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    stboulet's Avatar
    stboulet Posts: 1, Reputation: 1
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    #1

    Sep 1, 2008, 06:35 AM
    Cracking Water for Hydrogen Fuel Cell
    Does anyone have any schematics or parts listing, or know where I could obtain one, for a system to crack water into it's constituent parts?

    What I would like to do is setup 5 to 8 KW of PV panels. I would then use the energy generated from this to crack water into hydrogen and oxygen. The hydrogen would then be stored for use later in either a fuel cell or my car.

    Are there plans for such a system out there anywhere?

    Thanks!
    Credendovidis's Avatar
    Credendovidis Posts: 1,593, Reputation: 66
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    #2

    Sep 1, 2008, 07:11 AM
    Hello stboulet

    There are several ways to obtain hydrogen. There are several rather unfriendly chemical processes to the environment, and there is electricity (generated by oil , coal, gas , or nuclear resources), so neither very friendly. Than there is reversed-osmosis, with all it's problems, aluminum alloy and gallium systems, etc. Just Google your way into knowledge.

    But if I were you I would use electricity : a strong current through a reservoir full of water that is made conducting by adding some sodium crystals will do the trick : catch at one side hydrogen, and at the other side oxygen.

    Yes there are not many plans, but electricity is the standard way to get hydrogen and oxygen.

    Problem : you are not allowed to store hydrogen in a residential area, and you require a license for anywhere else. Because of the danger by the unpreventable leaking of - and resulting explosions by - hydrogen.

    Partslist :

    One water reservoir
    Water
    Pack of table salt
    2 electrodes
    Power supply
    Gas collection and storage device

    Schematics :

    See this website for general instructions and take it from there!

    Advice :

    Do your wife and children a big favor and get a huge all-covering life insurance...

    Success !

    :>)

    .
    asking's Avatar
    asking Posts: 2,673, Reputation: 660
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    #3

    Sep 2, 2008, 03:30 PM
    Plants crack water during photosynthesis. There's an article about efforts to mimic this process in the current E&S, Caltech's almuni magazine.

    I have been reading it, not finished.

    http://eands.caltech.edu/articles/LXXI2/lewis.pdf
    Credendovidis's Avatar
    Credendovidis Posts: 1,593, Reputation: 66
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    #4

    Sep 4, 2008, 05:18 PM
    Quote Originally Posted by asking
    Plants crack water during photosynthesis. There's an article about efforts to mimic this process in the current E&S, Caltech's almuni magazine. I have been reading it, not finished. http://eands.caltech.edu/articles/LXXI2/lewis.pdf
    Excellent article ! Thanks for the link !

    :)
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
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    #5

    Sep 4, 2008, 05:36 PM
    I did that in grade school. Used a platinum screen for electrodes and inverted test tubes in water. The hydrogen collects at 2x the rate, if I remember.

    Storage of hydrogen would require a way to presurize it.
    Credendovidis's Avatar
    Credendovidis Posts: 1,593, Reputation: 66
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    #6

    Sep 5, 2008, 08:06 PM
    Actually I am more interested in asking's post and link about plants that crack water by photosynthesis.

    If we could put that process working for us more efficiently...

    :)

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