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A comment on Volvo and Daimler bet on hydrogen truck boom this decade. Parent comment

Re:Volvo and Daimler bet on hydrogen truck boom this decade by xxpor on Wednesday May 12, 2021 @01:27PM (#27132850)
Jet A is really not that combustible; it's very close to diesel/kerosene. If you take a lit match and drop it in a bucket of Jet A, nothing would happen, it'd just burn out. It's way safer than gasoline. It's combustible only when turned into a fine mist.

On the other hand, H2 would have exploded just from the spark of lighting the match.

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Re:Volvo and Daimler bet on hydrogen truck boom this decade by jsight on Wednesday May 12, 2021 @02:11PM (#27133373)
You'd likely get by with dropping the match into gasoline most of the time too. Its not definite that there will be vapor from it in the right mix for it to catch fire before hitting the surface.

Gasoline also isn't quite as combustible as people imagine.

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Re:Volvo and Daimler bet on hydrogen truck boom this decade by nostromo on Wednesday May 12, 2021 @02:32PM (#27133584)
It's worth noting that hydrogen fires burn bright and quickly, but tend to not be very dangerous to people.

Gasoline and batteries are heavy and tend to stick to surfaces (including people) when they burn, almost like napalm. Hydrogen rushes upwards, away from people and surfaces, as it burns, and is generally quickly exhausted.

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Re:Volvo and Daimler bet on hydrogen truck boom this decade by linuxftw on Wednesday May 12, 2021 @02:34PM (#27133596)
I strongly disagree with this statement.
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Re:Volvo and Daimler bet on hydrogen truck boom this decade by jsight on Wednesday May 12, 2021 @02:39PM (#27133643)
I'm not sure what there is to disagree with. Fire around gasoline is dangerous for a number of reasons, but liquid gasoline pooled just isn't as volatile as people imagine.

The vapors are different. See both sides of this coin here: https://www.youtube.com/watch?v=DsZOE1nvlhI

Also, this: https://www.youtube.com/watch?v=vln5-HZpgcA

Don't try this at home. Vapors can change things dramatically and horribly. The videos lightly demonstrate this too, but it can be worse.

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Re:Volvo and Daimler bet on hydrogen truck boom this decade by linuxftw on Wednesday May 12, 2021 @03:00PM (#27133888)
Liquid gasoline without the present of vapor is pretty much nonexistent. Dropping a match into some is going to be a problem.
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Re:Volvo and Daimler bet on hydrogen truck boom this decade by throwaway0a5e on Wednesday May 12, 2021 @02:49PM (#27133771)
In my experience the combustibility of det fuel and similar petroleum products depends primarily on whether the context of the conversation is praising modern safety engineering or heckling someone for using diesel as a cleaning solvent.
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Re:Volvo and Daimler bet on hydrogen truck boom this decade by jandrese on Wednesday May 12, 2021 @10:00PM (#27137611)
It would be more dangerous when spread over a large surface and allowed to vaporize.
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