Heteroaromatic Ionic Liquids for Low-Viscosity CO2 Absorption
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Solution Overview
Problem
Current ionic liquids used for separating acidic gases, such as CO2, often become highly viscous upon absorption, making them unsuitable for industrial applications, and lack efficient methods for gas absorption and recovery.
Innovation Solution
Development of ionic liquids with specific anions like pyrrolide, pyrazolide, indolide, phospholide, or imidazolide, which maintain low viscosity and allow for effective absorption and recovery of acidic gases through controlled binding interactions, enabling efficient separation and recycling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional ionic liquids are used for absorbing acidic gases, then gas absorption capacity is improved, but viscosity increases significantly
Solution Approach 1:
The patent changes the chemical structure parameters of the ionic liquid anions, specifically using heteroaromatic anions (pyrrolide, pyrazolide, indolide, phospholide, imidazolide) which fundamentally alter the molecular interactions and reduce viscosity while maintaining gas absorption capacity
Solution Approach 2:
The patent creates composite ionic liquid systems by combining specific heteroaromatic anions with appropriate cations, resulting in a material that exhibits both high gas absorption capacity and low viscosity, resolving the contradiction between these two properties
2Productivity
If amine absorption technologies are used for CO2 separation, then separation efficiency is improved, but energy consumption increases by more than 30%
Solution Approach 1:
The patent changes the chemical nature of the absorbing medium from conventional amines to ionic liquids with heteroaromatic anions, which have different thermodynamic properties that enable efficient CO2 separation at lower energy costs, potentially reducing energy consumption below the 30% threshold
3Quantity of substance
If ionic liquids are designed for high gas absorption, then absorption capacity is improved, but gas removal and recycling become difficult
Solution Approach 1:
The patent modifies the chemical structure of the ionic liquid anions to achieve optimal binding strength with acidic gases, allowing for both high absorption capacity and easy reversibility through heat or pressure changes, facilitating gas removal and ionic liquid recycling
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 new ionic liquids effectively absorb and release acidic gases with minimal viscosity increase, optimizing gas separation processes and reducing energy consumption in industrial applications.
Implementation Method 1
providing sufficient contact between the mixture of gases and an ionic liquid described herein to allow at least a portion of the acidic gas to be absorbed by the ionic liquid
Implementation Method 2
anion represented by a Formula A: [Het··CO2]− wherein ·· represents a covalent or non-covalent bonding interaction
Implementation Method 3
anion represented by a Formula A: [Het··CO2]− wherein ·· represents a covalent or non-covalent bonding interaction
Implementation Method 4
recovering the acidic gas from the ionic liquid by applying at least one of heat or reduced pressure to the ionic liquid
Implementation Method 5
recovering the acidic gas from the ionic liquid by applying at least one of heat or reduced pressure to the ionic liquid
Implementation Method 6
recovering the acidic gas from the ionic liquid by applying at least one of heat or reduced pressure to the ionic liquid
Data Source
AI summary
Some embodiments described herein relate to ionic liquids comprising an anion of a heteraromatic compound such as optionally substituted pyrrolide, optionally substituted pyrazolide, optionally substituted indolide, optionally substituted phospholide, or optionally substituted imidazolide. Methods and devices for gas separation or gas absorption related to these ionic liquids are also described herein.