Abstract
The experimental program was designed with design of experiment (DoE) technology and a series of experiments were conducted, then an approximate surface model was established with the experimental results and the significant preparation parameters of hydrous ethanol gasoline with different ethanol proportion were optimized with multi-islands genetic algorithms, then the optimal results were verified. The results show that the ethanol proportion, emulsifier type and proportion in the ethanol gasoline has a great influence on the stability; the phase separation temperature of the hydrous ethanol gasoline prepared with the optimal formula (with 25% ethanol proportion, 1.73% emulsifier S+T) is -8°C which is very close to the predicted value. The fuel can maintain stability and with no phase separate for more than 60 days in the room temperature (10°C-30°C).
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