The use of sustainable aviation alternative fuels is a key part of the basket of measures under consideration by ICAO Member States to achieve the aspirational goal of stabilizing emissions from international aviation at their 2020 levels.
ICAO is actively engaged in activities facilitating, on a global basis, the promotion and harmonization of initiatives that encourage and support the development of sustainable alternative fuels for international aviation.
Currently 3 pathways for the production of alternative aviation fuel have obtained ASTM approval and are eligible to be blended with conventional jet fuel. The three annexes describing those blending components are as follows:
These fuels are acceptable for use on aircraft and engines that are approved to operate with Jet A or Jet A-1 fuels that meet ASTM D1655 standards. Since June 2011, more than 1,700 commercial flights have been operated using approved aviation alternative fuels. Taking into account its high price difference compared with conventional jet fuel, until now alternative fuels have not been produced in commercial scale.