Room Air Filtration Using Cyclodextrin Backup Pollutant Binding
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Solution Overview
Problem
Conventional sorptive filter systems for room air filtration face challenges such as equilibrium sorption characteristics, limited pollutant affinity, and saturation issues, leading to incomplete removal of gaseous pollutants like smoke residues and odors, which affects air quality, especially in areas with smoking residues or chemical contaminants.
Innovation Solution
A room air filter system comprising a combination of two or more sorptive filters and binding filters, where the first filter unit uses activated carbon and the second unit employs cyclodextrins, cucurbiturils, or calixarenes as supramolecular complexing agents, which are chemically or physically bound to carrier materials, enhancing pollutant capture and providing a secondary safety level when the first filter saturates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single sorptive filter material (e.g., activated carbon) is used, then the filter system is simple and cost-effective, but the separation rate of pollutants is insufficient due to equilibrium sorption and low affinity for certain pollutants
Solution Approach 1:
The filter system is divided into multiple filter units, each containing different sorptive or binding filter materials with specific pollutant affinities. This segmentation allows each filter unit to target specific pollutant groups, thereby increasing the overall separation rate without requiring a single complex material to handle all pollutants simultaneously.
Solution Approach 2:
The patent combines different types of filter materials (sorptive materials like activated carbon and binding materials like cyclodextrins, cucurbiturils, or calixarenes) into a composite filter system. This composite approach leverages the complementary strengths of each material type to achieve higher pollutant removal efficiency across diverse pollutant types.
2Duration of action of stationary object
If sorptive filter material is used, then the filter can absorb some pollutants, but the material becomes saturated over time and releases pollutants back into the air
Solution Approach 1:
The filter system is designed with multiple filter units that act in sequence, with binding filter materials positioned to capture pollutants that pass through or are released from sorptive materials. This preliminary action of the binding materials prevents pollutant release back into the air, extending the effective service life and maintaining consistent removal performance.
Solution Approach 2:
The binding filter materials serve as a safety buffer or cushion behind the sorptive materials. When sorptive materials approach saturation and begin to release pollutants, the binding materials are already in position to capture these released pollutants, preventing them from entering the cleaned air stream and maintaining reliable pollutant removal throughout the filter's service life.
3Reliability
If conventional sorptive filters are used, then the system is easy to operate, but the cleaning capacity is limited and cannot handle high concentrations of smoke residues and toxic compounds
Solution Approach 1:
The filter system is segmented into multiple specialized filter units, each designed to handle specific types of pollutants or concentration ranges. This segmentation enables the system to process high concentrations of smoke residues and toxic compounds by distributing the cleaning load across multiple units with complementary capabilities.
Solution Approach 2:
The system employs composite filter materials including cyclodextrins, cucurbiturils, and calixarenes that have high affinity and capacity for binding smoke residues and toxic compounds. These composite materials significantly enhance the overall cleaning capacity of the system, enabling it to handle high pollutant loads that would overwhelm conventional single-material filters.
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 system achieves a high degree of pollutant removal, including nicotine and other smoke-related compounds, with cyclodextrins ensuring reliable binding and extended pollutant capture beyond the saturation point of the first filter, improving air quality and extending filter life.
Implementation Method 1
a sorptive first filter unit (1) arranged to be supplied with room air to be filtered
Implementation Method 2
a pollutant-binding second filter unit (2) arranged to be supplied with the air stream from the first filter unit (1)
Data Source
AI summary
The invention relates to a room air filter system for freeing room air from odours and pollutants comprising a sorptively acting first filter unit and an odour- and pollutant-binding second filter unit, wherein the second filter unit is connected downstream of the first filter unit and contains a compound which is capable of binding the odours and pollutants in a hollow space.