Aircraft Filter with Ionic Liquids for Oil Removal
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Solution Overview
Problem
Existing air filtration systems in aircraft, particularly those using activated charcoal and catalytic oxidation, are ineffective in permanently removing oil residues and pollutants from bleed air and cabin air due to low absorption capacity and complex operation requirements.
Innovation Solution
A filter with a carrier body and a multi-component filter layer that includes physisorption, chemisorption, and oil-dissolving components, utilizing activated carbon, silica, zeolites, amino acids, and ionic liquids to achieve permanent and irreversible removal of pollutants and oil residues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If activated carbon filters are used for filtering bleed air and recirculated cabin air, then pollutants can be bound through physisorption, but the absorption capacity is low and pollutants can be released again when the filter becomes heavily loaded
Solution Approach 1:
The filter layer uses a composite material system combining activated carbon (for physisorption) with ionic liquids (for chemisorption and oil dissolution). This composite approach allows the filter to simultaneously provide reversible physisorption for general pollutants and irreversible chemisorption for permanent pollutant removal, significantly increasing overall absorption capacity and preventing pollutant release
Solution Approach 2:
The invention changes the chemical state and binding parameters by introducing ionic liquids that can dissolve oil components and form strong chemical bonds with pollutants. This parameter change from purely physical adsorption to chemical adsorption and dissolution transforms the filter's interaction with pollutants, enabling permanent binding and greatly enhancing absorption capacity
2Reliability
If catalytic oxidation systems are used to remove unwanted components from cabin air, then pollutants can be removed, but the systems are very complex to install and operate with constant operating conditions required
Solution Approach 1:
The invention extracts and eliminates the complex control systems, temperature regulation mechanisms, and UV radiation sources required for catalytic oxidation. Instead, it uses a passive chemical filter layer with ionic liquids that automatically bind pollutants without requiring external energy input or constant monitoring, dramatically simplifying both installation and operation while maintaining effective pollutant removal
Solution Approach 2:
The filter layer performs pollutant removal autonomously through the inherent chemical properties of ionic liquids. The ionic liquids automatically dissolve oil components and bind pollutants through chemisorption without requiring external control systems, temperature maintenance, or UV radiation, making the system self-sufficient and operationally simple
3Reliability
If a filter layer with multiple components is applied to the carrier body, then permanent and irreversible removal of pollutants and oil residues is achieved, but the manufacturing process becomes more complex
Solution Approach 1:
The invention merges multiple functional components (activated carbon for physisorption, ionic liquids for chemisorption and oil dissolution) into a single integrated filter layer applied to one carrier body. This consolidation allows all three mechanisms to work together in one unified structure, achieving permanent pollutant removal while maintaining manufacturing feasibility through a single application process rather than multiple separate components
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 filter effectively and permanently removes pollutants and oil residues from aircraft air flows with high throughput and low flow resistance, easily integratable into existing systems without additional pressure or pump capacity requirements.
Implementation Method 1
a) a component for the physisorption of components, - wherein the filter layer comprises activated carbon, silica, zeolites
Implementation Method 2
b) a component for the chemisorption of components
Implementation Method 3
c) a component for dissolving oil components containing ionic liquids
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a filter for binding constituents of a gas stream, comprising a supporting member and a filter layer that is applied to the surfaces of the supporting member. According to the invention, the filter layer comprises the following components: a) a component for physically adsorbing constituents; b) a component for chemically adsorbing constituents; c) a component for dissolving oil constituents, said component containing ionic liquids.