The different gasoline’s impression on emissions is dependent upon how it’s produced and the way a lot of it’s in the end utilized in flight. Today, SAF is normally blended with conventional petroleum-based fuels and dropped into present airplane engines. Neste claims its SAF can scale back the life-cycle emissions of a flight by as much as 80 %.
In whole, 24.5 million gallons of SAF have been used within the U.S. in 2023 — rather more than the 12 months earlier than, however a small quantity in contrast with the general U.S. jet gasoline use of roughly 69.3 million gallons each day.
Still, SAF is choosing up steam. In late July, JetBlue introduced a business settlement with Valero Energy to obtain its first common provide of blended SAF at John F. Kennedy International Airport in New York later this 12 months. The deal seeks to carry not less than 1 million gallons of the gasoline to JFK, with an possibility of shopping for a further 4 million gallons over a span of 12 months. On prime of that, Virgin Atlantic final 12 months accomplished the primary worldwide flight powered fully by SAF, a journey from London Heathrow to New York City’s JFK.
United has been ramping up its SAF efforts in recent times.
In December 2021, United flew greater than 100 vacationers from Chicago O’Hare to Reagan National Airport in Washington, D.C., utilizing 100 % kerosene-free SAF — it claims this was the primary passenger flight powered by SAF alone.
Just a few months later, United agreed to buy as much as $52.2 hundreds of thousands of SAF from Neste over the subsequent three years for flights at Amsterdam’s Schiphol Airport and “probably extra airports,” like O’Hare. The following 12 months, United introduced it might begin utilizing SAF in flights departing from San Francisco International Airport and London Heathrow, placing the airline on observe to burn 10 million gallons of SAF by the tip of 2023.
Looking forward, state and federal subsidies for low-carbon jet gasoline might assist the airline proceed increasing its SAF efforts at O’Hare, in keeping with a spokesperson. United is combining Illinois’ SAF tax credit with federal incentives from the Inflation Reduction Act.
Still, the gasoline stays costlier than typical jet gasoline, and provides are restricted. Further adoption can be held again by regulation. One instance is the ASTM D7566, a voluntary international jet gasoline customary that restricts airways from utilizing a gasoline mix composed of greater than 50 % SAF to make sure compatibility with present jet infrastructure.
Ultimately, regardless of United’s progress on adopting low-carbon fuels, solely 0.1 % of its total gasoline use at the moment comes from SAF, in keeping with the corporate.
In different phrases, as Wilkin put it, “there’s nonetheless a lengthy method to go.”