Commercial civil aviation accounts for roughly 2.5% of global carbon emissions. Explore certified drop-in synthetic fuels, electric hybrid commuter airliners, and hydrogen combustion prototypes paving the path toward net-zero 2050.
Drop-in synthetic kerosene alternatives certified under ASTM D7566 standard specifications for commercial flight.
The most established SAF pathway. Waste lipids are deoxygenated, hydrocracked, and isomerized into high-energy drop-in synthetic kerosene that flows through standard airport fuel hydrant networks.
The ultimate scalable solution for sustainable aviation. Produces drop-in hydrocarbon chains without consuming arable agricultural land or food-competing biomass.
Dehydrates alcohols to olefins, oligomerizes them into longer carbon chains, and hydrotreats them into aviation kerosene.
Gasifies household trash or wood chips into synthesis gas (carbon monoxide and hydrogen), then synthesizes kerosene through catalytic Fischer-Tropsch reactors.
Clean-sheet commercial transport concepts bypassing fossil hydrocarbons through cryogenic liquid hydrogen and battery-electric powertrains.
Twin-turboprop concept powered by modified gas turbines burning cryogenic liquid hydrogen stored in pressurized cryogenic fuselage tanks. Designed for short-haul regional flying with zero in-flight CO₂ emissions.
Transcontinental aircraft design powered by modified high-bypass turbofan engines running on liquid hydrogen, featuring rear-fuselage cryogenic tanks behind the passenger cabin pressure bulkhead.
Regional hybrid-electric airliner with four electric motors. Flies 200 km on pure zero-emission battery power, extendable to 400 km using reserve SAF turbogenerators.
Replaces conventional turboprop engines with 2-5 megawatt hydrogen-electric powertrains, extracting electricity from fuel cells to turn high-efficiency composite propellers with only water vapor exhaust.
Conventional Jet-A kerosene packs approximately 43 megajoules per kilogram (MJ/kg). Modern lithium-ion batteries deliver less than 1 MJ/kg. For long-haul transoceanic flight, battery weight alone exceeds aircraft takeoff limits, making drop-in liquid hydrocarbons (like SAF) the only viable near-term decarbonization pathway.
Liquid hydrogen delivers an incredible 120 MJ/kg (nearly triple jet fuel), but requires 4 times the volumetric storage space and must be maintained at -253°C (-423°F) in insulated cylindrical fuselage pressure vessels, reducing passenger cabin seating space.
Airlines also target operational efficiency: carbon-composite wings (Boeing 787, Airbus A350), split-scimitar and sharklet wingtip devices that eliminate drag-inducing vortices, single-engine taxiing, and Continuous Descent Operations (CDO) that throttle down engines on approach.