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Renewable fuels are fuels produced from renewable resources. Examples include: biofuels (e.g. Vegetable oil used as fuel, ethanol, methanol from clean energy and carbon dioxide [1] or biomass, and biodiesel), Hydrogen fuel (when produced with renewable processes), and fully synthetic fuel (also known as electrofuel) produced from ambient carbon dioxide and water.
For comparison, that same one unit of fossil fuel invested in oil and gas extraction (in the lower 48 States) will yield 15 units of gasoline, a yield an order of magnitude better than current ethanol production technologies, ignoring the energy quality arguments above and the fact that the gain (14 units) is both declining and not carbon neutral.
P-series fuels are a family of renewable, non-petroleum, liquid fuels that can substitute for gasoline. The blend of methyl tetrahydrofuran (MTHF), ethanol, and hydrocarbon constitute the P-series fuel. These fuels are clear, high-octane alternative fuels that can be used in flexible fuel vehicles. It addresses 3 problems: the need for non ...
However, unlike traditional gasoline, which are fractionally distilled from crude oil and thus are non-renewable fossil fuels, biogasolines are renewable biofuels made from algal materials, energy crops such as beets and sugarcane, and other cellulosic residues traditionally regarded to as agricultural waste.
Ethanol-blended fuel is widely used in Brazil, the United States, Canada, and Europe (see also Ethanol fuel by country). [2] Most cars on the road today in the U.S. can run on blends of up to 15% ethanol, [6] and ethanol represented 10% of the U.S. gasoline fuel supply derived from domestic sources in 2011. [2]
Carbon-neutral fuel is fuel which produces no net-greenhouse gas emissions or carbon footprint. In practice, this usually means fuels that are made using carbon dioxide (CO 2 ) as a feedstock . Proposed carbon-neutral fuels can broadly be grouped into synthetic fuels , which are made by chemically hydrogenating carbon dioxide, and biofuels ...
The gas can be fermented or chemically synthesised into a range of fuels, including ethanol, synthetic diesel, synthetic gasoline or jet fuel. [ 7 ] There are also lower temperature processes in the region of 150–374 °C, that produce sugars by decomposing the biomass in water with or without additives.
Cellulosic ethanol is an environmentally friendly and renewable transportation fuel that can be produced from forest biomass. Trees are a particularly promising feedstock because they grow all year round, require vastly less fertiliser and water and contain far more carbohydrates (the chemical precursors of ethanol) than food crops do. [ 8 ]