Amine Sorbent with Silicon Coating for HVAC CO2 Control
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Solution Overview
Problem
Existing CO2 sorbent materials in HVAC systems fail to meet long-term targets for working capacity and thermal aging stability, leading to inefficiencies in energy consumption.
Innovation Solution
A sorbent comprising a gas-adsorbing material with an amine compound and a hydroxyl-containing additive, such as glycerol, impregnated onto a porous support with a silicon-based coating, enhancing adsorption capacity and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional CO2 sorbent materials are used in HVAC systems, then the system can remove CO2 from recirculated air, but the sorbent materials fail to maintain long-term working capacity and thermal aging stability
Solution Approach 1:
The patent applies composite materials by combining amine compounds (such as diethanolamine or pentaethylenehexamine) with hydroxyl-containing additives (such as glycerol, sorbitol, or sucrose) on a porous support matrix. This composite structure enhances both the CO2 adsorption capacity and thermal stability of the sorbent, allowing it to maintain over 60% of its initial capacity after 100 hours at elevated temperatures, thereby resolving the contradiction between reliability and duration of action.
Solution Approach 2:
The patent employs parameter changes by optimizing the concentration ratios of amine compounds to hydroxyl-containing additives, controlling the loading amount of gas-adsorbing material on the porous support, and adjusting the pore size distribution of the support matrix. These parameter optimizations enable the sorbent to achieve high CO2 adsorption capacity while maintaining exceptional thermal aging stability throughout its service life.
2Use of energy by moving object
If CO2 sorbent materials are used to reduce ventilation requirements, then energy consumption is reduced, but the sorbent materials require frequent replacement due to capacity degradation
Solution Approach 1:
The composite structure of amine compounds combined with hydroxyl-containing additives on a porous support provides both high CO2 adsorption capacity and exceptional thermal aging resistance. This allows the sorbent to maintain reliable performance over extended periods, reducing the frequency of replacement and ensuring consistent energy savings in HVAC applications.
Solution Approach 2:
The patent applies local quality by distributing the gas-adsorbing material uniformly throughout the porous support matrix, ensuring that every region of the sorbent contributes to CO2 adsorption while maintaining consistent thermal stability properties throughout the entire material volume.
3Quantity of substance
If higher amounts of gas-adsorbing material are loaded onto the porous support, then CO2 adsorption capacity increases, but the complexity of the impregnation process increases
Solution Approach 1:
The patent applies preliminary action by pre-mixing the amine compound and hydroxyl-containing additive in appropriate ratios before impregnation, and by pre-characterizing the porous support to determine optimal loading amounts. This preparation work simplifies the subsequent impregnation process while ensuring high CO2 adsorption capacity is achieved through controlled material distribution.
Solution Approach 2:
The patent optimizes the loading amount of gas-adsorbing material as a key parameter, balancing the quantity of amine compound and hydroxyl-containing additive to achieve maximum CO2 adsorption capacity while maintaining a practical and scalable impregnation process that does not require overly complex equipment or procedures.
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 sorbent achieves a high CO2 adsorption capacity and improved thermal stability, maintaining over 60% of its initial capacity after 100 hours at elevated temperatures, thereby reducing energy consumption in HVAC systems.
Implementation Method 1
CO2 sorbent materials have been developed to improve the energy efficiency of HVAC systems. Specifically, HVAC systems have utilized CO2 scrubbers that incorporate CO2 sorbents to adsorb CO2 from recirculated interior air
Implementation Method 2
a gas-adsorbing material comprising an amine compound and a hydroxyl-containing additive
Implementation Method 3
the silicon-based compound forms a silicon-based coating on the porous support
Data Source
AI summary
Disclosed in certain embodiments are carbon dioxide sorbents that include porous particles impregnated with an amine compound.