Electrochemical CO2 Reduction to Formate Salt
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Solution Overview
Problem
The increasing concentration of atmospheric CO2 due to industrial activities poses a significant threat to global warming, and existing carbon capture and storage technologies are inefficient and risky, prompting the need for innovative methods to convert CO2 into valuable products without storage.
Innovation Solution
An electrochemical reduction method and device that utilize an anode and cathode units with continuous supply of metal hydroxide and CO2, applying voltage or current to produce high-concentration formate salt, maintaining pH and voltage balance through continuous metal hydroxide addition, and using specific electrolytes like K2SO4 to achieve stable and efficient conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If carbon capture and storage (CCS) technology is used to remove atmospheric CO2, then CO2 can be captured and stored, but it requires wide storage space and poses safety risks from storing large amounts of CO2 in one place
Solution Approach 1:
The patent converts the harmful CO2 gas into a beneficial liquid product (formate salt solution) through electrochemical reduction. Instead of storing CO2 as a hazardous gas requiring large storage facilities, the system transforms it into a valuable chemical product, eliminating both storage space requirements and safety risks associated with CO2 storage.
Solution Approach 2:
The patent changes the physical and chemical parameters of CO2 by reducing it electrochemically to formate salt. This transformation changes CO2 from a gaseous waste product to a liquid chemical product with different properties, enabling direct utilization without storage infrastructure.
2Productivity
If conventional electrochemical conversion of CO2 is performed without continuous metal hydroxide supply, then the process is simpler, but pH imbalance occurs between anode and cathode units reducing conversion efficiency
Solution Approach 1:
The patent implements a feedback mechanism where pH sensors monitor the pH levels in both anode and cathode units, and this information feeds back to control the metal hydroxide supply rate. This closed-loop control automatically adjusts the metal hydroxide addition to maintain optimal pH balance, ensuring high conversion efficiency while managing system complexity through automated control.
Solution Approach 2:
The system uses automatic pH monitoring and control mechanisms that self-regulate the metal hydroxide supply based on real-time pH measurements, reducing the need for manual intervention and maintaining optimal conditions for formate salt production continuously.
3Duration of action of stationary object
If batch processing is used for CO2 conversion, then the process is easier to operate, but formate salt concentration decreases over time due to pH imbalance
Solution Approach 1:
The patent implements continuous processing with continuous supply of CO2, water, and metal hydroxide, along with continuous monitoring and adjustment of pH levels. This continuous operation maintains consistent formate salt concentration over extended periods, overcoming the limitations of batch processing where pH imbalance degrades performance over time.
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 method consumes less energy, produces a highly profitable and easily stored liquid product, and maintains high formate salt concentrations over time, addressing the inefficiencies of current CO2 conversion technologies while mitigating environmental concerns.
Implementation Method 1
applying voltage or current to the cathode unit and the anode unit for reducing the carbon dioxide to obtain a formate salt
Implementation Method 2
maintaining pH and voltage balance through continuous metal hydroxide addition
Data Source
AI summary
A method and a device for electrochemical reduction of carbon dioxide for preparing a high-concentration formate salt. Carbon dioxide is continuously supplied to a cathode unit and is continuously supplied to a metal hydroxide to the anode unit. A voltage or current is applied to the cathode unit and the anode unit for reducing the carbon dioxide to obtain the formate salt.