Aircraft Hydrogen Catalyst Layout for Leak Oxidation and Detection

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Solution Overview

Problem

Existing aircraft systems using double-walled pipes for hydrogen storage face challenges in effectively managing hydrogen concentrations and leaks, necessitating improved safety measures.

Innovation Solution

An aircraft installation with a structure that delimits a volume containing hydrogen, incorporating a catalyst material for oxidation with ambient air, and a drainage system to manage hydrogen concentration and leaks, featuring temperature sensors for leak detection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If double-walled pipes are used for hydrogen storage and transport, then safety level is improved, but hydrogen concentration management becomes more complex

Engineering Contradiction:

Improvesafety levelVSAvoidhydrogen concentration management

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent converts the potentially harmful accumulation of hydrogen leaks into a beneficial oxidation reaction. By placing catalysts in the interstitial volume between double-walled pipes, any leaked hydrogen is automatically oxidized to water, transforming a safety hazard into a harmless byproduct and simplifying overall safety management.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The catalyst acts as an intermediary substance between leaked hydrogen and ambient oxygen. Instead of directly managing hydrogen concentration through complex detection and ventilation systems, the catalyst mediates the oxidation process, automatically neutralizing hydrogen leaks and reducing management complexity.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Quantity of substance

If catalyst material is added to oxidize hydrogen, then hydrogen concentration control is improved, but device complexity increases

Engineering Contradiction:

Improvehydrogen concentration controlVSAvoidinstallation complexity

Core Design Contradiction:

Quantity of substanceVSDevice complexity

Solution Approach 1:

The patent merges the hydrogen oxidation function with the existing structural space between double-walled pipes. The catalyst is integrated into the interstitial volume that already exists in the hydrogen storage system, combining safety functionality with the structural design rather than adding separate complex systems.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The catalyst system is designed to be self-activating and self-sustaining. Once hydrogen leaks and contacts the catalyst, the exothermic oxidation reaction automatically proceeds without requiring external energy input, control systems, or active management, making the system self-regulating and simple to implement.

Inventive Principle:

Principle #25Self-service

3Productivity

If catalyst is positioned at high point of volume, then hydrogen oxidation efficiency is improved, but water drainage becomes more difficult

Engineering Contradiction:

Improvehydrogen oxidation efficiencyVSAvoidwater drainage

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The patent segments the catalyst placement into two distinct locations: high points for optimal hydrogen oxidation contact and low points for water drainage. This segmentation allows each location to fulfill its specific function without compromising the other, with catalysts at high points efficiently oxidizing hydrogen and separate drainage pathways removing produced water.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces water drainage channels as intermediary pathways that mediate between the oxidation reaction site (high point) and the exterior. These channels provide a dedicated route for water removal that does not interfere with the catalyst's hydrogen oxidation function, allowing both high oxidation efficiency and effective drainage to coexist.

Inventive Principle:

Principle #24Intermediary (Mediator)

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

Effectively consumes hydrogen to prevent excessive concentration and facilitates leak detection through temperature monitoring, enhancing safety and reducing hydrogen risks.

Implementation Method 1

a catalyst material for an oxidation reaction of dihydrogen with ambient air to oxidize dihydrogen

Methodology Applied

Scientific EffectCatalysis: Catalysis

Implementation Method 2

catalyzes the oxidation reaction of dihydrogen with ambient air to oxidize dihydrogen

Methodology Applied

Scientific EffectOxidation: Oxidation

Implementation Method 3

the installation includes, for each catalyst, a temperature sensor arranged to measure the temperature of said catalyst

Methodology Applied

Scientific EffectTemperature measurement:

Data Source

PatentEP4696606A1Aircraft installation comprising a structure defining an internal volume with a high point and an element containing dihydrogen

Publication Date: 2026.02.18 AIRBUS (SAS)

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AI summary

The invention relates to an aircraft installation (100), said installation (100) comprising a structural assembly (102) of the aircraft delimiting a volume (104) with a high point (104a), a container (106) in which dihydrogen is present and which is arranged within the volume (104), and a catalyst (108) for catalyzing an oxidation reaction of dihydrogen with ambient air, wherein the catalyst (108) is fixed within the volume (104) at the high point (104a). With such an arrangement, the dihydrogen is consumed, thus preventing its excessive concentration.