Electronic grade Sustainable Aviation Fuel(eSAF)is an emerging direction for the aviation industry to achieve carbon dioxide emission reduction,in addition to traditional biomass-based Sustainable Aviation Fuel(SAF).It primarily utilizes green hydrogen produced through renewable energy electrolyzing water,combined with renewable carbon dioxide.This combination undergoes processes such as Fischer-Tropsch synthesis(FT),methanol synthesis,and direct synthesis to ultimately produce aviation fuel fractions.From an economic perspective,the production cost of eSAF is mainly determined by the cost of green hydrogen,currently estimated at around RMB24 per liter,which is higher than traditional fossil aviation fuel and bio-based aviation fuel.At present,eSAF faces various challenges,including the availability of raw materials,high production cost,sustainability,and geographical matching.Although eSAF encounters several technical and economic challenges in a short term,gradual improvements in competitiveness can be achieved through policy support and technological advancement,paving the way for the potential replacement of traditional aviation fuels and contributing to the global aviation industry's carbon-neutral goals.
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