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I think for cars that's probably the case, but that might be too focused on cars. A possible future for it might be for large planes, boats, etc. that would re

I think for cars that's probably the case, but that might be too focused on cars. A possible future for it might be for large planes, boats, etc. that would really need the higher energy density of hydrogen vs batteries. The inefficiency is of course not going to be great, but it means those could possibly use renewable sources (depending on hydrogen production). Or maybe some major battery advancements come before that and make energy density less of an issue ¯\_(ツ)_/¯

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m4rtink 5y ago
Actually the energy density of hydrogen due to its low density and special storage requirements. IMHO synthetic methane or synthetic liquid fuel based od captured CO2 is a better option.
- _fizz_buzz_ 5y ago
  Don't you make these from hydrogen?
  - MisterTea 5y ago
    Yes. https://en.wikipedia.org/wiki/Fischer%E2%80%93Tropsch_process https://en.wikipedia.org/wiki/Fischer%E2%80%93Tropsch_proces...
  - marcosdumay 5y ago
    They are not "hydrogen as a fuel". There a plenty of uses of hydrogen, and they won't stop with electrification. But we probably won't be using them as fuel any time soon (except where its energy density is important enough to override price, flexibility and some safety concerns).
- deleted 5y ago
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- roboticmind 5y ago
  Worth pointing out that the energy may matter more on a per mass basis than strictly per volume in some applications. By looking at MJ/kg, Hydrogen even beats out gasoline[1] although that's not the case for per unit volume[2] Special storage requirements are certainly something to considering especially with high pressures typically involved for gas storage or cryogenic temperatures for liquid. Although it's not as though other fuels have no special storage requirements - it's just that we're used to their complexities [1] 120 MJ/kg for hydrogen versus 44 MJ/kg for gasoline https://www.energy.gov/eere/fuelcells/hydrogen-storage https://www.energy.gov/eere/fuelcells/hydrogen-storage [2] 8 MJ/L for hydrogen vs 32 MJ/L for gasoline

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m4rtink 5y ago

Actually the energy density of hydrogen due to its low density and special storage requirements. IMHO synthetic methane or synthetic liquid fuel based od captured CO2 is a better option.

_fizz_buzz_ 5y ago
Don't you make these from hydrogen?
- MisterTea 5y ago
  Yes. https://en.wikipedia.org/wiki/Fischer%E2%80%93Tropsch_process https://en.wikipedia.org/wiki/Fischer%E2%80%93Tropsch_proces...
- marcosdumay 5y ago
  They are not "hydrogen as a fuel". There a plenty of uses of hydrogen, and they won't stop with electrification. But we probably won't be using them as fuel any time soon (except where its energy density is important enough to override price, flexibility and some safety concerns).
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roboticmind 5y ago
Worth pointing out that the energy may matter more on a per mass basis than strictly per volume in some applications. By looking at MJ/kg, Hydrogen even beats out gasoline[1] although that's not the case for per unit volume[2] Special storage requirements are certainly something to considering especially with high pressures typically involved for gas storage or cryogenic temperatures for liquid. Although it's not as though other fuels have no special storage requirements - it's just that we're used to their complexities [1] 120 MJ/kg for hydrogen versus 44 MJ/kg for gasoline https://www.energy.gov/eere/fuelcells/hydrogen-storage https://www.energy.gov/eere/fuelcells/hydrogen-storage [2] 8 MJ/L for hydrogen vs 32 MJ/L for gasoline