Perspective: US Needs to Transition to Hydrous Ethanol as the Primary Renewable Transportation Fuel
Green Car Congress
AUGUST 30, 2009
d) further provides for alcohol blends as follows: Special provisions for alcohol blends. (1) Hydrous ethanol (also sometimes known as azeotropic ethanol) typically ranges from 186 proof (93% ethanol, 7% water) to 192 proof (96% ethanol, 4% water). As used in this section and Sec. 40 CFR ยง 80.27(d) Conclusion.
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