Spiro Ammonium Hydroxide Absorbent Without Layer Separation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing carbon dioxide absorbents face issues such as layer separation, increased viscosity, and reduced efficiency due to the use of anions like phenolate and carbamate formation, leading to instability and high temperature requirements for desorption.
Innovation Solution
A carbon dioxide absorbent containing a spiro ammonium cation and hydroxide anion, which is water-soluble, preventing layer separation and maintaining low viscosity, enabling efficient absorption and desorption at moderate temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional anions like phenolate or carbamate are used in carbon dioxide absorbents, then carbon dioxide absorption capacity is improved, but layer separation and increased viscosity occur leading to reduced stability
Solution Approach 1:
The patent changes the chemical parameters of the absorbent by replacing conventional anions (phenolate, carbamate) with hydroxide anions in a specific concentration range (0.1-5.0 M). This parameter change maintains high CO2 absorption capacity while preventing layer separation and viscosity increase, thereby resolving the stability issue without sacrificing absorption performance
Solution Approach 2:
The patent creates a composite ionic material system combining specific cations (ammonium, alkylammonium, arylammonium) with hydroxide anions. This composite approach allows optimization of both absorption capacity and stability by selecting appropriate cation-anion combinations, preventing the layer separation problem that occurs with conventional single-component absorbents
2Quantity of substance
If conventional absorbents are used to capture carbon dioxide, then absorption capacity is achieved, but high temperature requirements for desorption increase energy consumption
Solution Approach 1:
The patent changes the thermal parameters of the absorption-desorption cycle by using hydroxide anions that enable desorption at lower temperatures (50-150°C) compared to conventional absorbents requiring higher temperatures. This parameter change reduces the energy input needed for desorption while maintaining effective CO2 capture capacity
Solution Approach 2:
The patent converts the typically harmful effect of strong base-catalyzed side reactions into a benefit by utilizing the hydroxide anion's reactivity to form readily reversible carbonate/bicarbonate species. This allows efficient CO2 capture followed by easy thermal decomposition at moderate temperatures, turning what would be a stability problem into an advantage for low-energy desorption
3Productivity
If additional solvents are added to improve absorbent performance, then absorption efficiency is enhanced, but operational costs and system complexity increase
Solution Approach 1:
The patent extracts and eliminates the need for additional organic solvents or co-absorbents by using aqueous solutions of ionic materials as the primary absorbent system. This extraction of unnecessary components simplifies the system while maintaining high absorption efficiency through the optimized ionic material composition
Solution Approach 2:
The patent makes the aqueous ionic material solution perform multiple functions simultaneously: CO2 absorption, solvent action, and stability maintenance. This multi-functionality eliminates the need for separate additional solvents or additives, reducing system complexity while preserving absorption efficiency
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 absorbent effectively captures carbon dioxide with high capacity and efficiency, reducing the need for additional solvents and lowering operational costs by minimizing viscosity increases and layer separation, thus enhancing the continuous carbon dioxide separation process.
Implementation Method 1
a carbon dioxide absorbent which contains an ionic material containing a spiro ammonium cation and a hydroxide anion
Implementation Method 2
desorbing the absorbed carbon dioxide attached to the carbon dioxide absorbent
Data Source
AI summary
The embodiments of the present disclosure relate to a carbon dioxide absorbent containing an ionic material containing a spiro ammonium cation and a hydroxide anion. The carbon dioxide absorbent according to an embodiment contains a hydroxide anion having a small molecular weight and high basicity, such that absorption performance per unit volume of the absorbent may be effectively improved. Further, the carbon dioxide absorbent according to an embodiment is soluble in water and thus may not cause layer separation problems.