Composite Hydrogen Membrane With Graphene for High-Purity Separation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing hydrogen separation technologies are inefficient and costly, with conventional membranes requiring large amounts of expensive metals like palladium and failing to effectively block impurities, leading to high manufacturing costs and reduced purity.
Innovation Solution
A composite membrane comprising a porous substrate with a multi-layer structure, including palladium layers sandwiched by graphene or graphene oxide, which splits hydrogen molecules into atoms or protons while blocking larger compounds, reducing metallic layer thickness and enhancing purity and thermal stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional membranes use large amounts of expensive metals like palladium, then hydrogen separation purity is improved, but manufacturing cost increases
Solution Approach 1:
The patent uses a composite membrane structure combining graphene oxide layers with palladium catalyst layers. The graphene oxide serves as a support structure that reduces the amount of palladium needed while maintaining hydrogen separation purity. This composite approach allows achieving high purity hydrogen separation with reduced expensive metal content.
Solution Approach 2:
The graphene oxide layer acts as an intermediary between the palladium catalyst layers and the hydrogen gas stream. It facilitates hydrogen molecule adsorption and dissociation while blocking larger impurity molecules, thereby enabling effective hydrogen separation with reduced palladium content.
2Reliability
If catalytic metallic layers are made thicker, then hydrogen separation purity is improved, but hydrogen flux decreases
Solution Approach 1:
The patent applies different thicknesses to different layers of the composite membrane. The graphene oxide support layers are made thicker to provide structural support and impurity blocking, while the palladium catalyst layers are made thinner to maintain high hydrogen flux. This local differentiation of layer thicknesses optimizes both purity and productivity.
Solution Approach 2:
The patent changes the physical and chemical parameters of the membrane layers, specifically the thickness and composition ratios. By optimizing the thickness of palladium layers versus graphene oxide layers, the system achieves high hydrogen flux while maintaining effective impurity blocking and separation purity.
3Ease of manufacture
If conventional membranes lack intermediate layers, then manufacturing simplicity is maintained, but impurity blocking capability deteriorates
Solution Approach 1:
The patent introduces an intermediate graphene oxide layer between the palladium catalyst layers and the substrate. This intermediate layer provides effective impurity blocking capability while maintaining manufacturability through established composite material fabrication techniques. The graphene oxide layer can be deposited using conventional methods such as chemical vapor deposition.
4Loss of substance
If metallic layers are made thinner, then manufacturing cost is reduced, but thermal and chemical stability deteriorates
Solution Approach 1:
The patent uses graphene oxide as a stable support structure that provides thermal and chemical stability to the thin palladium catalyst layers. The graphene oxide matrix maintains structural integrity at elevated temperatures and resists chemical degradation, thereby stabilizing the thin metallic layers while reducing overall metal content.
Solution Approach 2:
The graphene oxide intermediate layer acts as a protective mediator between the thin palladium layers and the harsh chemical environment. It shields the thin metallic layers from direct exposure to impurities and extreme conditions, maintaining their stability despite reduced thickness and content.
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 composite membrane achieves high hydrogen permeability and purity with reduced material costs, enabling scalable industrial applications and potential use in proton separation processes.
Implementation Method 1
The porous substrate has a pore structure. The pore structure is configured to allow diffusion of hydrogen molecules through the porous substrate.
Implementation Method 2
The multi-layer membrane is configured to, in response to contacting a hydrogen molecule present in the gas stream, split the hydrogen molecule into at least one of hydrogen atoms or protons.
Implementation Method 3
The multi-layer membrane is configured to allow passage of the hydrogen atoms or protons through the multi-layer membrane while blocking passage of compounds that may be present in the gas stream that are larger than hydrogen molecules.
Implementation Method 4
The hydrogen atoms or protons, after passing through the multi-layer membrane, combine to reform the hydrogen molecule.
Data Source
AI summary
An apparatus includes a porous substrate and a multi-layer membrane. The porous substrate has a pore structure configured to allow diffusion of hydrogen molecules through the porous substrate. The multi-layer membrane is configured to, in response to contacting a hydrogen molecule present in the gas stream, split the hydrogen molecule into at least one of hydrogen atoms or protons. The multi-layer membrane is configured to allow passage of the hydrogen atoms or protons through the multi-layer membrane while blocking passage of compounds that may be present in the gas stream that are larger than hydrogen molecules. The hydrogen atoms or protons, after passing through the multi-layer membrane, combine to reform the hydrogen molecule. The multi-layer membrane includes a first metallic layer, an intermediate layer, and a second metallic layer.