United and Honeywell have announced a joint multimillion-dollar investment in Alder Fuels – a cleantech company that is pioneering first-of-its-kind technologies for producing sustainable aviation fuel (SAF) at scale by converting abundant biomass, such as forest and crop waste, into sustainable low-carbon, drop-in replacement crude oil that can be used to produce aviation fuel. When used together across the fuel lifecycle, the Alder technologies, coupled with Honeywell’s Ecofining™ process, could have the ability to produce a carbon-negative fuel at spec with today’s jet fuel. The goal of the technologies is to produce fuel that is a 100% drop-in replacement for petroleum jet fuel.
As part of the agreement, United is committing to purchasing 1.5 billion gallons of SAF from Alder when produced to United’s requirements. United’s purchase agreement, which is one-and-a-half-times the size of the known purchase commitments of all global airlines combined, makes this easily the largest publicly announced SAF agreement in aviation history. United’s purchase agreement with Alder also surpasses the previous record set by the airline in 2015 through its investment in Fulcrum BioEnergy with its option to purchase up to 900 million gallons of SAF.
“Since announcing our 100% green commitment in 2020, United has stayed focused on decarbonizing without relying on the use of traditional carbon offsets. Part of that commitment means increasing SAF usage and availability since it’s the fastest way to reduce emissions across our fleet. However, to scale SAF as quickly as necessary, we need to look beyond existing solutions and invest in research and development for new pathways like the one Alder is developing,” said United CEO Scott Kirby. “United has come further than any other airline making sustainable travel a reality by using SAF to power flights. Our leadership gives customers confidence that they are flying with an airline that recognizes the responsibility we have to help solve climate change.”
According to the U.S. Department of Energy (DOE), U.S. forestry residues and agricultural residues alone could provide enough biomass energy to generate more than 17 billion gallons of jet fuel and displace 75% of U.S. aviation fuel consumption. If the U.S. were to broadly adopt regenerative agricultural practices, which capture more carbon in healthier soil compared to traditional methods, the U.S. could generate an additional seven billion gallons of SAF, which would completely replace the U.S.’s current fossil jet fuel consumption.
