A gallon of water holds more hydrogen than a gallon of liquid hydrogen
A gallon of water holds about 424 grams of hydrogen. A gallon of liquid hydrogen, chilled to -253 °C, holds about 268. Stan Meyer called water "the safest storage medium for hydrogen that man knows" (Deer Creek, 1985). His other famous number, that hydrogen releases two and a half times the energy o
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A gallon of water holds about 424 grams of hydrogen. A gallon of liquid hydrogen, chilled to -253 °C, holds about 268. Stan Meyer called water "the safest storage medium for hydrogen that man knows" (Deer Creek, 1985). His other famous number, that hydrogen releases two and a half times the energy of gasoline, he credited to the National Bureau of Standards, and per pound it holds up: about 120 MJ/kg for hydrogen against roughly 43 for gasoline, nearly three times. The catch is space: at room pressure it takes about 3,000 gallons of hydrogen gas to match one gallon of gasoline, which is why today's hydrogen cars carry 10,000 psi tanks. Stan's answer was not to store the gas at all, but to store water and make the gas on demand. He was clear that his cell "does not create energy": splitting water costs energy, and how cheaply his cell did it is what builders are still measuring. The tapes and transcripts are on stanslegacy.com.
About the voices. The narrator is NeuralStan, an AI voice the archive uses for its made films. Where you hear Stan Meyer, it is Stan: every word of his is cut from an original recording, and nothing he says was synthesised.
Sources
- Stan Meyer · Deer Creek, Ohio · 1985
- Stan Meyer · evening workshop, probably Denver · 1993
- Stan Meyer · Global Sciences Congress, Orlando, 1992
- Stan Meyer's nine-tube cell · 2008 · © Stan's Legacy
- Stan Meyer, Deer Creek, Ohio, 1985, at 29:20 and 29:29 — transcript on stanslegacy.com
- Stan Meyer, evening workshop, probably Denver, 1993, at 44:17 — transcript on stanslegacy.com
- Stan Meyer, Global Sciences Congress, Orlando, 1992, at 17:44 (the slide shown) — stanslegacy.com
- Hydrogen: lower heating value 120 MJ/kg; 290 Btu per cubic foot at 1 atm and 60 °F; liquid density 70.8 g/L — U.S. DOE Alternative Fuels Data Center, fuel properties comparison
- Gasoline: lower heating value about 112,000–116,000 Btu per gallon (about 43 MJ/kg) — U.S. DOE Alternative Fuels Data Center
- Water is 11.2% hydrogen by mass: 3.785 kg per gallon gives 424 g of hydrogen
shorts stanmeyer hydrogen energy physics waterfuelcell science