Polymeric Sorbent Air Filters for Reactive Gas Removal
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Solution Overview
Problem
Current air filtration technologies are inadequate in effectively removing reactive gases such as acid gases from the air, particularly those containing halogen, nitrogen, or sulfur atoms, due to limitations in sorbent materials and filtration mechanisms.
Innovation Solution
Development of air filters utilizing polymeric sorbent particles formed from a divinylbenzene/maleic anhydride precursor material covalently attached with nitrogen-containing compounds, which are supported by various filter structures to capture and retain reactive gases efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional filtration materials are used, then the filter structure is simple and easy to manufacture, but the ability to remove reactive gases is insufficient
Solution Approach 1:
The patent uses composite polymeric sorbent particles made from divinylbenzene and maleic anhydride precursors, creating a material that combines the structural stability of crosslinked polymers with the reactive functionality of anhydride groups. This composite structure enables effective reactive gas removal while maintaining manufacturability through established polymerization processes
Solution Approach 2:
The patent modifies the chemical parameters of the sorbent material by introducing nitrogen-containing compounds that covalently attach to the polymeric structure. This chemical modification changes the sorbent's affinity and selectivity for reactive gases, dramatically improving removal capability without requiring complex device architecture
2Reliability
If sorbent capacity is increased to improve gas removal, then the filtration effectiveness improves, but the cost and complexity of the filter increases
Solution Approach 1:
The patent employs porous polymeric sorbent particles that provide high surface area and internal volume for gas sorption. The porous structure increases the effective capacity of the sorbent material, allowing robust reactive gas removal while maintaining reasonable material loading and filter thickness
Solution Approach 2:
By chemically modifying the polymeric precursor with nitrogen-containing compounds, the patent enhances the sorbent's chemical affinity for reactive gases. This parameter change in chemical functionality increases sorption capacity without requiring proportional increases in material quantity or filter complexity
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 air filters demonstrate enhanced capability in removing reactive gases, with the polymeric sorbent particles effectively sorbing acid gases and maintaining their capacity over time, as evidenced by breakthrough curves, thereby improving air quality.
Implementation Method 1
polymeric sorbent particles formed from a divinylbenzene/maleic anhydride precursor material covalently attached with nitrogen-containing compounds, which are supported by various filter structures to capture and retain reactive gases efficiently
Data Source
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AI summary
An air filter including a filter support that supports polymeric sorbent particles. The polymeric sorbent is the reaction product of a divinylbenzene/maleic anhydride precursor polymeric material with a nitrogen-containing compound. The air filter may be used for capturing e.g. reactive gases.