Electrochemical Device with Ionic Liquid Membrane for CO2 Separation
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Solution Overview
Problem
Conventional electrochemical reaction devices face challenges in efficiently separating and purifying carbon dioxide from exhaust gases, requiring high-temperature separation methods and complex systems, which increase costs and system complexity.
Innovation Solution
The electrochemical reaction device incorporates a flow path structure with a porous film permeated with ionic liquid, allowing for efficient separation and purification of carbon dioxide at room temperature, using a Supported Ionic Liquid Membrane (SILM) to enhance carbon dioxide absorption and separation, and a cross-flow configuration to concentrate and reuse carbon dioxide.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional high-temperature separation methods are used to purify carbon dioxide, then carbon dioxide separation efficiency is improved, but energy consumption and system complexity increase
Solution Approach 1:
The invention changes the operating temperature parameter from high-temperature conventional methods to room temperature operation. The porous film containing ionic liquid enables carbon dioxide separation at room temperature, fundamentally altering the thermal parameter of the separation process to reduce energy consumption while maintaining separation efficiency
Solution Approach 2:
The invention introduces an ionic liquid as an intermediary substance within the porous film structure. This ionic liquid acts as a mediator that selectively absorbs carbon dioxide from the exhaust gas at room temperature, enabling efficient separation without requiring high-temperature energy input
2Measurement precision
If conventional separation systems are used to purify carbon dioxide, then carbon dioxide purification is achieved, but system complexity and costs increase
Solution Approach 1:
The invention employs a porous film structure as the core separation component. This porous material provides a large surface area and controlled pore structure that facilitates carbon dioxide separation through the ionic liquid, achieving high purification in a single integrated component rather than complex multi-stage systems
Solution Approach 2:
The invention uses a thin porous film structure containing ionic liquid as the separation medium. This thin-film approach reduces the overall system complexity and size compared to conventional bulk separation systems, while maintaining effective carbon dioxide purification through the film's selective permeability properties
3Productivity
If conventional electrochemical reaction devices are used, then carbon dioxide reduction is achieved, but carbon dioxide separation and purification efficiency is insufficient
Solution Approach 1:
The invention merges the carbon dioxide separation function with the electrochemical reduction function into a single integrated device. The porous film with ionic liquid for separation is combined with the electrochemical reaction cell, allowing simultaneous separation and reduction processes to occur efficiently in one system
Solution Approach 2:
The invention implements preliminary separation of carbon dioxide from exhaust gas using the ionic liquid-containing porous film before the electrochemical reduction step. This preliminary action ensures that the reduction process receives purified carbon dioxide, enhancing the overall efficiency and productivity of carbon compound generation
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 increases the purity of carbon dioxide, reduces system complexity, and lowers costs by enabling efficient carbon dioxide separation and purification at room temperature, improving the overall efficiency and effectiveness of the carbon capture process.
Implementation Method 1
a porous film separating a first space and a second space inside the flow path and being permeated with an ionic liquid, the ionic liquid being configured to separate the carbon dioxide from the target gas
Implementation Method 2
a cathode unit to reduce carbon dioxide and thus generate a carbon compound and hydrogen
Implementation Method 3
an anode unit to oxidize water and thus generate oxygen
Implementation Method 4
a separator separating the anode and cathode units
Data Source
AI summary
An electrochemical reaction device comprises: an anode unit to oxidize water and thus generate oxygen; a cathode unit to reduce carbon dioxide and thus generate a carbon compound and hydrogen; a separator separating the anode and cathode units; and a power supply connected to the anode and cathode units, the cathode unit including: a porous member having a first surface and a second surface; a flow path plate facing the first surface; and a reduction catalyst on the second surface, and the flow path plate including: a flow path through which a target gas containing the carbon dioxide flows; and a porous film separating a first space and a second space inside the flow path and being permeated with an ionic liquid, the ionic liquid being configured to separate the carbon dioxide from the target gas.