Fluorinated Polymer Composite Adsorbent for CO2 Capture
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Solution Overview
Problem
Current gas separation technologies by adsorption methods face challenges in efficiently capturing carbon dioxide from fluid or gas streams, particularly in industrial applications like fossil fuel power plants, due to limitations in adsorbent materials and their stability during regeneration.
Innovation Solution
Compositions comprising a fluorinated polymer with recurring units derived from vinylidene fluoride monomers and functional groups, combined with microporous adsorbent carbon materials, are used to enhance gas separation and purification through adsorption methods, providing improved mechanical properties, thermal resistance, and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If adsorbent materials are used for gas separation, then carbon dioxide capture efficiency is improved, but stability during regeneration deteriorates
Solution Approach 1:
The patent uses composite materials consisting of fluorinated polymer particles combined with adsorbent materials (activated carbon, zeolites, or metal organic frameworks). The fluorinated polymer matrix provides structural stability and mechanical strength during regeneration cycles, while the embedded adsorbent particles maintain high CO2 capture efficiency. This composite structure resolves the contradiction by combining materials with complementary properties.
Solution Approach 2:
The patent employs porous fluorinated polymer particles with controlled pore structures that can accommodate adsorbent materials within their matrix. The porous structure allows fluid penetration and maintains accessibility of CO2 to active adsorption sites while providing mechanical integrity. The pore size and distribution are optimized to balance adsorption capacity with structural stability during thermal or pressure swing regeneration.
2Quantity of substance
If adsorbent material is provided on a support, then adsorption capacity is improved, but mechanical stability deteriorates
Solution Approach 1:
The fluorinated polymer particles themselves serve as self-supporting composite structures, eliminating the need for separate support substrates. The polymer matrix is engineered to provide adequate mechanical strength while hosting the adsorbent material within its porous network. This integrated composite approach maintains high adsorption capacity through increased adsorbent loading while preserving mechanical stability through the polymer's structural properties.
Solution Approach 2:
The patent creates local variations in properties within the particle structure, with the fluorinated polymer providing mechanical strength in regions where stress concentrates, while adsorbent-rich zones provide high adsorption capacity. The composite structure allows different regions of the particle to have optimized local compositions, balancing mechanical integrity with adsorption performance throughout the material.
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 described compositions demonstrate enhanced adsorption capacity and stability, enabling effective separation and purification of carbon dioxide from gas mixtures, suitable for both temperature swing and pressure swing adsorption processes, with improved mechanical and thermal properties.
Implementation Method 1
Gas separation by adsorption basically relies on the preferential adsorption of one component of a fluid mixture on an insoluble material to separate this component from the remaining components of the fluid mixture
Implementation Method 2
Compositions comprising a fluorinated polymer with recurring units derived from vinylidene fluoride monomers and functional groups, combined with microporous adsorbent carbon materials, are used to enhance gas separation and purification through adsorption methods, providing improved mechanical properties, thermal resistance, and stability
Data Source
AI summary
Composition comprising a) a polymer comprising recurring units derived from vinylidene fluoride monomer and at least one monomer carrying at least one functional group selected from carboxyl groups, ester groups and hydroxyl groups, and b) a microporous adsorbent carbon material having a specific surface area (BET) of at least 700 m2/g, a pore volume in the range of from 0.1 to 0.7 m3/g, at least 60% of said pore volume being formed by micropores having a pore radius of 2 nm or less.