Non-Aqueous Amine Dispersion for Lower-Energy Carbon Capture
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Solution Overview
Problem
Existing carbon capture and storage (CCS) methods using aqueous amine solutions require significant energy input due to high water volatility and specific heat capacity, leading to energy inefficiencies and corrosion issues.
Innovation Solution
A non-aqueous solvent system comprising an amine dispersed in a base oil stabilized with a surfactant, formed from the reaction product of polyolefin succinic acid/anhydride and an organic amine, reduces energy consumption by minimizing volatile solvent and amine losses, allowing higher temperature operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If aqueous amine solutions are used for carbon capture, then CO2 absorption efficiency is improved, but energy consumption increases due to high water volatility and specific heat capacity
Solution Approach 1:
The patent changes the fundamental parameter of the solvent system from aqueous (water-based) to non-aqueous (oil-based). This substitution fundamentally alters the thermal properties of the system, replacing water's high specific heat capacity and volatility with oil's lower values, thereby reducing the energy required for heating and regeneration processes while maintaining CO2 absorption capability through the amine component.
Solution Approach 2:
The invention creates a composite solvent system combining three components: base oil (for low volatility and heat capacity), amine (for CO2 absorption chemistry), and surfactant (for stabilization). This composite approach allows the system to achieve both efficient CO2 capture (from amine) and reduced energy consumption (from oil), resolving the contradiction between absorption efficiency and energy use.
2Productivity
If aqueous amine solutions are used for carbon capture, then CO2 separation is achieved, but corrosion issues arise
Solution Approach 1:
The patent changes the chemical environment from aqueous to non-aqueous by replacing water with base oil as the solvent medium. This parameter change eliminates the corrosive effects associated with water, humidity, and aqueous chemistry while preserving the CO2 separation function through the amine component's chemical reactivity with CO2.
3Productivity
If higher temperature is used for CO2 liberation, then CO2 release efficiency is improved, but solvent volatility losses increase
Solution Approach 1:
The patent changes the physical parameter of solvent volatility by substituting water with base oil. Oil has significantly lower vapor pressure and volatility compared to water, allowing the system to operate at higher temperatures for CO2 liberation without suffering from excessive solvent evaporation losses, thus improving CO2 release efficiency while minimizing substance loss.
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 system achieves efficient carbon dioxide separation with reduced energy requirements, improved stability, and extended service life of the amine, addressing the inefficiencies of traditional aqueous amine systems.
Implementation Method 1
CO2-containing gas streams are contacted with the absorbent where the CO2 reacts with the amine to produce carbamate, carbonate and bicarbonate species, thereby trapping the CO2 by chemical means
Implementation Method 2
A non-aqueous solvent system comprising an amine dispersed in a base oil stabilized with a surfactant
Implementation Method 3
The ammonium salts that form are thermally unstable so in a secondary stage, it is possible to liberate the captured CO2 by heating and thus regenerate the liquid amine absorbent
Data Source
Figure 1
Figure 2~3
AI summary
Methods, processes, compositions, systems and uses for separating acidic gases such as carbon dioxide from a gaseous mixture containing such acidic gases, utilising a dispersion of at least one organic base comprising at least two aminic functional groups and a base oil, the dispersion further comprising at least one surfactant being the reaction product of a polyolefin succinic acid and/or polyolefin succinic anhydride with an organic amine comprising at least two aminic functional groups.