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Ethanol fuel has a "gasoline gallon equivalency" (GGE) value of 1.5, i.e. to replace the energy of 1 volume of gasoline, 1.5 times the volume of ethanol is needed. [4] [5] Ethanol-blended fuel is widely used in Brazil, the United States, and Europe (see also Ethanol fuel by country). [2]
Florida required ethanol blends as of the end of 2010, [39] but has since repealed it. Many cities had separate ethanol requirements due to non-attainment of federal air quality standards. [40] In 2007, Portland, Oregon, became the first U.S. city to require all gasoline sold within city limits to contain at least 10% ethanol.
Much of the current academic discussion regarding ethanol currently revolves around issues of system borders. This refers to how complete a picture is drawn for energy inputs. There is debate on whether to include items like the energy required to feed the people tending and processing the corn, to erect and repair farm fences, even the amount ...
How much ethanol is in gasoline? In 2012, Americans consumed 134 billion gallons of gasoline that contained approximately 13 billion gallons of ethanol (a blend rate of 9.7%), according to the ...
The agency did not provide an estimate of how much ethanol would qualify. The pilot program covers ethanol produced in 2023 and 2024, and will be replaced by a new program in 2025 that biofuel ...
E10, a fuel mixture of 10% anhydrous ethanol and 90% gasoline sometimes called gasohol, can be used in the internal combustion engines of most modern automobiles and light-duty vehicles without need for any modification on the engine or fuel system. E10 blends are typically rated as being 2 to 3 octane numbers higher than regular gasoline and ...
[citation needed] One liter of ethanol releases 21.1 MJ in combustion, a liter of methanol 15.8 MJ and a liter of gasoline approximately 32.6 MJ. 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.
In contrast, ethanol critics [who?] contest the benefits of E85 by focusing on the fact that E85 has 33% lower heating value compared to the higher heating value of gasoline. However comparing energy expressed as a value of heat does not reflect the total work from an Otto Cycle [citation needed].