Solid Resin CO2 Absorbent for Energy-Efficient Recovery
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Solution Overview
Problem
Current carbon dioxide capture and storage technologies require significant energy for CO2 recovery and suffer from efficiency losses due to amine degradation, leading to high operational costs and equipment corrosion.
Innovation Solution
A solid carbon dioxide absorbent comprising a resin compound with a polyvinyl halide and polyamine structure, which reduces energy consumption during desorption and enhances durability and CO2 absorption/release efficiency, while being resistant to oxidation and aqueous solutions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If an aqueous solution of alkanolamine is used as an absorbent liquid, then carbon dioxide absorption capacity is improved, but device corrosion occurs due to amine degradation products
Solution Approach 1:
The patent uses a porous polymer bead as a solid support matrix to carry the amine functional groups. This porous structure provides high surface area for CO2 absorption while the solid polymer matrix protects the amine groups from degradation and corrosion, eliminating the need for expensive corrosion-resistant steel equipment.
Solution Approach 2:
The invention creates a composite material by combining a polymer bead (polystyrene, polyacrylonitrile, or polyacrylic acid) with amine functional groups. This composite structure integrates the advantages of both materials: the polymer provides structural stability and corrosion resistance, while the amine groups provide CO2 absorption capacity.
2Productivity
If the desorption temperature is increased to improve carbon dioxide desorption performance, then CO2 recovery efficiency is improved, but amine degradation is accelerated
Solution Approach 1:
The patent changes the physical state parameter from liquid to solid, and modifies the chemical environment by attaching amine groups to a polymer matrix. This allows CO2 desorption at lower temperatures (50-150°C) compared to conventional liquid amine systems, maintaining amine stability while achieving efficient CO2 recovery.
3Quantity of substance
If a liquid absorbent system is used, then CO2 absorption capacity is improved, but large amount of energy is required for heating and CO2 release
Solution Approach 1:
The invention utilizes the phase transition from liquid to solid form of the amine-containing absorbent. The solid porous polymer bead with amine groups enables CO2 absorption and release with significantly reduced energy input compared to liquid systems, as the solid structure maintains absorbent integrity at lower temperatures and eliminates the need to heat large volumes of water.
4Productivity
If amine aqueous solution is used for long-term operation, then initial CO2 absorption efficiency is high, but efficiency reduces due to generation of degradation products
Solution Approach 1:
The patent employs a solid porous polymer bead with attached amine groups that is resistant to degradation. This solid support structure prevents the formation of degradation products that plagues liquid amine systems, allowing for long-term continuous operation without the need to periodically replace the absorbent.
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 solid resin compound achieves efficient and energy-saving CO2 recovery with improved durability and reduced energy requirements, maintaining performance even under elevated temperatures.
Implementation Method 1
a solid resin compound having a polyvinyl halide structure and a polyamine structure... efficient and energy-saving CO2 recovery
Implementation Method 2
reduces energy consumption during desorption... maintaining performance even under elevated temperatures
Data Source
AI summary
A carbon dioxide absorbent of an embodiment includes a solid resin compound containing a structural unit expressed by the following formula (1). X in the formula (1) is a halogen element.