You’d need huge cryogenic tanks due to the volume density of hydrogen over kerosene. Good for rockets that you can jettison tanks from, but less so for planes. I just don’t see it ever being practical for aviation over just creating our own hydrocarbons out of something else. Either catalyst based or otherwise. That’s potentially carbon neutral as well.
Even if it takes more space, there are still benefits over biofuels.
The hydrogen can be created using electricity. Currently it is not very efficient, but only uses electricity and water.
Electricity can come from de carbonated (/low carbon) sources.
And a fuel cell will use that hydrogen to generate electricity by combining the hydrogen into water with outside oxygen.
For the biofuel, it’s a big climate hoax.
The issue with bio fuels, is that the energy required to produce them is huge. It required bacteria producing carbon emissions, and the fuel also produced carbon emissions. Whatever entered that plan, will get out, and even more because of the transformation.
(i don’t remember which video from Undecided with Matt Ferell was about biofuels).
Tho maybe it could be used for something. To get slightly less carbon emissions than with normal fuel.
There may also be a solution with batteries. However the energy density for them is lower compared to hydrogen. Tho, there may be some battery innovation I saw passing by which could be pretty interesting.
The difference is the ‘L’ in LPG. It turns liquid at a relatively low pressure and takes up much less space then. Hydrogen does not do that, so it has to be stored at a much, much higher pressure. For example, a medical oxygen bottle or a scuba tank has around 200 atm of pressure. For cars, hydrogen is usually stored at 700 atm. And the pressure inside an LPG tank is around 8 atm at room temperature.
As someone from Germany that’s the first time in reading that it was ever a thing for trains
Pretty much all our rails have electric lines on top and most trains are working electrically already
I really don’t see a point to waste hydrogen on cars or trains where pure electricity is working fine
Planes seems to be the main target that absolutely will never work electrically so it needs hydrogen - there even was an article about a ship running on batteries a couple of days ago
You’d need huge cryogenic tanks due to the volume density of hydrogen over kerosene. Good for rockets that you can jettison tanks from, but less so for planes. I just don’t see it ever being practical for aviation over just creating our own hydrocarbons out of something else. Either catalyst based or otherwise. That’s potentially carbon neutral as well.
Edit: my comment, but with numbers https://pubs.aip.org/physicstoday/article/74/9/11/928294/Hydrogen-as-an-aviation-fuel It’s not a problem with how heavy the fuel would be or how much space they’d take. It’s how heavy the damn tanks would need to be.
Even if it takes more space, there are still benefits over biofuels.
The hydrogen can be created using electricity. Currently it is not very efficient, but only uses electricity and water. Electricity can come from de carbonated (/low carbon) sources.
And a fuel cell will use that hydrogen to generate electricity by combining the hydrogen into water with outside oxygen.
For the biofuel, it’s a big climate hoax. The issue with bio fuels, is that the energy required to produce them is huge. It required bacteria producing carbon emissions, and the fuel also produced carbon emissions. Whatever entered that plan, will get out, and even more because of the transformation. (i don’t remember which video from Undecided with Matt Ferell was about biofuels). Tho maybe it could be used for something. To get slightly less carbon emissions than with normal fuel.
There may also be a solution with batteries. However the energy density for them is lower compared to hydrogen. Tho, there may be some battery innovation I saw passing by which could be pretty interesting.
It’s no more of a problem than dealing with LPG, surely? Pressurise it for storage.
The difference is the ‘L’ in LPG. It turns liquid at a relatively low pressure and takes up much less space then. Hydrogen does not do that, so it has to be stored at a much, much higher pressure. For example, a medical oxygen bottle or a scuba tank has around 200 atm of pressure. For cars, hydrogen is usually stored at 700 atm. And the pressure inside an LPG tank is around 8 atm at room temperature.
I think it is, not sure but it requres bigger pressure and hidrogen is smallest atom that escapes even from high presure tanks.
You can’t keep liquid hydrogen by pressure alone and even as a liquid it’s volume density it’s very low compared to other liquids.
There was an article around here about Germany ditching hydrogen for their trains, which, if justifiable, seems damning for anything in the air.
As someone from Germany that’s the first time in reading that it was ever a thing for trains
Pretty much all our rails have electric lines on top and most trains are working electrically already
I really don’t see a point to waste hydrogen on cars or trains where pure electricity is working fine
Planes seems to be the main target that absolutely will never work electrically so it needs hydrogen - there even was an article about a ship running on batteries a couple of days ago