Thread: water vapor question

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

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

do you mean all the gases in the air?

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

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

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...

A semi-permiable membrane ??

Im not sure though.

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

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.

Also it doesn't pass through air molecules it displaces the air molecules.