Electrochemical CO2 Recovery Control Using Adaptive Adsorption Timing
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Solution Overview
Problem
Existing carbon dioxide recovery systems using electrochemical cells face challenges in accurately controlling the application time period of adsorption potential due to uncertain adsorption characteristics, leading to potential energy inefficiencies and suboptimal recovery performance.
Innovation Solution
A carbon dioxide recovery system that includes a controller to manage an adsorption mode and recovery mode by applying potentials between electrodes, utilizing adsorption-amount change data to determine optimal time periods for adsorption and desorption based on detected recovery amounts, thereby enhancing control over the adsorption process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the adsorption potential is applied for a fixed time period, then the control is simple, but the energy efficiency deteriorates due to uncertain adsorption characteristics
Solution Approach 1:
The patent implements dynamic adjustment of the adsorption time period based on real-time detection of recovery amount. The controller modifies the adsorption time period dynamically according to the detected recovery amount, transitioning from a fixed time control to a variable time control that adapts to actual adsorption characteristics, thereby resolving the contradiction between control simplicity and energy efficiency.
Solution Approach 2:
The patent introduces a feedback mechanism where the sensor detects the recovery amount and feeds this information back to the controller. The controller then adjusts the adsorption time period based on this feedback, creating a closed-loop control system that optimizes energy efficiency while maintaining operational simplicity through automated adjustment.
2Reliability
If the adsorption time period is extended to ensure sufficient adsorption, then the recovery performance improves, but the energy consumption increases
Solution Approach 1:
The patent applies partial action by adjusting the adsorption time period to be just sufficient for the detected recovery amount rather than always using a fixed extended time period. This avoids excessive adsorption time and associated energy consumption while ensuring adequate recovery performance based on actual conditions.
Solution Approach 2:
The patent changes the time parameter dynamically based on detected recovery amount. By adjusting the adsorption time period parameter according to actual recovery conditions, the system achieves optimal balance between recovery performance and energy consumption, avoiding both insufficient adsorption and excessive energy use.
3Measurement precision
If multiple adsorption-amount change data are stored for different target adsorption amounts, then the control precision improves, but the device complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-storing multiple adsorption-amount change data corresponding to different target adsorption amounts. This preparation allows the controller to quickly select appropriate control parameters without complex real-time calculations, achieving high control precision while keeping the data storage structure simple and organized.
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 effectively controls the adsorption and desorption processes to optimize energy use and recovery efficiency, minimizing energy waste by dynamically adjusting operation times based on real-time recovery data.
Implementation Method 1
a gas separation system that separates carbon dioxide from a mixed gas containing carbon dioxide by an electrochemical reaction
Implementation Method 2
a working electrode having an adsorbent capable of adsorbing carbon dioxide
Implementation Method 3
the controller applies a second potential between the working electrode and the counter electrode only for a recovery time period in the recovery mode such that the carbon dioxide adsorbed by the adsorbent is desorbed
Data Source
AI summary
In a carbon dioxide recovery system. an electrochemical cell of a recovery device includes a working electrode having an adsorbent capable of adsorbing carbon dioxide, and a counter electrode. A sensor detects a recovery amount of carbon dioxide recovered and sent to a carbon dioxide recovery tank. A controller applies a first potential between the electrodes only for a time period in an adsorption mode. The time period corresponds to a target amount of carbon dioxide that can be adsorbed by the adsorbent. A storage unit stores multiple adsorption-amount change data indicating association between the target amount and the time period. The controller acquires the target amount correlated with the detected recovery amount, acquires the time period by using the acquired target amount, and selects data from among the multiple adsorption-amount change data according to the recovery amount as in-use data for acquisition of the time period.