In-Situ Magnesium Hydride Tank for Continuous Hydrolysis Hydrogen Release
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Solution Overview
Problem
The separate processes of hydrogen absorption and hydrolysis in previous magnesium hydride devices reduce efficiency, and the hydrolysis product Mg(OH)2 wraps around MgH2 particles, inhibiting further reaction.
Innovation Solution
A device with a stainless steel tank, thermal insulation, and an electric heating wire for in-situ hydrogen absorption and hydrolysis, using magnesium-based alloys with added alloying elements to promote hydrolysis and control hydrogen flow, allowing simultaneous hydrogen absorption and hydrolysis within the same device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If hydrogen absorption and hydrolysis are completed separately in previous devices, then the device structure is simple, but the hydrolysis efficiency is greatly reduced
Solution Approach 1:
The patent combines hydrogen absorption and hydrolysis hydrogen production into a single integrated device. The reaction chamber serves dual purposes: first for hydrogen absorption to form magnesium hydride, and second for hydrolysis to release hydrogen. This merging of two separate processes into one device eliminates the need for separate equipment while dramatically improving hydrolysis efficiency by maintaining the magnesium hydride in situ without transfer losses.
2Quantity of substance
If hydrolysis proceeds for extended period, then hydrogen production increases, but Mg(OH)2 wraps around MgH2 particles blocking contact with water
Solution Approach 1:
The patent applies preliminary action by adding catalyst particles (such as nickel, cobalt, or their compounds) before the hydrolysis reaction begins. These catalysts are pre-dispersed throughout the magnesium hydride material to prevent the formation of continuous Mg(OH)2 blocking layers. The catalysts create preferential reaction pathways that allow water to continuously access fresh MgH2 surfaces, enabling sustained hydrogen production without the reaction being self-inhibiting.
Solution Approach 2:
The patent introduces catalyst particles as intermediaries between water and magnesium hydride. These catalyst particles (nickel, cobalt, or their compounds) mediate the hydrolysis reaction by providing alternative reaction sites that prevent direct formation of blocking Mg(OH)2 layers on MgH2 surfaces. The intermediaries facilitate continuous water-MgH2 contact and maintain reaction reliability throughout the hydrolysis process.
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
Enhances hydrolysis hydrogen production efficiency by integrating hydrogen production, using a device that allows simultaneous hydrogen absorption and hydrolysis, improving hydrogen production without additional materials or exposure to air.
Implementation Method 1
the porous air-guide duct 3 is externally wound with an electric heating wire 5
Implementation Method 2
Magnesium is one of the most abundant light alloys on earth, while China has large abundant reserves. Magnesium hydride generated by the hydrogenation of metallic magnesium
Implementation Method 3
hydrolysis is an exothermic reaction which can take place at room temperature, and has a hydrogen release amount up to 15.2 wt %
Implementation Method 4
An inner side of the stainless steel tank 1 is provided with a thermal insulation layer 2
Data Source
AI summary
A device for in-situ hydrogen absorption and hydrolysis hydrogen production based on magnesium-based solid hydrogen storage alloys and use thereof are provided. The device can directly inject hydrogen into a stainless steel tank to allow the magnesium alloy absorbing hydrogen to generate the hydrogenated magnesium alloy. When hydrogen is needed later, water is introduced to hydrolyze the hydrogenated magnesium alloy to produce the hydrogen. In this process, the magnesium alloy does not need to be taken out and exposed to the air after absorbing hydrogen, nor does it need further treatment, such that the hydrogen absorption and hydrolysis hydrogen production of the magnesium alloy can be completed in steps in the same device, which greatly saves manufacturing time and cost of the hydrolysis hydrogen production tank.