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Thread: water vapor question

  1. #1 water vapor question 
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    Does anybody knows about a material (media or cloth) that allows the molecules of water to pass through but not the air (normal air).
    Thanks
    JP


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  3. #2 Re: water vapor question 
    Forum Ph.D. Nevyn's Avatar
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    Quote Originally Posted by jp16
    Does anybody knows about a material (media or cloth) that allows the molecules of water to pass through but not the air (normal air).
    Thanks
    JP
    no, i don't thing there is one


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  4. #3  
    Forum Ph.D. Nevyn's Avatar
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    do you mean all the gases in the air?
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  5. #4  
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    Retain the air with/or any gas that is being exhaled out of the body. (CO2, Oxigen or any mix) while the vapor (water) is allowed to pass through.
    JP
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  6. #5  
    Forum Ph.D. Nevyn's Avatar
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    i don't think we have found a material as fine as that. and wouldn't the smaller air particals such as oxygen be aloud to fit through as well
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  7. #6  
    Forum Sophomore Kabooom's Avatar
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    Well I would think the vice-versa would be possible because of H2O's properties. I think your idea might be possible through a multiple filter process, but not in the way you are thinking of it...
    WHAT?!
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  8. #7  
    Forum Professor leohopkins's Avatar
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    A semi-permiable membrane ??

    Im not sure though.
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  9. #8  
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    Membranes have been used to de-gassify water for years now, but they are only small scale units suitable for laboratory experiments. Some industrial processes have to 'dearate' water to work properly. I believe this later process is achieved by (almost) filling a tank then pumping out the remaining air. The reduction in pressure causes the gas bubbles to expand and rise to the surface

    For a foothold into the membrane technology see:-

    http://www.liqui-cel.com/uploads/doc...Technology.pdf
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  10. #9  
    Forum Senior anand_kapadia's Avatar
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    Quote Originally Posted by leohopkins
    A semi-permiable membrane ??

    Im not sure though.
    Semi permeable
    It's the same. In that too the water molecules pass through pores which is air.
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  11. #10  
    Forum Senior anand_kapadia's Avatar
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    Also it doesn't pass through air molecules it displaces the air molecules.
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