Benzyl Amine Sorbent for Low-Temperature CO2 Regeneration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for removing carbon dioxide from gas mixtures are inadequate in terms of sorption efficiency and regeneration temperature, particularly in enclosed spaces where efficient and low-temperature regeneration is needed.
Innovation Solution
The use of benzyl amine moieties immobilized on a solid support as a carbon dioxide adsorbent, which exhibits high carbon dioxide adsorption at room temperature and can be regenerated by heating to a temperature range of 55°C to 75°C at atmospheric pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional sorbent materials (e.g., ion exchange resins, silica with amine ligands) are used for carbon dioxide adsorption, then carbon dioxide removal capability is achieved, but regeneration requires high temperature (above 100°C) or complex conditions (steam, vacuum, pressure reduction)
Solution Approach 1:
The invention changes the chemical parameters of the sorbent material by using benzyl amine moieties with specific molecular structure and properties. This chemical modification enables the sorbent to achieve both high carbon dioxide adsorption capacity and low-temperature regeneration (55-75°C), resolving the contradiction between effective CO2 removal and energy-efficient regeneration
Solution Approach 2:
The invention employs a composite structure consisting of benzyl amine moieties immobilized on a solid support matrix. This composite material combines the high adsorption affinity of benzyl amine with the structural stability of the solid support, enabling effective carbon dioxide capture at room temperature and easy regeneration at low temperatures, thus resolving the contradiction between adsorption performance and regeneration energy requirements
2Quantity of substance
If high adsorption capacity is achieved using conventional sorbents, then carbon dioxide removal efficiency is improved, but the regeneration process becomes more complex requiring steam, vacuum, or pressure reduction
Solution Approach 1:
By changing the chemical parameters of the sorbent to use benzyl amine moieties, the invention achieves high carbon dioxide adsorption capacity while simplifying the regeneration process to merely heating at 55-75°C at atmospheric pressure, eliminating the need for complex steam injection, vacuum systems, or pressure reduction equipment
Solution Approach 2:
The invention extracts and utilizes the specific properties of benzyl amine moieties that provide both high carbon dioxide binding affinity and temperature-sensitive desorption behavior. This extraction of key functional properties allows the sorbent to achieve high adsorption capacity with simple thermal regeneration, resolving the contradiction between adsorption performance and process simplicity
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
This approach allows for effective carbon dioxide removal and regeneration at relatively low energy costs, making it suitable for reducing carbon dioxide levels in enclosed spaces such as buildings and vehicles.
Implementation Method 1
contacting the mixture of gases with a carbon dioxide adsorbent to adsorb carbon dioxide from the mixture of gases, wherein the adsorbent comprises benzyl amine moieties immobilised on a solid support
Implementation Method 2
regenerating the adsorbent by desorbing carbon dioxide from the adsorbent, wherein the regeneration comprises heating to a temperature in the range from 55°C to 75°C
Data Source
Figure 1
Figure 2
AI summary
The present invention relates to a process for removing carbon dioxide from a mixture of gases, and to a process for reducing the partial pressure of carbon dioxide in an enclosed space. The processes of the present invention employ a carbon dioxide adsorbent comprising benzyl amine moieties immobilised on a solid support. The process comprises regenerating the adsorbent by heating to a temperature in the range from 40°C to 75°C.