Closed-environment air purification system
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Solution Overview
Problem
Closed-environment systems, such as spacecraft and submarines, face challenges in maintaining breathable air due to the accumulation of hydrogen and carbon monoxide, which require high-temperature catalysts for removal, leading to undesired side reactions with organic hydrocarbons.
Innovation Solution
A low-temperature air purification system using a reactor bed with support particles and a metal catalyst, such as platinum or palladium, that converts hydrogen to water and carbon monoxide to carbon dioxide at temperatures below 35°C, eliminating the need for high-temperature burners and reducing side reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-temperature catalysts (550-600°F) are used to convert hydrogen and carbon monoxide, then catalytic activity is achieved, but undesired side reactions with organic hydrocarbons occur
Solution Approach 1:
The patent changes the temperature parameter from high (550-600°F) to low (below 35°C or 95°F), fundamentally altering the operating conditions to achieve catalytic conversion without side reactions. This parameter change resolves the contradiction by enabling hydrogen and carbon monoxide conversion while preventing organic hydrocarbon decomposition.
Solution Approach 2:
The patent uses composite catalyst materials including platinum group metals (platinum, palladium, rhodium) supported on aluminum oxide, silica, or titania. These composite structures provide high catalytic activity at low temperatures while maintaining selectivity to avoid side reactions with organic hydrocarbons present in the air.
2Reliability
If high-temperature burners are used for air purification, then hydrogen and carbon monoxide are removed, but system complexity and power requirements increase
Solution Approach 1:
The patent replaces the mechanical high-temperature burner system with a low-temperature catalytic reactor. Instead of using combustion and high-temperature thermal processes, the system uses catalytic surfaces to facilitate chemical reactions at ambient or near-ambient temperatures, significantly reducing system complexity and power requirements.
Solution Approach 2:
By changing the temperature parameter from high to low, the patent eliminates the need for complex heating systems, insulation, and high-power energy inputs required by traditional burners. The catalytic process operates passively or with minimal energy input, simplifying the overall system design.
3Productivity
If high-temperature processing is used, then conversion efficiency is achieved, but energy consumption increases
Solution Approach 1:
The patent changes the temperature parameter from high (requiring significant energy input) to low (operating at or near ambient temperature). This parameter change maintains high conversion efficiency for hydrogen and carbon monoxide while dramatically reducing energy consumption by eliminating the need for high-temperature heating and maintaining thermal processes.
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 effectively removes hydrogen and carbon monoxide at low temperatures, preventing side reactions and achieving high conversion efficiencies, with a compact and low-power design suitable for integration into existing systems, maintaining safe air quality without the need for high-temperature burners.
Implementation Method 1
The purifier has a reactor bed that includes media comprised of support particles and a metal catalyst disposed on the support particles. The purifier is capable at a temperature of equal or less than 35° C. of converting hydrogen in the air to water and converting carbon monoxide in the air to carbon dioxide.
Data Source
AI summary
An article includes a closed-environment air purification system that has a purifier through which air can be recirculated. The purifier is capable at a temperature of equal or less than 35° C. of converting hydrogen in the air to water and converting carbon monoxide in the air to carbon dioxide. The purifier has a reactor bed that includes media comprised of support particles and a metal catalyst disposed on the support particles.