Hydrogen Separation Filter With Lattice Expansion for Low-Temp Purification
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Solution Overview
Problem
Existing hydrogen purification methods using metals like palladium, vanadium, tantalum, titanium, and niobium require high temperatures to prevent embrittlement, leading to high energy consumption.
Innovation Solution
A hydrogen separation filter comprising a porous substrate with a lattice expansion layer and a hydrogen dissociation and transmission layer, where the materials have matching crystalline structures and lattice constants, allowing hydrogen purification at lower temperatures by expanding the lattice of the hydrogen dissociation layer to prevent embrittlement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high temperature is used for hydrogen purification with palladium or its alloys, then embrittlement is suppressed, but energy consumption increases
Solution Approach 1:
The invention changes the operating temperature parameter from conventional high temperature (400°C) to lower temperature (200°C or below) by modifying the membrane structure with a lattice expansion layer that has specific lattice constant relationships with the palladium layer, thereby reducing energy consumption while preventing embrittlement
Solution Approach 2:
The invention creates a composite structure consisting of a porous substrate, a lattice expansion layer (first material), and a hydrogen dissociation and transmission layer containing palladium or its alloys (second material). The composite structure leverages the lattice matching between materials to stabilize the palladium layer at lower temperatures, preventing embrittlement without requiring high operating temperatures
2Use of energy by moving object
If a lattice expansion layer is added to enable low-temperature operation, then energy consumption is reduced, but device complexity increases
Solution Approach 1:
The invention uses a porous substrate as the base structure, which provides both mechanical support and transport pathways for hydrogen. The porous structure allows the subsequent lattice expansion and palladium layers to be formed while maintaining overall structural integrity and functionality, reducing the complexity impact of adding multiple layers
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 enables hydrogen purification at lower temperatures, reducing energy consumption and maintaining effective hydrogen separation performance.
Implementation Method 1
a lattice expansion layer, and a hydrogen dissociation and transmission layer. The lattice expansion layer contains a first material... A lattice constant a1, bulk of a first bulk material having a same composition and a same crystalline structure as the first material and a lattice constant a2, bulk of a second bulk material having a same composition and a same crystalline structure as the second material satisfy a formula (1): 1.03a2, bulk≤a1, bulk≤1.15a2, bulk
Implementation Method 2
The hydrogen dissociation and transmission layer is formed on the lattice expansion layer. The hydrogen dissociation and transmission layer contains a second material selected from the group consisting of Pd, V, Ta, Ti, Nb, and alloys thereof
Data Source
AI summary
Provided is a hydrogen separation filter allowing a hydrogen purification at a lower temperature than conventional one, and a method for manufacturing the same. A hydrogen separation filter includes a porous substrate, a lattice expansion layer formed on the porous substrate and containing a first material, and a hydrogen dissociation and transmission layer formed on the lattice expansion layer and containing a second material selected from the group consisting of Pd, V, Ta, Ti, Nb, and alloys thereof. The first material and the second material have a same crystalline structure. A lattice constant a1, bulk of a first bulk material having a same composition and a same crystalline structure as the first material and a lattice constant a2, bulk of a second bulk material having a same composition and a same crystalline structure as the second material satisfy a formula (1):1.03a2, bulk≤a1, bulk≤1.15a2, bulk (1).