Environment & Energy
Related: About this forumAmerican Airlines Bets Big on Zero-Emission Future with ZeroAvia Hydrogen-Electric Engine Deal

American Airlines Bets Big on Zero-Emission Future with ZeroAvia Hydrogen-Electric Engine Deal
USTourismNews.com | Iuliia Tore | Jul 24, 2025
American Airlines has announced a conditional purchase agreement for 100 hydrogen-electric engines from clean aviation leader ZeroAvia, designed to power regional jets with zero in-flight emissions save for water vapor. The deal signals one of the strongest commitments yet by a major airline to alternative propulsion and aligns with Americans goal of achieving net-zero greenhouse gas emissions by 2050.
The agreement builds on a Memorandum of Understanding signed in 2022, and coincides with Americans increased investment in ZeroAvia through participation in the companys Series C funding round.
A New Era of Clean Regional Aviation
ZeroAvia is at the forefront of developing hydrogen-electric propulsion systems, which generate electricity from hydrogen fuel cells to power electric motorsproducing only water vapor as a by-product. The company is currently flight-testing a 20-seat prototype and is actively designing a larger engine for aircraft such as the Bombardier CRJ700, a model used by American on select regional routes.
This announcement will help accelerate the development of technologies needed to power our industry and uphold our commitment to make American a sustainable airline, said Robert Isom, CEO of American Airlines. Advancing the transition of commercial aviation to a low-carbon future requires investments in promising technologies, including alternate forms of propulsion.
Investing in a Greener Flight Path...more
https://www.rustourismnews.com/2025/07/24/american-airlines-bets-big-on-zero-emission-future-with-zeroavia-hydrogen-electric-engine-deal/

ZeroAvia
Hydrogen-electric and electric propulsion technology for clean, efficient and affordable flight.
ZeroAvia is developing full hydrogen-electric engines for existing commercial aircraft and also supplying hydrogen and electric propulsion component technologies for novel battery, hybrid and hydrogen-electric air transport applications.
ZeroAvia
This Isnt an Aircraft, Its a Revolution: American Airlines Triggers Aviation Uproar With Game-Changing Project Set to Redefine Flight
https://www.energy-reporters.com/environment/this-isnt-an-aircraft-its-a-revolution-american-airlines-triggers-aviation-uproar-with-game-changing-project-set-to-redefine-flight/
American Airlines and ZeroAvia: "F*ck Trump"

OKIsItJustMe
(21,508 posts)The classic example (in my mind) is the Saturn V. The top stages of the Saturn V were powered by hydrogen/oxygen. Electricity was provided by fuel cells, which also produced fresh water as a byproduct. Hydrogen was chosen, primarily for its energy/mass ratio.
However, the 1st stage of the Saturn V used RP-1/oxygen. (RP-1 is essentially highly refined kerosene.) RP-1 was used for the first stage because of its high energy/volume ratio.
If you go back to the 1970s NOVA documentary, The Invisible Flame, a pair of aircraft engineers are predicting that hydrogen will be the future of commercial aviation. They explain how they propose to modify jetliners to accommodate hydrogen fuel.
4th
(340 posts)Producing it requires a lot of energy.
Getting it out of methane (one common method) releases a lot of CO2.
OKIsItJustMe
(21,508 posts)Today, most hydrogen (as you point out) is produced from methane (Natural Gas) for the simple reason that its the cheapest way to do it. Weve been doing it that way for a long time, but, weve also known how to produce it using electrolysis.
So, heres the thing, producing electricity using renewable sources of energy, like wind and solar is getting cheaper and cheaper, while the price of natural gas will go up. When Russia invaded Ukraine, Natural Gas prices jumped, making green hydrogen cost competitive.
When electrolysis becomes reliably less expensive than steam reforming of Natural Gas the market will naturally shift.
hatrack
(63,135 posts)