Functionalized Ion Exchange Membrane for Ambient CO2 Capture
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Solution Overview
Problem
Existing methods for capturing CO2 from air require high energy due to the need for compressing air to high pressures, leading to inefficient CO2 capture and potential reintroduction of CO2 into the atmosphere as a byproduct of the energy used.
Innovation Solution
Development of alternative solid ion exchange materials immobilized in or on a support matrix, such as porous membranes, to enhance CO2 capture efficiency while reducing energy consumption by optimizing the structure and porosity of the sorbent materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If air is compressed to high pressures for CO2 capture, then CO2 removal efficiency is improved, but energy consumption increases significantly
Solution Approach 1:
The patent employs porous ion exchange membranes as the core sorbent material. The porous structure provides high surface area and ion exchange capacity for CO2 capture, while the membrane format enables operation at ambient pressure, eliminating the need for energy-intensive air compression while maintaining effective CO2 removal
Solution Approach 2:
The patent replaces the mechanical compression system with a chemical absorption system using ion exchange membranes. Instead of using mechanical force to pressurize air for CO2 capture, the system uses chemical affinity of the ion exchange material for CO2, allowing efficient capture at ambient pressure and eliminating the energy consumption associated with compression
2Productivity
If high pressure compression is used for CO2 capture, then CO2 capture efficiency is improved, but harmful CO2 reintroduction increases
Solution Approach 1:
The patent substitutes mechanical compression with chemical absorption processes that operate at ambient pressure. This eliminates the energy consumption and associated harmful effects of CO2 reintroduction that result from using electricity generated by fossil fuel combustion to power compression systems
Solution Approach 2:
The ion exchange membrane system performs CO2 capture autonomously at ambient conditions without requiring external energy input for compression. The membrane naturally absorbs CO2 from air through its ion exchange properties, making the process self-sustaining and eliminating the harmful byproducts of energy-intensive compression
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 sorbent materials demonstrate comparable or improved CO2 absorption capacity to existing technologies with reduced energy requirements, minimizing the reintroduction of CO2 and achieving more effective carbon capture.
Implementation Method 1
functionalized ion exchange membrane for capturing ambient CO2
Data Source
AI summary
Disclosed is a process for forming a CO2 capture element comprises providing a mixture of a monomer or monomer blend or a polymer binder, a miscible liquid carrier for the binder and a CO2 sorbent or getter in particle form, forming the mixture into a wet film or membrane, evaporating the liquid carrier to form a film or membrane, and treating the wet film or membrane to form pores in the body of the film or membrane. Also disclosed is a process of forming a CO2 capture element which comprises the steps of applying a mixture including a sorbent material and a polymer to an underlying material; polymerizing the mixture in place on the material; and aminating the polymer-coated material.