Electrochemical CO2 Recovery System with Dynamic Desorption Control
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Solution Overview
Problem
Carbon dioxide recovery systems face challenges in optimizing desorption time, leading to increased energy consumption due to inefficient operation of electrochemical cells, as the release state of carbon dioxide is difficult to observe with sensors.
Innovation Solution
A carbon dioxide recovery system that includes an electrochemical cell with a working electrode and counter electrode, a sensor to detect recovery amounts, and a control device that applies potentials only during optimal adsorption and desorption times based on stored data to manage energy usage effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electrochemical cell is energized for a long time to ensure complete desorption of carbon dioxide, then the desorption completeness is improved, but the energy consumption increases
Solution Approach 1:
The system uses a sensor to detect the recovery amount of carbon dioxide and feeds this information back to the control device. The control device then adjusts the desorption time based on the detected recovery amount, creating a closed-loop control system that optimizes energy consumption while ensuring complete desorption.
Solution Approach 2:
The desorption time is made dynamic rather than fixed. The control device adjusts the desorption time based on real-time detection of carbon dioxide recovery amount, allowing the system to adapt to varying conditions and minimize energy consumption while maintaining desorption effectiveness.
2Quantity of substance
If the desorption time is extended to maximize carbon dioxide recovery, then the recovery amount is improved, but the time consumption increases
Solution Approach 1:
The sensor provides real-time feedback on the recovery amount, allowing the control device to determine when desorption is complete. This eliminates unnecessary extended desorption time while maximizing recovery amount through precise timing.
Solution Approach 2:
The system uses the sensor detection to automatically determine when desorption is complete, making the system self-regulating. The desorption process stops when the recovery amount reaches the optimal level, eliminating the need for manual timing or excessive desorption duration.
3Use of energy by moving object
If the application time of potential is optimized based on detection data, then the energy consumption is reduced, but the system complexity increases
Solution Approach 1:
The control device receives detection data from the sensor and uses this feedback to optimize the potential application time. This closed-loop control reduces energy consumption by applying potential only for the necessary duration based on actual recovery conditions.
Solution Approach 2:
The system stores desorption amount change data in advance, which provides a reference for determining optimal desorption time. This preliminary data preparation simplifies the real-time control process while maintaining energy efficiency.
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 optimizes energy consumption by applying potentials only during necessary times, thereby reducing the energy required for desorption and improving the overall efficiency of carbon dioxide recovery.
Implementation Method 1
a working electrode, and a counter electrode paired with the working electrode, wherein the working electrode contains an adsorbent capable of adsorbing carbon dioxide
Implementation Method 2
recovering carbon dioxide from a mixed gas containing carbon dioxide by an electrochemical reaction
Data Source
AI summary
In an adsorption mode, a control device applies an adsorption potential between a working electrode and a counter electrode only during an adsorption time. The adsorption time corresponds to a target carbon dioxide adsorption amount, which an adsorbent can adsorb. In a desorption mode, the control device applies a desorption potential only during a recovery time corresponding to a recovery amount. At this time, the control device acquires an optimum desorption time which is a desorption time associated with a carbon dioxide desorption amount equivalent to a target carbon dioxide recovery amount RVCO2 in a desorption amount change map data. Then, the control device applies the desorption potential only during the optimum desorption time in the desorption mode.