Membrane Attachment Technique for Hydrogen Separation
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Solution Overview
Problem
Existing hydrogen separation devices using palladium alloy membranes face inefficiencies due to thick membrane thickness, leading to slow separation rates and high implementation costs, along with challenges in securely attaching thin membranes to substrates, resulting in leakage and detachment issues.
Innovation Solution
A method of securing a metal membrane to a substrate involves depositing a thin metal layer, typically palladium, silver, or copper, onto the substrate surface using sputtering and bonding it with a burn-in process that applies heat and pressure in an enclosed environment, ensuring a secure attachment and reducing membrane thickness to enhance separation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a thick palladium membrane is used for hydrogen separation, then the membrane provides sufficient separation function, but the separation rate becomes slow and the implementation cost increases
Solution Approach 1:
The patent changes the thickness parameter of the palladium membrane from conventional thick dimensions to a thin membrane configuration. This parameter change enables faster hydrogen separation rates while reducing material costs, as the thin membrane maintains sufficient separation functionality without the drawbacks of thickness-related inefficiencies
Solution Approach 2:
The patent employs a composite structure consisting of a substrate and a thin palladium membrane layer deposited upon it. This composite approach allows the membrane to achieve effective hydrogen separation with reduced thickness, combining the structural support of the substrate with the separation functionality of the thin palladium layer
2Productivity
If a thin membrane is used to improve separation rate, then the separation efficiency increases, but the membrane becomes difficult to secure to the substrate, resulting in leakage and detachment
Solution Approach 1:
The patent applies a preliminary action by depositing a metal layer onto the substrate surface before attaching the thin membrane. This preparatory step creates a bonding interface that enhances the security of the membrane attachment, preventing detachment and leakage while maintaining the thin membrane configuration for high separation rates
Solution Approach 2:
The deposited metal layer serves as an intermediary between the substrate and the thin membrane. This intermediate layer facilitates secure bonding, ensuring reliable attachment of the thin membrane to the substrate while allowing the membrane to maintain its thin profile for efficient hydrogen separation
3Length of stationary object
If a thin metal layer is deposited onto the substrate, then the membrane thickness is reduced for better performance, but the bonding process requires extended time and controlled conditions
Solution Approach 1:
The patent optimizes bonding parameters including temperature, pressure, and atmosphere composition to achieve effective bonding in reduced time. By controlling these parameters, the process achieves secure membrane attachment without requiring excessively long bonding durations, balancing quality with time efficiency
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 approach results in a more secure attachment of thin membranes, reducing leakage and detachment risks, increasing membrane lifetime, and enhancing hydrogen separation rates while lowering manufacturing costs.
Implementation Method 1
depositing the metal layer comprises performing a sputtering process
Implementation Method 2
the bonding process comprises applying heat and pressure in an enclosed environment
Implementation Method 3
the bonding process comprises applying heat and pressure in an enclosed environment
Implementation Method 4
The hydrogen diffuses through the membrane and is thereby separated from the other gasses in the gas mixture that are unable to pass through the membrane
Data Source
AI summary
Disclosed herein is a method of securing a membrane to a substrate, the method comprising: depositing a metal layer onto a surface of a substrate; and performing a bonding process that bonds a metal membrane onto the deposited metal layer.