wxman
Veteran Member
YOU said in post #50 that aviation consumes ~13 billion gallons/year. Now you're saying it's 36 billion gallons/year. Which is it?
Do you have a source for the ~440B gallons of liquid fuel/year consumed in the U.S.? According to EIA ( https://www.eia.gov/energyexplained/index.cfm?page=oil_home#tab3 ), petroleum consumption in the U.S. is 19,631,000 barrels/day. 71% of that is for transportation. That would be ~215 billion gallons/year for transportation if my math is correct.
Potential yield from just a few waste feedstocks (used cooking oil, DME from vegetation that will be burned anyway, and renewable diesel fuel from MSW) would approach 40 billion gallons (diesel equivalent) per year. That's almost 20% just from those sources. That doesn't include the reduction in fuel consumption from diesel vehicles relative to the mostly gasoline passenger vehicle fleet in the U.S.
If EVs take up a large percentage of personal passenger vehicles, then that substantially lowers the liquid fuel demand for transportation.
I mentioned DME from biomass because it has the greatest potential reduction in GHG emissions (net uptake) of any vehicle technologies/fuel pathways currently calculated in GREET.
It doesn't need to be an either/or scenario. Biofuels can compliment electricity for transportation.
Do you have a source for the ~440B gallons of liquid fuel/year consumed in the U.S.? According to EIA ( https://www.eia.gov/energyexplained/index.cfm?page=oil_home#tab3 ), petroleum consumption in the U.S. is 19,631,000 barrels/day. 71% of that is for transportation. That would be ~215 billion gallons/year for transportation if my math is correct.
Potential yield from just a few waste feedstocks (used cooking oil, DME from vegetation that will be burned anyway, and renewable diesel fuel from MSW) would approach 40 billion gallons (diesel equivalent) per year. That's almost 20% just from those sources. That doesn't include the reduction in fuel consumption from diesel vehicles relative to the mostly gasoline passenger vehicle fleet in the U.S.
If EVs take up a large percentage of personal passenger vehicles, then that substantially lowers the liquid fuel demand for transportation.
I mentioned DME from biomass because it has the greatest potential reduction in GHG emissions (net uptake) of any vehicle technologies/fuel pathways currently calculated in GREET.
It doesn't need to be an either/or scenario. Biofuels can compliment electricity for transportation.