There are two ways to convert a fatty acid to a volatile fuel: you can convert it to an ester or an alkane. Biodiesel is comprised of esters; biokerosene is mad

There are two ways to convert a fatty acid to a volatile fuel: you can convert it to an ester or an alkane. Biodiesel is comprised of esters; biokerosene is made of alkanes. Converting fats to biodiesel is a much simpler process, which is why biodiesel is common and biokerosene has yet to take off -- currently, biokerosene is made by hydrogenation, and hydrogen usually comes from fossil fuels. This is described here: https://www.researchgate.net/profile/Ulf_Neuling/publication/269290472_Conversion_routes_for_production_of_biokerosene-status_and_assessment/links/57ecd5b908ae92eb4d266cfc.pdf https://www.researchgate.net/profile/Ulf_Neuling/publication... The most land-efficient way to produce fats from crops is by far the palm oil fruit ( http://journeytoforever.org/biodiesel_yield.html http://journeytoforever.org/biodiesel_yield.html ), but because most cropland is already used for growing food, most palm oil plantations are on recently cleared forest, which gives palm oil an undeservedly bad reputation (farmers in Southeast Asia would simply grow something else on cleared forest if not for oil palms).