Hydrogen production apparatus and hydrogen production method

Patent metadata

Field	Value
Publication number	US-11617997-B2
Application number	US-202017108616-A
Country	US
Kind code	B2
Filing date	Dec 1, 2020
Priority date	Jun 5, 2018
Publication date	Apr 4, 2023
Grant date	Apr 4, 2023

Abstract

A hydrogen production apparatus includes: a first furnace configured to heat a mixed gas of a raw material gas, which contains at least methane, and hydrogen to 1,000° C. or more and 2,000° C. or less; and a second furnace configured to accommodate a catalyst for accelerating a reaction of a first gas generated in the first furnace to a nanocarbon material, and to maintain the first gas at 500° C. or more and 1,200° C. or less.

First claim

What is claimed is:

1. A hydrogen production apparatus, comprising:
a first furnace configured to heat a mixed gas of a raw material gas, which contains at least methane, and hydrogen to 1,000° C. or more and 2,000° C. or less;
a supplying unit that supplies the mixed gas to the first furnace; and
a second furnace configured to accommodate a catalyst for accelerating a reaction of a first gas generated in the first furnace to a nanocarbon material, and to maintain the first gas at 500° C. or more and 1,200° C. or less;
wherein the amount of the hydrogen in the mixed gas is 3 mol or more and 8 mol or less with respect to methane in the mixed gas; wherein the first furnace accommodates a catalyst for accelerating a reaction of the mixed gas to any one or both of acetylene and ethylene.

2. The hydrogen production apparatus according to claim 1 , further comprising a cooling unit configured to cool the first gas generated in the first furnace to 600° C. or less,
wherein the first gas cooled by the cooling unit is introduced into the second furnace.

3. The hydrogen production apparatus according to claim 1 , further comprising a heat transfer material arranged between the first furnace and the second furnace, wherein a furnace having a lower temperature of the first furnace and the second furnace uses heat released from a furnace having a higher temperature thereof as a heating source.

4. The hydrogen production apparatus according to claim 1 , wherein at least a heating source of the first furnace is a light collecting device configured to collect sunlight, and to generate solar heat.

5. The hydrogen production apparatus according to claim 1 , wherein the first gas comprises one or both of acetylene and ethylene.

6. A hydrogen production apparatus comprising:
a first furnace configured to heat a mixed gas of a raw material gas, which contains at least methane, and hydrogen to 1,000° C. or more and 2,000° C. or less;
a second furnace configured to accommodate a catalyst for accelerating a reaction of a first gas generated in the first furnace to a nanocarbon material, and to maintain the first gas at 500° C. or more and 1,200° C. or less; and
a preheating unit configured to preheat the raw material gas with heat released from the second furnace; wherein a first heat exchange unit configured to subject a second gas generated in the second furnace and the raw material gas to heat exchange, wherein the raw material gas subjected to heat exchange in the first heat exchange unit is introduced into the preheating unit.

7. The hydrogen production apparatus according to claim 6 , further comprising a second heat exchange unit configured to subject the first gas discharged from the first furnace and the raw material gas preheated by the preheating unit to heat exchange,
wherein the first gas subjected to heat exchange by the second heat exchange unit is introduced into the second furnace.

8. The hydrogen production apparatus according to claim 6 , wherein the first furnace accommodates a catalyst for accelerating a reaction of the mixed gas to any one or both of acetylene and ethylene.

9. The hydrogen production apparatus according to claim 6 , wherein the first gas comprises one or both of acetylene and ethylene.

10. A hydrogen production method, comprising:
heating a mixed gas of a raw material gas, which contains at least methane, and hydrogen to 1,000° C. or more and 2,000° C. or less to generate a first gas; and
maintaining the first gas at 500° C. or more and 1,200° C. or less to convert the first gas into a nanocarbon material;
wherein the amount of the hydrogen in the mixed gas is 3 mol or more and 8 mol or less with respect to methane in the mixed gas.

Assignees

• Ihi Corp

Inventors

• Kimura Hiroyuki
• Muramoto Tomoya
• Seo Satoshi

Classifications

• F24S23/79

  with spaced and opposed interacting reflective surfaces · CPC title

• F24S20/20

  Solar heat collectors for receiving concentrated solar energy, e.g. receivers for solar power plants · CPC title

• C01B32/16

  Preparation · CPC title

• B82Y40/00

  Manufacture or treatment of nanostructures · CPC title

• F24S23/71

  with parabolic reflective surfaces (with cylindro-parabolic reflective surfaces F24S23/74) · CPC title