Abstract
The continuous and rapid development of the aviation industry will result in excessive greenhouse gas emissions and overreliance on conventional fuels. Therefore, the search for alternative aviation fuels has drawn more and more attention from countries around the world. Biojet fuels have been an attractive alternative to aviation fuels because it has the potential to reduce carbon dioxide emissions. A complete life cycle assessment usually requires the construction of the entire product supply chain, which is known as a cradle-to-grave analysis. This chapter summarizes the biomass feedstocks available for aviation fuel and their conversion paths. Next, the technical economic and environmental impact of biojet fuel are reviewed from the perspective of the life cycle. The results show that hydrogenated esters and fatty acids, and Fischer-Tropsch synthesis technology are the most promising biojet fuel production technologies in the near future. At present, the development of biojet fuel still faces some challenges, including the availability, economy of scale, and sustainability of feedstock, which make it unable to be applied on a large scale. It is believed that through more technical research, scientific progress, and policy measures, the application prospects of biojet fuel will become broader.
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