billy_tables
billy_tables t1_j0ndmmt wrote
Reply to comment by Cesum-Pec in World’s first net-zero transatlantic flight: Fly London to New York on used cooking oil. Rolls-Royce Trent 1000 engines will power the airline's flagship Boeing 787s as they fly from London to New York in 2023. by Zee2A
You’re saying it takes more fossil fuel emissions to fly this plane from LHR-JFK with plant fuel than it would to fly it with Jet A?
billy_tables t1_j0nbkwb wrote
Reply to comment by thecultcanburn in World’s first net-zero transatlantic flight: Fly London to New York on used cooking oil. Rolls-Royce Trent 1000 engines will power the airline's flagship Boeing 787s as they fly from London to New York in 2023. by Zee2A
jet fuel is carbon dug out of the ground and burned into the atmosphere
plant oils are carbon sucked out of the atmosphere, turned into oil via plants, then put back. So no net new carbon in the atmosphere
billy_tables t1_j0nb57p wrote
Reply to comment by bob0979 in World’s first net-zero transatlantic flight: Fly London to New York on used cooking oil. Rolls-Royce Trent 1000 engines will power the airline's flagship Boeing 787s as they fly from London to New York in 2023. by Zee2A
It's not zero emissions, it's biomass - the carbon was originally captured by the plant material. Exact same as rapeseed oil vehicles, which are carbon neutral
billy_tables t1_j0naxmp wrote
Reply to comment by Cesum-Pec in World’s first net-zero transatlantic flight: Fly London to New York on used cooking oil. Rolls-Royce Trent 1000 engines will power the airline's flagship Boeing 787s as they fly from London to New York in 2023. by Zee2A
By that measure Nuclear is a fossil fuel because of the diesel used to transport it, electricity used to refine it, and concrete used to entomb the waste, and tidal power is a fossil fuel because of the diesel ships that have to deploy and maintain the equipment
It's fair to say the supply chain will have its own carbon footprint, but if burning the fuel only releases carbon that was originally in the atmosphere, that means net zero to me
billy_tables t1_j0mwry1 wrote
Reply to comment by ElJamoquio in World’s first net-zero transatlantic flight: Fly London to New York on used cooking oil. Rolls-Royce Trent 1000 engines will power the airline's flagship Boeing 787s as they fly from London to New York in 2023. by Zee2A
It's ultimately biomass though; plants suck carbon out of the air, then we burn the stuff that we squeeze out of the plants, and return the same carbon back into the air
As opposed to fossil fuels where we suck it out of the ground and burn it into the air
billy_tables t1_j0nhjb5 wrote
Reply to comment by ElJamoquio in World’s first net-zero transatlantic flight: Fly London to New York on used cooking oil. Rolls-Royce Trent 1000 engines will power the airline's flagship Boeing 787s as they fly from London to New York in 2023. by Zee2A
Worse off than not flying - but not worse off than Jet A? There is a 100% reduction in CO2 emissions from the fuel burn, so all that’s left to compare is the fossil fuel consumption of the Jet A and Plant based supply chains.
Those are nothing to do with the fuel itself - in countries with a 100% nuclear energy grid that would be 0. In the U.K. we were 60% renewable today, by the time this fuel is meant to be mainstream here (2050) that will be 100%