From: Anders Sandberg (asa@nada.kth.se)
Date: Mon Mar 17 2003 - 14:52:01 MST
On Mon, Mar 17, 2003 at 12:38:58PM -0500, Spudboy100@aol.com wrote:
> http://www.sciencedaily.com/releases/2003/03/030317074038.htm
>
> I wonder if these filters could separate H² from Water?
That would be cute, but I doubt it. The reaction 2H2+O2 -> 2H2O is quite
exothermic, so to get it to go in the other direction you need to add
energy. However, statistically there is a bit of 2H2O -> 2H2 + O2 going
on all the time. Unfortunately, the equilibrium constant is strongly
biased in the water direction. The calculations on
http://www.psigate.ac.uk/newsite/reference/plambeck/chem1/p01111.htm
show that you get a partial pressure of 2.6 x 10-22 Pa for H2 from water
at normal conditions. That is essentially nothing. There may be
conditions on surfaces where the equilibrium becomes nicer, and at
higher pressure I think you would get more H2. But it doesn't seem to be
as efficient as electrolysis.
However, a salt filter would be great! Just imagine the applications of
efficient desalination.
-- ----------------------------------------------------------------------- Anders Sandberg Towards Ascension! asa@nada.kth.se http://www.nada.kth.se/~asa/ GCS/M/S/O d++ -p+ c++++ !l u+ e++ m++ s+/+ n--- h+/* f+ g+ w++ t+ r+ !y
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