re: Weekend thoughts: a hydrogen economy

After some searching in early 2017, I learned the following manufacturers are testing FCEVs: Alfa-Romeo, Audi, AvtoVAZ-Lada, Bentley, BMW, FiatChrysler, Ford, General Motors (various divisions), Honda, Hyundai, (both in production now) Jeep, Kawasaki, Kia, London Taxi and Bus Co., Lotus, Mahindra, Maserati, McLaren, Mazda, Mercedes-Benz, Mitsubishi, Morgan, Opel, Peugeot, Porsche, Renault-Nissan, Seat, Skoda, Suzuki, Tata, Toyota, (in production now), Vauxhall, Volkswagen, Volvo + a number of original Chinese automakers (other than joint ventures), as well as bus and truck manufacturers belonging to the Daimler and VW Groups — that is almost every car and bike maker on this planet. With absolute certainty, I missed several, especially in China. — Which one will be the next in a dealership showroom?

FCEVs are the future in transportation; EVs are more expensive to mass-manufacture than fuel cell cars, according to Toyota.

Remember Churchill’s Quote? “A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty.”

LINK the hydrogen car show

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This ain’t it chief. Math is hard. Science is hard. Leave it to the professionals.

Gallon is a defined volume. You can physically fit more pure H2 In that volume than you can N2H4. At the same conditions meaning same phase. Nitrogen will take up space that hydrogen would take up other wise.

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Density of liquid hydrogen: 0.07 g/mL

Density of liquid hydrazine: 1.02 g/mL (0.13 g H/mL, 0.89 g N/mL)

Liquid H2 has a very low density, and hydrazine does indeed contain almost twice as much hydrogen per unit volume. With the added benefit that it doesn’t require cryogenic storage.

OTOH, hydrazine has a higher upper explosive limit (UEL), lower LEL, and lower autoignition temperature than hydrogen. None of these are good things when it comes to storage.

PS,

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Math is hard. Science is hard. Leave it to the professionals.

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