Temperature-Responsive Electrolyte for Ion Gradient Generation
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Solution Overview
Problem
Current methods for recovering energy from waste heat and separating carbon dioxide from discharge gases are inefficient, with existing technologies failing to effectively utilize small temperature differences and requiring high temperatures for carbon dioxide separation, leading to energy inefficiencies and waste heat disposal.
Innovation Solution
A system and method utilizing a temperature-responsive electrolyte that converts temperature gradients into ion concentration gradients, enabling efficient recovery of acid gases like carbon dioxide by altering the ionization state of the electrolyte in response to temperature changes, allowing for repeated adsorption and release of carbon dioxide.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a chemical absorption method using an aqueous solution of a low-molecular weight amine is used to separate carbon dioxide, then carbon dioxide can be absorbed, but the absorbed carbon dioxide requires extremely high temperature heating for separation, resulting in poor energy efficiency
Solution Approach 1:
The patent applies parameter changes by utilizing temperature-responsive polymers whose pKa values change with temperature. This allows the absorption and release of carbon dioxide to occur at moderate temperature differences rather than requiring extremely high temperatures, thereby improving energy efficiency while maintaining absorption capacity
Solution Approach 2:
The patent employs composite materials by combining temperature-responsive polymers with amine groups that have carbon dioxide absorption capabilities. This composite structure enables the material to respond to temperature changes while effectively absorbing and releasing carbon dioxide at lower energy costs
2Loss of energy
If waste heat is discarded into the environment without utilization, then no energy recovery is achieved, but utilizing small temperature differences requires advanced techniques that do not yet exist
Solution Approach 1:
The patent utilizes phase transitions of temperature-responsive polymers, which undergo conformational changes at specific temperatures. This enables the system to convert even small temperature differences into useful chemical energy for waste heat recovery, making previously unavailable temperature ranges exploitable
Solution Approach 2:
The patent introduces temperature-responsive polymers as intermediaries that mediate between waste heat and useful energy. These polymers act as a bridge that converts thermal energy from small temperature differences into chemical energy through pH changes, enabling waste heat utilization without requiring advanced direct conversion techniques
3Quantity of substance
If a temperature gradient is applied to a temperature-responsive electrolyte, then an ion concentration gradient can be produced, but this requires a specific temperature-responsive material with appropriate pKa temperature dependence
Solution Approach 1:
The patent applies parameter changes by selecting temperature-responsive polymers with specific pKa temperature dependence characteristics. By adjusting the polymer structure and composition, the system can be tuned to respond to specific temperature gradients, enabling ion concentration gradient production while managing material complexity through deliberate parameter selection
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 enables the efficient production of ion concentration gradients, enhancing energy recovery and carbon dioxide capture by leveraging temperature-induced changes in the electrolyte's ionization state, improving energy efficiency and reducing waste heat disposal.
Implementation Method 1
a temperature-responsive electrolyte material that has a functional group capable of releasing an ion in an aqueous solution and that shows a temperature responsiveness in which the molecule satisfactorily dissolves or disperses in water at low temperatures but, upon heating to a certain temperature or higher, the molecule gathers, shrinks, aggregates, gelates, or precipitates due to hydrophobic interaction
Implementation Method 2
the molecule satisfactorily dissolves or disperses in water at low temperatures but, upon heating to or a certain temperature or higher, the molecule gathers, shrinks, aggregates, gelates, or precipitates due to hydrophobic interaction
Data Source
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AI summary
A system for producing an ion concentration gradient and a temperature-responsive electrolyte material which are utilizable, for example, for efficiently converting heat energy that has been discarded into reusable energy or for efficiently recovering an acid gas, such as carbon dioxide is provided. A temperature-responsive electrolyte is used to produce an ion concentration gradient by means of a temperature gradient. The temperature-responsive electrolyte is used in the state of an aqueous solution and also in the state of a solid phase.