Aviation biofuel is a biofuel used for aircraft. It is considered by some to be the primary means by which the aviation industry can reduce its carbon footprint. After a multi-year technical review from aircraft makers, engine manufacturers and oil companies, biofuels were approved for commercial use in July 2011. Since then, some airlines have experimented with using of biofuels on commercial flights. The focus of the industry has now turned to second generation sustainable biofuels that do not compete with food supplies. Drop-in" biofuels are biofuels that are completely interchangeable with conventional fuels. Deriving "drop-in" jet fuel from bio-based sources is ASTM approved via two routes. The first route involves using oil which is extracted from plant sources like Jatropha, algae, tallows, other waste oils, Babassu andcamelina to produce bio-SPK (Bio derived synthetic paraffinic Kerosene) by cracking and hydroprocessing. The growing of algae to make jet fuel is a promising but still emerging technology. Companies working on algae jet fuel are Solazyme, Honeywell UOP, Solena, Sapphire Energy, Imperium Renewables, and Aquaflow Bionomic Corporation. The second route involves processing solid biomass using pyrolysis to produce pyrolysis oil or gasification to produce a syngas which is then processed into FT SPK (Fischer–Tropsch Synthetic Paraffinic Kerosene). The International Air Transport Association (IATA) supports research, development and deployment of alternative fuels. IATA thinks a 6% share of sustainable 2nd generation biofuels is achievable by 2020, and Boeing supports a target of 1% of global aviation fuels by 2015. This is in support of the goals of the aviation.
§ Developing new sources for aviation biofuels
§ Commercialization of aviation biofuels
§ Applications of aviation biofuels
§ Biobased jet fuel
§ Cost reduction policies
§ Large scale biogas production & challenges
§ Enivronmental protection control (EPC) system