

  of heating or cooling · CPC title

• C25B11/032

  Gas diffusion electrodes · CPC title

• C25B1/042 Primary

  by electrolysis of steam · CPC title

• C25B15/08

  Supplying or removing reactants or electrolytes; Regeneration of electrolytes · CPC title

• C25B9/67

  Heating or cooling means · CPC title