Ionic Liquid Electrolyte for CO2 Recovery Cell
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Solution Overview
Problem
Existing carbon dioxide recovery systems using electrochemical reactions face adverse influences due to redox reactions between the electrolytic substance and carbon dioxide contained gases or electrode materials, leading to performance deterioration and volatile product generation.
Innovation Solution
The system employs an electrochemical cell with a working electrode and counter electrode, where the electrolytic substance has resistance to redox reactions with carbon dioxide contained gas, the working electrode, and the counter electrode, preventing adverse reactions by using an ionic liquid as the electrolytic substance that does not participate in redox or decomposition reactions within the specified voltage range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional electrolytic substances are used in the electrochemical cell, then the system can operate with standard electrolytes, but redox reactions occur between the electrolytic substance and carbon dioxide contained gas or electrode materials, leading to performance deterioration and volatile product generation
Solution Approach 1:
The patent changes the chemical composition parameters of the electrolytic substance by using an ionic liquid with specific functional groups (such as imidazolium, pyridinium, or ammonium cations combined with various anions) that have resistance to redox reactions with carbon dioxide and electrode materials, thereby preventing performance deterioration while maintaining ease of manufacture
Solution Approach 2:
The patent employs composite ionic liquid electrolytes that combine multiple cation and anion types to create an electrolytic substance with enhanced stability and resistance to redox reactions, achieving both reliability improvement and manufacturability through established ionic liquid synthesis methods
2Productivity
If conventional electrolytic substances are used in the electrochemical cell, then the system can function with standard electrolytes, but volatile products are generated due to redox reactions, reducing the purity of recovered carbon dioxide
Solution Approach 1:
The patent modifies the chemical parameters of the electrolytic substance by selecting ionic liquids with appropriate redox potentials and chemical stability that prevent volatile product formation during carbon dioxide recovery operations, thereby improving manufacturing precision while maintaining productivity
Solution Approach 2:
The patent creates a chemically inert environment within the electrochemical cell by using ionic liquids that do not participate in redox reactions with carbon dioxide or electrode materials, effectively eliminating volatile product generation and improving the purity of recovered carbon dioxide
3Ease of operation
If conventional electrolytic substances are used in the electrochemical cell, then the system can operate with standard electrolytes, but energy efficiency is reduced due to adverse redox reactions
Solution Approach 1:
The patent optimizes the electrochemical parameters of the electrolytic substance by using ionic liquids with appropriate ionic conductivity, viscosity, and electrochemical stability that minimize energy loss from parasitic redox reactions while maintaining ease of operation through pumpable fluid properties
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 approach prevents the generation of volatile products, maintains carbon dioxide recovery efficiency, and improves the purity of recovered carbon dioxide, reducing adverse influences on the system and enhancing energy efficiency.
Implementation Method 1
The carbon dioxide adsorbent is configured to adsorb carbon dioxide in accordance with supply of electrons from the counter electrode to the working electrode in response to application of voltage between the working electrode and the counter electrode
Implementation Method 2
An electrolytic substance is provided between the working electrode and the counter electrode. The electrolytic substance has resistance to a redox reaction with at least one of the carbon dioxide contained gas, the working electrode, or the counter electrode when a voltage is applied between the working electrode and the counter electrode
Data Source
AI summary
A carbon dioxide recovery system separates carbon dioxide from a carbon dioxide contained gas that contains carbon dioxide by an electrochemical reaction. The carbon dioxide recovery system includes an electrochemical cell including a working electrode and a counter electrode, the working electrode including a carbon dioxide adsorbent. When a voltage is applied between the working electrode and the counter electrode, electrons are supplied from the counter electrode to the working electrode, and the carbon dioxide adsorbent adsorbs carbon dioxide as the electrons are supplied. An electrolytic substance is provided between the working electrode and the counter electrode. The electrolytic substance is a substance having resistance to a redox reaction with at least one of the carbon dioxide contained gas, the working electrode, or the counter electrode when a voltage is applied between the working electrode and the counter electrode.