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energy directly consumed to make the ethanol is renewable energy. The farm equipment and ethanol plant use an ethanol engine, biodiesel, air engine or electricity cogenerated during ethanol production, or even wind power and solar energy. energy indirectly consumed is, as much as possible, renewable.
The total amount of energy input into the process compared to the energy released by burning the resulting ethanol fuel is known as the energy balance (or "energy returned on energy invested"). Figures compiled in a 2007 report by National Geographic [ 68 ] point to modest results for corn ethanol produced in the US: one unit of fossil-fuel ...
The steep growth in twenty-first century ethanol consumption was driven by federal legislation aimed to reduce oil consumption and enhance energy security. The Energy Policy Act of 2005 required use of 7,500,000,000 US gal (2.8 × 10 10 L) of renewable fuel by 2012, and the Energy Independence and Security Act of 2007 raised the standard, to ...
One major drawback with corn ethanol, is the energy returned on energy invested , meaning the energy outputted in comparison to the energy required to output that energy. Compared to oil, with an 11:1 EROI, corn ethanol has a much lower EROI of 1.5:1, which, in turn, also provides less mileage per gallon compared to gasoline. [7]
In other words, for the same energy content as one liter or one gallon of gasoline, one needs 1.6 liters/gallons of ethanol and 2.1 liters/gallons of methanol. The raw energy-per-volume numbers produce misleading fuel consumption numbers, however, because alcohol-fueled engines can be made substantially more energy-efficient.
US energy consumption in 2023 [1] ... The Energy Policy Act of 2005 mandated an increased use of ethanol. [49] Most gasoline sold in the US contains up to 10% ethanol.
The energy content of ethanol is 76,100 BTU/US gal (5.89 kilowatt-hours per litre), compared to 114,100 BTU/US gal (8.83 kWh/L) for gasoline. (see chart above) A flex-fuel vehicle will experience about 76% of the fuel mileage MPG when using E85 (85% ethanol) products as compared to 100% gasoline. Simple calculations of the BTU values of the ...
The vehicles' diesel engines will use ethanol. [80] In order to achieve a broader use of biofuels several government incentives were implemented. Ethanol, as the other biofuels, were exempted of both, the CO 2 and energy taxes until 2009, resulting in a