Redox Device Gas Purification Unit for Hydrogen Oxygen Safety
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Solution Overview
Problem
Redox devices configured as fuel cells or electrolyzers face safety hazards due to the risk of forming explosive hydrogen/oxygen gas mixtures during startup, especially in closed operation regenerative fuel cell systems, where flushing with inert gases is not feasible.
Innovation Solution
Incorporating a gas purification unit with a recombination catalyst unit, preferably using platinum metal catalyst elements, to catalyze the recombination of hydrogen and oxygen gases into water within the redox device, thereby preventing the formation of hazardous gas mixtures without the need for inert flushing gases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If flushing with inert gas is used to prevent hydrogen/oxygen gas mixtures, then safety is improved, but the system must be opened for flushing which is not feasible for closed operation regenerative fuel cell systems
Solution Approach 1:
The harmful inert flushing gas is extracted from the system, replaced by a catalytic recombination unit that actively removes hydrogen/oxygen gas mixtures. The catalyst unit is integrated within the closed system, allowing continuous operation without opening for flushing.
Solution Approach 2:
A catalytic recombination unit acts as an intermediary mechanism between the hydrogen and oxygen gases. The catalyst promotes recombination of these gases into water, preventing explosive mixture formation without requiring system opening or inert gas introduction.
2Reliability
If inert flushing gas is used to prevent explosive mixtures, then safety is improved, but operational costs increase due to consumption of flushing gas
Solution Approach 1:
The catalytic recombination unit enables the system to self-regulate and prevent hazardous gas mixtures using only the hydrogen and oxygen already present in the system. No external flushing gas is consumed, as the catalyst promotes recombination of existing gases into water.
Solution Approach 2:
The potentially harmful hydrogen and oxygen gases that could form explosive mixtures are converted into beneficial water through catalytic recombination. This eliminates the need for inert flushing gas while safely managing the hazardous gases.
3Reliability
If inert flushing gas is used to prevent hydrogen/oxygen gas mixtures, then safety is improved, but device complexity increases due to additional flushing infrastructure
Solution Approach 1:
The safety function is merged with the existing redox unit structure by integrating the catalytic recombination unit within the same housing. This eliminates the need for separate flushing infrastructure while maintaining safety functionality.
Solution Approach 2:
The complex inert gas flushing infrastructure is extracted and replaced by a simple catalytic recombination unit. The catalyst unit requires no external gas supply lines, valves, or control systems for flushing operations.
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
This solution enhances operational safety and reduces operational costs by eliminating the requirement for inert flushing gases, ensuring safe operation and efficient gas purification within the redox device.
Implementation Method 1
Incorporating a gas purification unit with a recombination catalyst unit, preferably using platinum metal catalyst elements, to catalyze the recombination of hydrogen and oxygen gases into water within the redox device
Implementation Method 2
a redox reaction is carried out by means of the unit, in which redox reaction, with release of energy in the form of electric power which is released via the electric circuit, the first gas is oxidized and the second gas is reduced
Data Source
AI summary
A redox device, in particular a hydrogen-oxygen redox device, includes at least one redox unit which is provided for carrying out at least one redox reaction with consumption and/or production of a first gas, in particular hydrogen gas, and/or of a second gas, in particular oxygen gas. The redox device includes at least one gas purification unit for freeing the hydrogen gas of contamination by oxygen gas and/or freeing the oxygen gas of contamination by hydrogen gas.