CO2 Electrolysis Power Control for Stable Gas Concentration
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Solution Overview
Problem
Carbon dioxide electrolytic devices face instability in operation due to variations in renewable energy power sources, leading to fluctuations in CO2 concentration in produced gases, which affects the manufacturability and efficiency of valuable materials like gasoline and methanol.
Innovation Solution
A carbon dioxide electrolytic device with an integrated power control system, including a first and second power supply control unit and an integration control unit, regulates power supply to stabilize the operation and maintain consistent CO2 concentration by adjusting the flow rate of CO2 and electrolytic solutions, using a diaphragm to separate ions and facilitate controlled reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If variable power supply from renewable energy is used for CO2 electrolysis, then power adjustment and CO2 recycling can be performed simultaneously, but operation stability deteriorates and CO2 concentration in produced gas varies
Solution Approach 1:
The system dynamically adjusts the flow rates of CO2 gas and electrolytic solution in real-time based on variations in power supply from renewable energy sources. This dynamic adaptation allows the system to maintain stable operation and consistent CO2 concentration in produced gas despite fluctuations in input power, resolving the contradiction between adaptability to variable power and operational reliability.
2Use of energy by moving object
If power supply varies due to weather changes, then renewable energy utilization is improved, but CO2 reaction amount changes and produced gas concentration varies
Solution Approach 1:
The system incorporates feedback control mechanisms that continuously monitor power supply variations and adjust the flow rates of CO2 and electrolytic solution accordingly. This feedback loop ensures that despite changes in renewable energy input due to weather conditions, the CO2 reaction amount remains controlled and the produced gas concentration stays consistent, achieving both high renewable energy utilization and manufacturing precision.
3Productivity
If CO2 flow rate is increased to maintain concentration, then CO2 utilization efficiency is improved, but system complexity increases due to additional control mechanisms
Solution Approach 1:
The control system is designed to perform multiple functions simultaneously: it monitors power supply variations, adjusts CO2 and electrolytic solution flow rates, maintains CO2 concentration in produced gas, and optimizes CO2 utilization efficiency. By integrating these functions into a unified control mechanism, the system achieves high productivity without proportionally increasing complexity, as the same control architecture handles multiple objectives.
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
The system ensures stable operation and reduced CO2 concentration variation, enhancing the manufacturability and utility of valuable materials by effectively managing power fluctuations and optimizing reaction conditions.
Implementation Method 1
a diaphragm (18) which separates the first accommodation part (13) and the second accommodation part (16)
Implementation Method 2
carbon dioxide (CO2) is electrochemically reduced to be converted into chemical substances
Data Source
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AI summary
A carbon dioxide electrolytic device of an embodiment includes: an electrolysis cell including a first accommodation part for accommodating carbon dioxide, a second accommodation part for accommodating an electrolytic solution containing water, or water vapor, a diaphragm provided between the first accommodation part and the second accommodation part, a reduction electrode arranged in the first accommodation part, and an oxidation electrode arranged in the second accommodation part; a first power supply control unit capable of being connected to a first power supply which supplies power to the electrolysis cell; a second power supply control unit capable of being connected to a second power supply which supplies power to the electrolysis cell; and an integration control unit controlling the first power supply control unit and the second power supply control unit, and switching the supply of power from the first power supply or the second power supply to the electrolysis cell.