[Gasification] Sail-cloth employed to concentrate hydrogen

[Art Krenzel]

Mark,

You honor me - Thank you, sir!

Per Wikkipedia:  helium's diffusion rate through solids is three times that 
of air and around 65% that of hydrogen.

You guys get into the darnedest projects!  :-))

Art


----- Original Message ----- 
From: "Mark Ludlow" <mark at ludlow.com>
To: "'Discussion of biomass pyrolysis and gasification'" 
<gasification at listserv.repp.org>
Sent: Monday, January 14, 2008 9:45 PM
Subject: Re: [Gasification] Sail-cloth employed to concentrate hydrogen


> Andy,
>
> Bear in mind that a hydrogen molecule is two atoms (H2) while a helium
> "molecule" is just one atom. The hydrogen is lighter and thus would 
> diffuse
> faster but I'm betting that diffusion through a given membrane is probably
> roughly equivalent. In any case, atomic structures really don't resemble 
> the
> "stick-and-ball" rigid representations of high school chemistry so your
> question probably is best answered with an "....it depends" kind of 
> answer.
>
> Now, Art will give us the real answer...
>
> Mark