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Strategies & Market Trends : The Epic American Credit and Bond Bubble Laboratory
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To: 2sigma who wrote (106593)12/12/2009 6:33:30 PM
From: Gib Bogle  Read Replies (1) of 110194
 
Extracting H2 from water by electrolysis:

2H20 + energy1 => 2H2 + O2

Recombining H2 with atmospheric oxygen:

2H2 + O2 => 2H2O + energy2

Of course, the usable fraction of energy2 will be less than energy1.

As I understand it, although H2 is completely non-polluting (because burning it gives only water), it has two disadvantages. Extremely high pressure must be used to get the energy density up to a reasonable level, and because H2 molecules are so small they tend to leak out of the tiniest holes. This creates safety concerns.
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