Blast Furnace Solid Carbon Production from CO2 and Methane
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Solution Overview
Problem
Existing methods for reducing carbon dioxide in blast furnaces require additional facilities and energy for moisture removal and methane conversion, and the resulting methane-based reducing agent differs from traditional coke, necessitating separate supply systems.
Innovation Solution
A device and method that separates carbon dioxide from blast furnace gases, decomposes methane into solid carbon and hydrogen, and reacts them to produce solid carbon, which can be supplied to the blast furnace using existing facilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If moisture is removed from the gas containing methane by cooling or adsorption, then moisture removal is achieved, but facility complexity and energy consumption increase
Solution Approach 1:
The patent extracts and removes the moisture removal step entirely from the process. Instead of cooling or adsorbing moisture from the gas containing methane, the invention directly uses the methane as decomposed in the reaction unit, eliminating the need for separate moisture removal facilities and reducing overall system complexity.
Solution Approach 2:
The reaction unit itself handles the moisture issue by decomposing methane into solid carbon and hydrogen gas. The process is self-sufficient, generating its own hydrogen in situ without requiring external moisture removal systems, thereby reducing facility complexity and energy consumption.
2Productivity
If additional facilities are provided for methane conversion and supply, then solid carbon production is achieved, but facility complexity increases
Solution Approach 1:
The patent merges the methane decomposition function and hydrogen generation function into a single reaction unit. This integration eliminates the need for separate facilities for methane conversion and hydrogen supply, reducing facility complexity while maintaining solid carbon production capability.
Solution Approach 2:
The reaction unit serves multiple functions: it decomposes methane, generates hydrogen gas in situ, and produces solid carbon. This multi-functionality reduces the number of separate facilities needed, thereby reducing overall facility complexity while achieving the production goal.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables the production of solid carbon as a reducing agent directly from carbon dioxide, simplifying facilities and supply processes, and aligning it with existing coke supply systems.
Implementation Method 1
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
Implementation Method 2
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
Data Source
AI summary
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.