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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]
Comparing 2008 to 2003, Alan Tiemann of Seward, a Nebraska Corn Board member, said that ethanol plants produce 15 percent more ethanol from a bushel of corn and use about 20 percent less energy in the process. At the same time, corn growers are more efficient, producing more corn per acre and using less energy to do so. [4]
The addition of ethanol to gasoline reduces the net greenhouse gases released by an average of 34%. [12] One bushel of corn can produce 2.8 gallons of ethanol in as well as 17-18 pounds of DDGS. [13] Compared to other major sources, corn is the least efficient means of ethanol production. In 2007, the production process used 75% of the energy ...
The price for corn has skyrocketed to more than $7 a bushel (which, by the way, is close to its all-time high), and the worldwide buffer supply of Genetically Modified Corn for Ethanol Fuel Could ...
Since the 1970s, the U.S. has subsidized ethanol produced from food crops, especially from corn, thus providing a homegrown, alternative fuel source for our automobiles. But for multiple reasons ...
The 54-cents-a-gallon tariff, coupled with the 45-cents-a-gallon corn subsidy, effectively cut 99 cents from the price of every gallon of ethanol produced, making American corn ethanol far more ...
Using corn as a feedstock to produce either ethanol or butanol seems infeasible without significant technology improvements regarding yields. Currently, about 2.5 US gallons (9.5 L) of butanol can be produced per bushel of corn (373 l/t). [44] Meanwhile, about 2.75 US gallons (10.4 L) of ethanol can be produced per bushel of corn (410 l/t). [45]
During the 2008 financial crisis corn prices, fell 50% from their July 2008 high by October 2008, in tandem with other commodities, including oil, while corn ethanol production continued unabated. "Analysts, including some in the ethanol sector, say ethanol demand adds about 75 cents to $1.00 per bushel to the price of corn, as a rule of thumb.