Amine-Impregnated Silica Gel Adsorbent for CO2 Removal
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Solution Overview
Problem
Carbon dioxide adsorbents used in continuous processing methods require higher strength and abrasion resistance due to friction and collision with containers, which existing adsorbents do not adequately provide.
Innovation Solution
A carbon dioxide adsorbent is manufactured by impregnating silica gel with an amine aqueous solution, resulting in a material with specific particle size, pore diameter, and pore volume ranges, enhancing adsorptive performance and abrasion resistance for continuous processing systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a carbon dioxide adsorbent is used in a continuous processing method, then carbon dioxide removal efficiency is improved, but abrasion resistance deteriorates due to friction and collision
Solution Approach 1:
The patent uses a composite material consisting of silica gel particles coated with an amine compound. The silica gel provides the structural framework and abrasion resistance, while the amine compound coating provides the carbon dioxide adsorption functionality. This composite structure allows the adsorbent to withstand the mechanical stresses of continuous processing while maintaining high carbon dioxide removal efficiency.
Solution Approach 2:
The patent employs porous silica gel particles with controlled pore structures. The porous structure provides high surface area for amine compound attachment while maintaining particle strength. The specific pore size distribution allows for effective carbon dioxide diffusion and adsorption, and the porous silica gel matrix provides mechanical strength to resist abrasion during continuous operation.
2Productivity
If the carbon dioxide adsorbent moves continuously through processing towers, then processing efficiency is improved, but particle strength deteriorates due to friction and collision
Solution Approach 1:
The composite structure of silica gel core with amine compound coating provides both the mechanical strength needed for continuous movement and the chemical functionality for carbon dioxide adsorption. The silica gel matrix acts as a robust scaffold that withstands mechanical stress, while the coating layer maintains adsorption performance.
Solution Approach 2:
The patent optimizes physical parameters including particle size (0.3-3.0 mm), pore volume (0.3-1.5 mL/g), and pore diameter (10-100 nm) to balance mechanical strength and adsorption performance. These parameter optimizations ensure particles can withstand continuous processing while maintaining high carbon dioxide removal efficiency.
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 resulting adsorbent exhibits superior carbon dioxide adsorbing performance and sufficient strength to withstand the demands of continuous processing methods, ensuring effective and durable operation.
Implementation Method 1
a carbon dioxide adsorbent that reversibly adsorbs carbon dioxide contained in a gas to be processed
Implementation Method 2
impregnating silica gel with the amine aqueous solution
Data Source
AI summary
A carbon dioxide adsorbent including silica gel and an amine compound carried by the silica gel. The silica gel has a spherical shape, a particle size ranging from 1 mm to 5 mm inclusive, an average pore diameter ranging from 10 nm to 100 nm inclusive, a pore volume ranging from 0.1 cm3/g to 1.3 cm3/g inclusive, and a waterproof property N that is defined by an expression (1) and that is not lower than 45%,N=(W/W0)×100 (1)whereN is the waterproof property in percentage (%) of the silica gel,W0 is a total number of particles of the silica gel immersed in water,W is a number of particles of the silica gel not subjected to breakage out of W0.