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 POWER-TO-LIQUID: TOWARDS A NEUTRAL EMISSIONS FUEL?
■ Another, highly promising drop-in option would use synthetic fuels. Instead of refining increasingly scarce fossil fuels, which also emit CO2, this technology produces a liquid fuel using a “green” electrosynthesis process (power-to-liquid). This offers a new way of producing hydrocarbons from hydrogen in water and captured carbon from the atmosphere. Power-to-liquid is a promising path to make a totally CO2 neutral fuel (it emits only the carbon that was previously captured in the environment), provided of course that the electricity needed for production is generated by carbon-free sources (solar, wind, nuclear, etc.), and that the source of the CO2 used as a raw material is carefully controlled.
■ Small, highly experimental refineries of this type already exist. But they harbor real potential, provided there is sufficient investment in research and the development of industrial-scale production. Starting in about 2030, power-to-liquid could well emerge as an effective response to meet the large-scale needs of a decarbonized aviation industry.
Safran is already working
on ultra-optimized future-generation engines that could run on up to
  100% sustainable aviation fuels (SAF)





























































































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