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Old 10-01-2008, 05:25 AM   #4 (permalink)
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The big problem with corn ethanol is the amount of energy it takes to distill it to fuel grade. Another more pressing problem is dealing with the Acrolein gas given off during distillation. (Note Acrolein gas was used as a chemical weapon in WW1)

Since biodiesel is based off of oils it doesn't need to be distilled which give it a decisive advantage on energy return.
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