Jet fuels made from renewable sources like biomass and oil are termed renewable jet fuels. Biofuels are the ones which can be renewed as it is consumed. They do not pollute the environment, unlike fossil fuels. The most common source of renewable fuel is plant life which can be used to produce fuel for an aircraft. This can also be used as an alternative to fossil fuels in the long run.
There are three kinds of biofuel sources that are currently being explored for renewable jet fuel in the future. The most prominent among these are ethanol. Biomass and sugar cane are the sources of ethanol, which are considered renewable biofuel because they can be renewed as they are consumed.
Biofuels are produced from the following resources: wood, feedstock, corn, canes, stoves, and bamboo. Types of biofuels that are produced from feedstock are cellulosic ethanol, biodiesel, flex-fuel, non-cellulosic ethanol, and flex-fuel. Most of the ethanol, which is produced is from feedstock resources which are commonly found in agricultural lands. A feedstock is generally used for making ethanol, but some countries use it for making biodiesel, which is popularly known as a green fuel. Biodiesel can also be used in automobiles and trucks, as it can be mixed with gasoline.
Biodiesel is another form of renewable fuel. It is created from the byproducts of the fermentation of sugars and starch. Renewable diesel can be created synthetically, but most of the current diesel is produced using the byproducts of the fermentation of starch and sugar found in sugar canes. The sugars and starch are chemically identical and therefore the resulting fuel will be a blend of both sugars and starch.
Biofuels are used for powering jets in which case we could say that they are in fact, renewable jet fuel. An excellent source of safe renewable jet fuel would be Ethanol. It would not burn as hot as Ethanol (gas) but it is still usable and more importantly, clean-burning. This fuel is made from strawberries, sugar cane, corn, canes, and other agricultural products. This type of aircraft fuel has been around for decades but it was until recently mainly used in light aircraft such as helicopters and gliders.
There are of course many more alternative fuels being considered at the moment including Ethanol, biodiesel, and biogas. This will just be another choice to go with if you are looking to reduce your carbon footprint by using non-conventional fuels in your aircraft. However, one advantage of using any of these alternative fuels is that they will also help to reduce the harmful effects of greenhouse gas emissions.
Various companies are focusing on developing a new generation of aircraft called a bio-hybrid electric air vehicle (HEV). This new system will use a blend of diesel-based jet fuel and a set of specially designed soybean-based hydrogen batteries. By combining these two technologies they believe that they can provide the solutions that both the commercial and defense sectors are looking for.