CO2 Electrolysis Apparatus Voltage-Controlled Gas Switching
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Solution Overview
Problem
Existing carbon dioxide electrolysis apparatuses do not efficiently utilize renewable energy to produce a useful fuel by optimizing the ratio of carbon compounds and hydrogen generated, as they rely solely on electrolysis without controlling the carbon dioxide supply based on voltage fluctuations.
Innovation Solution
A carbon dioxide electrolysis apparatus that includes an electrolysis stack, a carbon dioxide supply unit controlled by a processor, storage units for gases generated during and after carbon dioxide supply, and a reactor where the stored gases react to produce renewable fuels, with a voltage sensor to manage the carbon dioxide supply based on detected voltage levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carbon dioxide is continuously supplied to the electrolysis stack, then carbon compound production is maintained, but hydrogen gas generation is wasted when voltage is insufficient
Solution Approach 1:
The system dynamically adjusts carbon dioxide supply based on real-time voltage detection. When voltage exceeds the threshold, CO2 supply is activated for carbon compound production. When voltage drops below the threshold, CO2 supply is stopped to prevent hydrogen waste, allowing the system to adapt to voltage fluctuations and optimize resource utilization
Solution Approach 2:
The control unit continuously monitors voltage through the voltage sensor and uses this feedback to control the carbon dioxide supply unit. This closed-loop control ensures that CO2 is only supplied when voltage conditions are suitable for efficient carbon compound production, preventing energy waste when voltage is insufficient
2Ease of manufacture
If the apparatus only performs electrolysis without a reactor, then the system is simpler, but the generated hydrogen and carbon compounds cannot be converted into useful fuels
Solution Approach 1:
The system merges the electrolysis stack with a reactor to create an integrated apparatus. The electrolysis stack generates carbon compounds and hydrogen, which are then directed to the reactor where they undergo chemical reactions to produce useful fuels. This combination enables the system to not only generate gases but also convert them into valuable products
Solution Approach 2:
The apparatus is designed to perform multiple functions: the electrolysis stack generates both carbon compounds and hydrogen gas, while the reactor converts these gases into useful fuels. This multi-functionality transforms a single-purpose electrolysis system into a comprehensive fuel production system that addresses both gas generation and fuel synthesis
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
This apparatus efficiently produces carbon compounds and hydrogen by switching the carbon dioxide supply according to renewable energy fluctuations, allowing them to react at optimal ratios within the reactor, thereby enhancing the overall efficiency and productivity of the system.
Implementation Method 1
an electrolysis stack configured to perform electrolysis using electric power generated by renewable energy
Implementation Method 2
a voltage sensor configured to detect a voltage of the electrolysis stack
Implementation Method 3
a reactor to which the first gas stored in the first storage unit and the second gas stored in the second storage unit are guided
Data Source
AI summary
CO2 electrolysis apparatus includes: electrolysis stack configured to perform electrolysis using electric power generated by renewable energy; CO2 supply unit configured to supply CO2 to electrolysis stack; first storage unit configured to store first gas generated by electrolysis in electrolysis stack when CO2 is supplied; second storage unit configured to store second gas generated by electrolysis in electrolysis stack when supply of CO2 is stopped; reactor to which first and second gas stored in first and second storage unit are guided; voltage sensor configured to detect voltage of electrolysis stack; and control unit including processor and memory and configured to control CO2 supply unit to supply CO2 to electrolysis stack when detected voltage exceeds predetermined value and configured to control CO2 supply unit to stop supply of CO2 when detected voltage is equal to or less than predetermined value.