Sodium-Modified Zeolite for Direct Air Capture
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Solution Overview
Problem
Direct air capture technologies face challenges in commercialization and high costs due to their energy-intensive nature and limited scalability, necessitating the development of more efficient adsorbents for carbon dioxide capture from the atmosphere.
Innovation Solution
A zeolite with a surface modified through sodium ion exchange is used for carbon dioxide capture, involving a process that includes mixing zeolite with a supporting solution, heating for ion exchange, washing, drying, and calcining, which enhances CO2 adsorption and desorption performance by creating Lewis base sites and adjusting the Si/Al ratio for improved adsorption capacity and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional direct air capture technologies are used, then CO2 can be captured from the atmosphere, but the process is energy-intensive and costly
Solution Approach 1:
The patent modifies the zeolite surface by changing chemical parameters through sodium ion exchange, altering the Si/Al ratio and introducing basic sites that enhance CO2 adsorption affinity at lower temperatures, thereby reducing energy consumption while maintaining capture capacity
Solution Approach 2:
The patent creates a composite material by combining zeolite framework with sodium ions exchanged within the structure, forming a surface-modified zeolite that integrates the porous structure of zeolite with the basicity of sodium ions to achieve enhanced CO2 capture efficiency
2Quantity of substance
If conventional direct air capture technologies are implemented, then CO2 removal from air is achieved, but scalability and commercialization are difficult
Solution Approach 1:
The patent optimizes parameters such as Si/Al ratio and sodium ion content to achieve high CO2 capture efficiency with modified zeolite, making the process more scalable by improving the performance characteristics of the adsorbent material
Solution Approach 2:
The patent utilizes the porous structure of zeolite as a scalable platform for CO2 capture, where the surface-modified zeolite can be easily integrated into existing modular direct air capture systems, facilitating commercialization through its adaptability to various scale configurations
3Quantity of substance
If sodium ion exchange is performed on zeolite, then CO2 adsorption sites are created, but the process requires multiple steps including heating, washing, drying, and calcining
Solution Approach 1:
The patent performs sodium ion exchange and surface modification as preliminary actions during the zeolite preparation process, incorporating these steps into the standard manufacturing workflow to create pre-modified zeolite material that requires minimal additional processing before use
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 surface-modified zeolite achieves high CO2 removal efficiency at room temperature, maintaining activity during repeated use and reducing atmospheric CO2 concentration, with improved adsorption and desorption performance compared to unmodified zeolites.
Implementation Method 1
sodium ion exchange through heating
Implementation Method 2
provides adsorption sites for CO2, allowing for efficient adsorption of acidic CO2
Implementation Method 3
The interaction between the unique framework structure of zeolite and the ion-exchanged sodium ions results in high CO2 adsorption/desorption performance
Implementation Method 4
high CO2 adsorption/desorption performance
Implementation Method 5
the resulting zeolite may undergo additional processes such as washing, drying, and calcining
Data Source
AI summary
The present inventive concept relates to a surface-modified zeolite for direct air capture, and more particularly, to a zeolite for carbon dioxide capture whose surface is modified through sodium ion exchange. The zeolite for carbon dioxide capture is prepared by mixing a zeolite support and a supporting solution to form a mixed solution, heating the mixed solution to perform ion exchange, followed by evaporation, washing, drying and calcining. The resulting zeolite for carbon dioxide capture exhibits excellent CO2 absorption/desorption performance and maintains consistent catalytic activity, allowing for reuse.