The high alcohol level in flex fuel pulls the water into the fuel and holds it tightly. Pure alcohol and water will mix to form a clear uniform solution in all concentrations. North American fuels contain only about 10% alcohol, so most of the fuel is hydrocarbon. A small amount of water will mix clearly into the alcohol and be held within the fuel, but as the water percentage increases, the alcohol-water mixture becomes less soluble in the fuel and forms a separate layer.
Brazilian flex fuels gasoline and alcohol with several content mixtures doesn't phase separate. Why would NA fuels do? What lacks on former fuels to phase separate, ketones? Print
Modified on: Sat, 10 Aug, 2019 at 6:39 AM
Did you find it helpful? Yes NoSend feedback
Sorry we couldn't be helpful. Help us improve this article with your feedback.