Re: But there is a catch. Hydrogen generally doesn't occur in nature by itself, but rather in combination with other elements. Today it is usually produced from fossil fuel.
- From: fkasner <fkasner@xxxxxxxxxxxxx>
- Date: Sun, 13 Aug 2006 01:08:59 GMT
Don Lancaster wrote:
lkgeo1 wrote:
Fortunately more environmentally friendly ways of making hydrogen are
at hand. High school chemistry students make it by running an electric
current through water, a process called electrolysis, which splits
water molecules to release their hydrogen.
Not even wrong.
Electrolysis is an environmentally disasterous method of producing hydrogen because of the staggering loss of exergy.
Thermodynamic fundamentals ABSOLUTELY GUARANTEE that electrolysis will NEVER be a significant source of hydrogen for bulk energy apps.
Elecytrolysis is pretty much the same as 1:1 exchanging US dollars for Mexican pesos.
There ALWAYS will be more intelligent things to do with electricity than instantly and irreversibly destroying most of its value.
See http://www.tinaja.com/glib/energfun.pdf for a detailed analysis.
Nitpick 101: Hydrogen is not found mostly combined with other elements in nature. In fact it is the most abundant element in the whole universe. (Assuming dark matter is not hydrogen but that is another story.) But for the localized "nature" of the Earth it is almost all found in the water of the planet.
FK
.
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