Alternative Fuels: Questions and Answers

​4. WHICH ALTERNATIVE FUELS CAN CURRENTLY BE USED?

 
Any fuel used in aviation must previously be approved against international standards. Five alternative fuel pathways have already been approved for blending with conventional jet fuel and sixteen additional pathways are currently under review, as of August 2016.
 
Significant experience has been acquired with alternative fuels through experimental flights and through numerous commercial flights since July 2011. 
 
However, industrial production is in an early stage and the commercial availability of the fuels is currently limited.
 
  • Which fuels are approved today?

  • Why is there a maximum blending ratio for currently approved alternative fuels?

  • What is the current experience with flying on alternative fuels?

  • What is the current commercial availability of alternative fuels?

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