Methanol Reforming Hydrogen Charging With Low-Pressure Alloy Storage
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Solution Overview
Problem
Current hydrogen production and storage methods face challenges in safety, efficiency, and cost, particularly due to high-pressure storage and leakage risks, which hinder the widespread adoption of hydrogen energy.
Innovation Solution
An integrated system utilizing methanol reforming, palladium membrane purification, pressure swing adsorption, and low-pressure metal alloy storage tanks to produce and store hydrogen safely and efficiently, including a compressor, heat exchanger, vacuum pump, and hydrogen charger.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If hydrogen is stored in compressed form in steel cylinders, then hydrogen storage density is improved, but safety risks and infrastructure costs increase
Solution Approach 1:
The patent changes the storage parameter from high-pressure compressed hydrogen to low-pressure metal alloy hydrogen storage. The metal alloy tanks store hydrogen at atmospheric pressure through absorption, fundamentally changing the pressure parameter from thousands of psi to near-atmospheric levels, thereby eliminating safety risks associated with high-pressure storage while maintaining storage capability.
Solution Approach 2:
The patent employs metal alloy materials (such as magnesium-based, titanium-based, or lanthanum-based alloys) that combine hydrogen absorption capability with structural integrity. These composite material systems enable hydrogen storage without requiring high-pressure containment, resolving the contradiction between storage density and safety.
2Quantity of substance
If hydrogen is compressed and decompressed for fuel cell supply, then hydrogen can be stored and transported, but time consumption and operational complexity increase
Solution Approach 1:
The patent extracts the compression and decompression steps from the hydrogen supply chain by using metal alloy tanks that store hydrogen directly at atmospheric pressure. This eliminates the need for energy-intensive compression during storage and decompression during dispensing, significantly reducing time consumption and operational complexity.
Solution Approach 2:
The metal alloy hydrogen storage tank acts as an intermediary that absorbs hydrogen at low pressure and releases it on demand without requiring compression or decompression cycles. This intermediary storage mechanism bypasses the time-consuming compression/decompression process entirely.
3Productivity
If high-pressure hydrogen refueling infrastructure is built, then hydrogen can be supplied to fuel cells, but construction costs and safety thresholds increase
Solution Approach 1:
The patent fundamentally changes the pressure parameter of hydrogen refueling infrastructure from high-pressure (350-700 bar) to low-pressure (atmospheric) storage and dispensing. This parameter change simplifies infrastructure requirements, eliminates the need for high-pressure compressors and specialized safety systems, while maintaining hydrogen supply capability to fuel cells.
4Reliability
If hydrogen is stored in metal alloy tanks at low pressure, then safety risks are reduced, but storage density compared to compressed hydrogen decreases
Solution Approach 1:
The patent uses advanced metal alloy materials with high hydrogen absorption capacity (such as magnesium-based, titanium-based, or lanthanum-based alloys) to compensate for the lower storage density compared to compressed hydrogen. These materials provide high volumetric storage density while maintaining safety through low-pressure operation.
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 system achieves high-purity hydrogen storage in low-pressure metal alloy tanks, reducing safety risks and infrastructure costs, enabling rapid hydrogen refueling and promoting hydrogen energy use.
Implementation Method 1
The hydrogen generator makes the generated hydrogen pass through a palladium membrane purification device in the hydrogen generator for a first purification
Implementation Method 2
The pressure swing adsorption device is connected to the heat exchanger. The pressure swing adsorption device performs a second purification on the cooled down hydrogen by adsorption
Implementation Method 3
The vacuum pump is connected to the pressure swing adsorption device. The vacuum pump depressurizes the pressure swing adsorption device during desorption
Implementation Method 4
The heat exchanger is connected to the compressor. The heat exchanger cools down the compressed hydrogen
Data Source
AI summary
The present invention provides an integrated hydrogen production and charging system, including a hydrogen generator, a compressor, a heat exchanger, a pressure swing adsorption device, a vacuum pump, and a hydrogen charger. The hydrogen generator generates hydrogen by methanol reforming. The hydrogen generator makes the generated hydrogen pass through a palladium membrane purification device in the hydrogen generator for a first purification. The compressor compresses the hydrogen from the hydrogen generator. The heat exchanger, connected to the compressor, cools down the compressed hydrogen. The pressure swing adsorption device, connected to the heat exchanger, performs a second purification on the cooled down hydrogen by adsorption. The vacuum pump, connected to the pressure swing adsorption device, depressurizes the pressure swing adsorption device during desorption. The hydrogen charger charges the hydrogen from the pressure swing adsorption device into one or more metal alloy hydrogen storage tanks.