Solid carbon production device and solid carbon production method

Patent metadata

Field	Value
Publication number	US-12528701-B2
Application number	US-202117916680-A
Country	US
Kind code	B2
Filing date	Mar 29, 2021
Priority date	Apr 6, 2020
Publication date	Jan 20, 2026
Grant date	Jan 20, 2026

Abstract

Provided is a solid carbon production facility including: a separation facility configured to separate a carbon dioxide gas contained in a produced gas produced by a blast furnace; a reaction facility configured to heat a fuel gas whose main component is a methane gas by using a heating facility and decompose the methane gas into solid carbon and a hydrogen gas; and a production facility configured to cause the carbon dioxide gas separated by the separation facility and the hydrogen gas decomposed by the reaction facility to react with each other to produce solid carbon and water.

First claim

The invention claimed is:

1 . A solid carbon production device comprising:
a separation unit configured to separate a carbon dioxide gas contained in a produced gas produced by a blast furnace; a reaction unit configured to heat a fuel gas whose main component is a methane gas by using a heating source and decompose the methane gas into solid carbon and a hydrogen gas; and a production unit configured to cause the carbon dioxide gas separated by the separation unit and the hydrogen gas decomposed by the reaction unit to react with each other to produce solid carbon and water.

2 . The solid carbon production device according to claim 1 further comprising a fuel gas supply unit configured to supply the fuel gas to the reaction unit and the heating source,
wherein the heating source is configured to heat the fuel gas supplied from the fuel gas supply unit to the reaction unit by combusting the fuel gas supplied from the fuel gas supply unit.

3 . The solid carbon production device according to claim 2 further comprising a combustion gas supply unit configured to supply the separation unit with a combustion gas produced by combusting the fuel gas by using the heating source.

4 . The solid carbon production device according to claim 1 , wherein the heating source converts electric power into heat to heat the fuel gas.

5 . The solid carbon production device according to claim 1 further comprising a solid carbon supply line configured to supply the blast furnace with solid carbon decomposed by the reaction unit and solid carbon produced by the production unit.

6 . The solid carbon production device according to claim 5 , wherein the solid carbon supply line is configured to supply solid carbon decomposed by the reaction unit and solid carbon produced by the production unit to both a feedstock supply port from which iron ore and coke are supplied to the blast furnace and a pulverized coal supply port from which pulverized coal is supplied to the blast furnace.

7 . The solid carbon production device according to claim 5 , wherein the solid carbon supply line is configured to supply the whole amount of solid carbon decomposed by the reaction unit and solid carbon produced by the production unit to a pulverized coal supply port from which pulverized coal is supplied to the blast furnace.

8 . The solid carbon production device according to claim 5 further comprising a solid molding unit provided to the solid carbon supply line and configured to mix solid carbon decomposed by the reaction unit and solid carbon produced by the production unit with a binder to mold a granular solid carbonaceous material.

9 . A solid carbon production method comprising:
a separation step of separating a carbon dioxide gas contained in a produced gas produced by a blast furnace; a reaction step of heating a fuel gas whose main component is a methane gas by using a heating source and decomposing the methane gas into solid carbon and a hydrogen gas; and a production step of causing the carbon dioxide gas separated by the separation step and the hydrogen gas decomposed by the reaction step to react with each other to produce solid carbon and water.

Assignees

• Mitsubishi Heavy Ind Ltd

Inventors

• Hirata Takuya
• Horizoe Kouji

Classifications

• C21B7/002

  Evacuating and treating of exhaust gases · CPC title

• C21B5/06

  using top gas in the blast furnace process · CPC title

• C21B5/007

  Conditions of the cokes or characterised by the cokes used · CPC title

• C01B2203/1241

  Natural gas or methane · CPC title

• C01B2203/0811

  by combustion of fuel · CPC title