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Thread: Hydrogen compressibility and storage

  1. #1 Hydrogen compressibility and storage 
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    Was watching a NOVA special the other night subject-Hydrogen and its increased ability to be compressed when the container has charred chicken feathers in it. The program demonstrated the process of charring the feathers, which then results in small holes in the structures into which hydrogen molecules can collect/be stored. According to the program, this allows more hydrogen to be stored in a contain that than just by compressing it. That is counter-intuitive for me...it would seem that more hydrogen could be compressed in a tank without the charred feathers. If one put a sponge in a water tank and added water, the tank should hold less water than an equal sized tank with just water. Can someone explain it to me?


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  3. #2  
    Forum Cosmic Wizard
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    >That is counter-intuitive for me...it would seem that more hydrogen could be compressed in a tank without the charred feathers.

    The process that allows this is called "adsorption," It allows hydrogen molecules to adhere to the surface of materials. In very porous materials with a lot of surface area, this allows more hydrogen to be stored than if it were just floating around as a gas at the same pressure. Google "hydrogen adsorption" for more info.


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