Cyclic Disulfide Adsorbent for Low-Energy CO2 Capture
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Solution Overview
Problem
Current carbon dioxide capture and storage methods require high heating temperatures for regeneration, leading to significant energy consumption, and existing alternatives either require additional energy-intensive gas separation steps or are inefficient in carbon dioxide release.
Innovation Solution
A carbon dioxide adsorbent with cyclic disulfide structures that utilizes electrochemical processes to efficiently adsorb and desorb carbon dioxide by switching between reduction and oxidation states, allowing for low-energy carbon dioxide capture and release at room temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If thermal heating is used for carbon dioxide desorption from absorbent, then carbon dioxide can be effectively released, but high energy consumption occurs due to heating temperature of about 140°C
Solution Approach 1:
The patent replaces the thermal field (heating) with an electrical field to induce redox reactions in the cyclic disulfide structure. By applying electrical potential, the disulfide bonds are reduced to sulfide bonds, which triggers CO2 desorption without requiring thermal heating, thereby eliminating the high energy consumption associated with heating to 140°C while maintaining effective CO2 release.
Solution Approach 2:
The patent changes the operational parameter from temperature control to electrical potential control. Instead of varying temperature to achieve desorption, the system uses electrical potential to switch between oxidation and reduction states of the cyclic disulfide structure, enabling precise control of CO2 adsorption and desorption at lower energy input.
2Temperature
If water vapor substitution method is used for carbon dioxide desorption, then heating temperature can be lowered to 100°C or lower, but water vapor is contained in the released gas requiring additional cooling and condensation steps
Solution Approach 1:
The patent replaces the water vapor substitution method with an electrical field-induced redox method. Instead of introducing water vapor to displace CO2 and then requiring cooling and condensation equipment, the system uses electrical potential to directly induce CO2 desorption through redox reactions, eliminating the need for additional cooling and condensation steps while maintaining low temperature operation.
Solution Approach 2:
The patent extracts and eliminates the unnecessary water vapor introduction and condensation steps from the process. By using electrical potential to directly drive CO2 desorption, the system removes the harmful factor of water vapor contamination and the associated complex equipment, achieving a simplified process.
3Quantity of substance
If cyclic disulfide structure undergoes bond cleavage for carbon dioxide adsorption, then carbon dioxide can be adsorbed, but ease of recombination affects reaction efficiency
Solution Approach 1:
The patent employs periodic switching between oxidation and reduction states through alternating electrical potential application. The cyclic disulfide structure undergoes periodic bond cleavage (during reduction) and recombination (during oxidation), creating a reversible cycle that maintains high reaction efficiency. This periodic action allows the system to repeatedly adsorb and desorb CO2 without degradation.
Solution Approach 2:
The patent introduces dynamic control through electrical potential switching, allowing the cyclic disulfide structure to dynamically transition between bonded and cleaved states. This dynamic control optimizes the balance between bond cleavage for CO2 adsorption and recombination for CO2 release, maintaining high reaction efficiency throughout the cycle.
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 adsorbent enables efficient carbon dioxide capture and release with reduced energy consumption, making it suitable for large-scale carbon dioxide recovery applications while maintaining stability in the presence of oxygen.
Implementation Method 1
the cyclic disulfide structure undergoes an oxidation-reduction reaction by electrical response, thereby adsorbing carbon dioxide and desorbing the carbon dioxide
Implementation Method 2
the cyclic disulfide structure undergoes an oxidation-reduction reaction by electrical response
Implementation Method 3
A carbon dioxide adsorbent with cyclic disulfide structures that utilizes electrochemical processes to efficiently adsorb and desorb carbon dioxide
Data Source
AI summary
According to one embodiment, a carbon dioxide adsorbent is provided. The carbon dioxide adsorbent is capable of adsorbing and desorbing carbon dioxide and includes one or more cyclic disulfide structures.