▲ 268 ▼ Hydrogen vehicles in Denmark left without fuel as all commercial refuelling stations shuttered (www.hydrogeninsight.com) submitted 2 years ago by fne8w2ah@lemmy.world to c/world@lemmy.world 81 comments fedilink hide all child comments
[–] joel_feila@lemmy.world 1 point 2 years ago (1 child) Wait getting in the car is more complex? permalink fedilink source parent hideshow 2 child comments replies: [–] night_of_knee@lemmy.world 1 point 2 years ago* (2 children) I hadn't thought of it before but it's obvious, hydrogen is a gas at room temperature, it had to be stored under pressure in order to get any significant mass into the volume of a tank. So it's under pressure in the refueling station and in the car's tank. How does it get from one to the other without boiling away? permalink fedilink source parent hideshow 4 child comments replies: [–] supercriticalcheese@feddit.it 2 points 2 years ago Hydrogen is a gas, under very high pressure but you will never find it in a liquid form unless you cool it down to -250 C or so. It's not used in liquid form for such applications. There is though the need to chill the hydrogen to about -20/-40C before delivery to the vehicles due to some anomalous properties of hydrogen respect to ever other gas known to humans. permalink fedilink source parent [–] joel_feila@lemmy.world 2 points 2 years ago oh there are a few ways. One group is researching turning H2 into a paste. the paste mixes with water and breaks down into water and Ca+ ions. You now have a energy density around liquid hydrogen and it only add some calcium to the exhaust. There is also storing hydrogen in metal disks. permalink fedilink source parent
[–] night_of_knee@lemmy.world 1 point 2 years ago* (2 children) I hadn't thought of it before but it's obvious, hydrogen is a gas at room temperature, it had to be stored under pressure in order to get any significant mass into the volume of a tank. So it's under pressure in the refueling station and in the car's tank. How does it get from one to the other without boiling away? permalink fedilink source parent hideshow 4 child comments replies: [–] supercriticalcheese@feddit.it 2 points 2 years ago Hydrogen is a gas, under very high pressure but you will never find it in a liquid form unless you cool it down to -250 C or so. It's not used in liquid form for such applications. There is though the need to chill the hydrogen to about -20/-40C before delivery to the vehicles due to some anomalous properties of hydrogen respect to ever other gas known to humans. permalink fedilink source parent [–] joel_feila@lemmy.world 2 points 2 years ago oh there are a few ways. One group is researching turning H2 into a paste. the paste mixes with water and breaks down into water and Ca+ ions. You now have a energy density around liquid hydrogen and it only add some calcium to the exhaust. There is also storing hydrogen in metal disks. permalink fedilink source parent
[–] supercriticalcheese@feddit.it 2 points 2 years ago Hydrogen is a gas, under very high pressure but you will never find it in a liquid form unless you cool it down to -250 C or so. It's not used in liquid form for such applications. There is though the need to chill the hydrogen to about -20/-40C before delivery to the vehicles due to some anomalous properties of hydrogen respect to ever other gas known to humans. permalink fedilink source parent
[–] joel_feila@lemmy.world 2 points 2 years ago oh there are a few ways. One group is researching turning H2 into a paste. the paste mixes with water and breaks down into water and Ca+ ions. You now have a energy density around liquid hydrogen and it only add some calcium to the exhaust. There is also storing hydrogen in metal disks. permalink fedilink source parent