4 ms·
> I doubt there’s a reasonable way to capture jet exhaust, and even if it did it would increase the weight of the aircraft. Just taking it with you is a non-st
by Schroedingersat 4y ago
> I doubt there’s a reasonable way to capture jet exhaust, and even if it did it would increase the weight of the aircraft.
Just taking it with you is a non-starter.
If your fuel is mostly carbon by weight, then the CO2 will weigh 2-3x as much. At that point batteries are starting to look appealing by comparison. There are battery techs with around 400Wh/kg and various almost-working ideas in the 500-600 region. Once you run 11000Wh/kg hydrocarbons through a turbine at 30% and carry the 2 Oxygen atoms for every C you might only be getting 1000Wh per kg of exhaust you carry.
- myblake 4y agoDoes commercial aviation carry an oxidizer though? I thought jets were air breathing.
- londons_explore 4y agoOP's point is that if they wanted to capture the exhaust, then they would be carrying the oxidizer...
- Schroedingersat 4y agoYou are correct. I was speaking of the exhaust which is oxidised (that is, after all why you burn the fuel). If you wanted to do CCS on a jet the H2O can be vented, but the CO2 (which you have to carry to your destination) weighs 44/12 times the carbon in the fuel (which is a large portion of the fuel mass -- abput 3/4ths iirc).