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Hydrogen Storage Tank


UN SDG Category : Responsible Consumption and Production
Innovator : Charu mathi K, Gowri M
Project Guide: Mohan Kumar B
Institution : Sri Ramakrishna Engineering College

Donations are tax deductible u/s 80G

Problem Statement
Storing hydrogen gas into cylinders under high pressure of 350 bar is not safe and requires intensive studies for tank’s designing. Liquid hydrogen faces severe practical difficulties due to its very low density, leading to larger fuel tanks. Moreover, converting hydrogen gas into liquid phase is not an economic process since it consumes high energy needed to cool down the gas temperature to −252.8 °C.One practical solution is storing hydrogen gas in metal lattice such as Mg powder and its nanocomposites in the form of MgH2. A binary system of MgH2/5 wt. % TiMn2 nanocomposite powder that show excellent hydrogenation/dehydrogenation behavior at relatively low temperature (250 °C) with long cycle-life-time.Moreover, a simple hydrogen storage tank filled with our synthetic nanocomposite powders.

Solution
In general solid hydrogen storage tanks differ in their design and materials used. This is because diffusion of hydrogen atoms into metal lattice does not require the application of very high pressure since the gas-solid exothermic reaction takes place at relatively low pressure. Accordingly, the basic process for design, materials selections, and manufacturing of vessels or tanks contain metal hydride, as a source of hydrogen becomes inexpensive. Hydrogen can be simply stored in nanocrystalline metal powders such as Mg and Mg-based nanocomposite powders in the form of MgH2. The choice of Mg is attributed to its high hydrogen capacity. Elemental Mg metal powders and hydrogen gas are used as starting materials. The as-synthesized MgH2 powders were then mixed in the glove with the 5 wt. % of TiMn2 shots, using an agate mortar and pestle. Five gram of the mixed powders for each composite system were charged together with fifty Cr-steel balls into the hardened steel vial and sealed under He gas atmosphere. The vial was then filled with 50 bar of hydrogen gas atmosphere and mounted on the high-energy ball mill.

Beneficiary
It is most useful for common people and cost efficient and reliable when compared to other methods. Hydrogen as a secure ,clean and efficient energy source will be used for many applications. Commonly used storage methods such as high pressure gas or liquid cannot satisfy future storage requirement. Hence, with the use of magnesium powder and nanocomposites. Storing Hydrogen in metal lattice is easy.The dependencies such as Mg powder, the vial(glass container), Cr-steel balls, TiMn2 shots, motor and pestle etc are easily available resources. Easy to implement the project.

Innovation
As storing hydrogen into cylinders or converting it into liquid hydrogen have many practical difficulties. One of the effective solution is storing hydrogen gas in metal lattice such as Mg powder and its nanocomposites in the form of MgH2. We have succeeded to prepare a new binary system of MgH2/5 wt. TiMn2 nanocomposite powder that show excellent hydrogenation/dehydrogenation behavior at relatively low temperature (250 °C) with long cycle-life-time.

India's Sustainable Development
Hydrogen is an energy carrier, which holds tremendous promise as a new clean energy option. It is a convenient, safe, versatile fuel source that can be easily converted to a desired form of energy without releasing harmful emissions. A key advantage of hydrogen is that when burned, carbon dioxide (CO2) is not produced. Hydrogen storage is one of the most crucial factor for increasing the environmental sustainability without causing any harm to the environment. Thus it helps in India's Sustainable Development.

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