TheLivingShadow
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hydrogen
Ferrosilicon is used by the military to quickly produce hydrogen for balloons by the ferrosilicon method. The chemical reaction uses sodium hydroxide, ferrosilicon, and water. The generator is small enough to fit a truck and requires only a small amount of electric power, the materials are stable and not combustible, and they do not generate hydrogen until mixed.[1] The method has been in use since World War I. A heavy steel pressure vessel is filled with sodium hydroxide and ferrosilicon, closed, and a controlled amount of water is added; the dissolving of the hydroxide heats the mixture to about 200 °F and starts the reaction; sodium silicate, hydrogen and steam are produced. After the cylinder cools and the steam condenses, hydrogen is drained and the glassy sodium silicate is scraped from the cylinder; the cleaning is a laborious operation, taking a soldier an entire day.
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8/4/2011, 3:20 pm
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TheLivingShadow
Location: Morocco
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Nocera's Co-OEC Electrolyzer
In this talk by MIT professor Dan Nocera he goes into his development of a less-efficient but cheap energy alternative what produces hydrogen and distilled water out of any (polluted) water source.
Also see: Catalyst heralded as solar-power breakthrough
They applied a current to an electrode sitting in a beaker of water that contained doubly-charged cobalt ions (Co2+) and phosphate ions (PO43-) in solution. The Co2+ ions are very soluble, but they are oxidized by the electrode into insoluble Co3+ ions, which stick to the electrode, and likely lose another electron to become Co4+.
When the electrode is turned off, the catalyst starts to redissolve, as Co4+ and Co+3 turn into soluble Co2+.
Last edited by TheLivingShadow, 2/22/2012, 1:04 pm
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2/22/2012, 1:03 pm
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