Closed-environment with 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 existing high-temperature catalysts fail to address effectively, often leading to undesired side reactions with organic hydrocarbons.
Innovation Solution
A low-temperature air purification system using a reactor bed with a metal catalyst supported on carbon material, capable of converting 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, with a compact and efficient design that integrates seamlessly into existing systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-temperature catalysts (561-589 K) 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 conventional high temperatures (561-589 K) to low temperatures (below 35°C), 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 avoiding organic hydrocarbon degradation.
Solution Approach 2:
The patent employs a metal catalyst supported on carbon material with specific local properties at the catalyst surface, creating favorable local conditions for selective hydrogen and carbon monoxide conversion. The local catalytic sites are designed to activate these specific gases while remaining inert toward organic hydrocarbons, thus resolving the side reaction problem.
2Productivity
If high-temperature burners are used for air purification, then hydrogen and carbon monoxide conversion is achieved, 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 thermal energy from combustion to drive the conversion, the system uses catalytic action at low temperatures, eliminating the need for complex high-temperature heating equipment and reducing overall system complexity.
Solution Approach 2:
The patent introduces a metal catalyst supported on carbon material as an intermediary substance that facilitates the conversion of hydrogen and carbon monoxide at low temperatures. This catalyst mediator enables the chemical transformation without requiring high-temperature burners, thereby simplifying the system architecture.
3Productivity
If conventional high-temperature processes are used, then complete conversion of gases is achieved, but energy consumption increases
Solution Approach 1:
The patent changes the temperature parameter from high (561-589 K) to low (below 35°C), fundamentally altering the energy requirements of the process. This parameter change maintains complete conversion efficiency of hydrogen and carbon monoxide while dramatically reducing the energy input needed, as no high-temperature heating is required.
Solution Approach 2:
The low-temperature catalytic process is inherently more energy-efficient, requiring minimal external energy input. The catalyst enables the reaction to proceed spontaneously at ambient temperatures, making the system self-sufficient and eliminating the need for energy-intensive heating systems.
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 high conversion efficiencies of hydrogen and carbon monoxide at low temperatures, minimizing side reactions and allowing for a compact, low-power, and simplified air purification process, suitable for integration into various closed-environment applications.
Implementation Method 1
a catalyst that is capable, at a temperature of equal or less than 35°C, of converting the hydrogen to water and converting the carbon monoxide to carbon dioxide
Implementation Method 2
a metal catalyst supported on carbon material
Data Source
Figure 1~3
Figure 2A~2B
AI summary
An article includes a closed-environment air purification system that has a purifier (26) through which air can be recirculated. The purifier (26) 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 (26) has a reactor bed (28) that includes media comprised of support particles and a metal catalyst (34) disposed on the support particles.