Currently, most of the energy is produced from non-renewable sources. To reduce the need of fossil fuels and the impact on the environment, it is imperative to increase the production and use of sustainable energy. One of the sources of sustainable energy is biomass, from which jet fuel can be produced, called bio-jet-fuel or biokerosene. Biofuels are hydrocarbons obtained from renewable energy sources. They have a similar chemical composition and almost the same characteristics as fossil fuels. Biofuels also solve the problem of emissions in the aviation sector, which have been growing rapidly in the last two decades. Eight procedures for obtaining aviation biofuel have been approved so far. The most commercially developed production process is HEFA, but FT-SPK is also rapidly catching up and has potential advantages, such as flexibility in the use of feedstocks (a wide range of feedstocks, such as agricultural waste or municipal waste, can be used), while the release of greenhouse gasses during this procedure is minimal. The main problems in the large-scale use of renewable aviation fuels are affordability and competitiveness with conventional aviation fuel. This problem could be solved by process intensification, but further research is needed in this area. Good results are also visible in the production of biofuel through the FT process using microreactors, but of course improvements and further research are needed in this process as well.
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