Improvement of solar ethanol distillation using ultrasonic waves
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Abstract
This report presents a study on the use of ultrasonic waves in solar ethanol distillation to investigate their performance at a frequency of 30 kHz and a power of 100 Watts in the inlet of a 10-litre distillation tank. Based on a non-continuous distillation process (batch distillation), the experiment demonstrated that using ultrasonic waves in solar ethanol distillation increased the average concentration of distilled ethanol compared to a system without this technology. Ultrasonic waves were able to enhance the separation of ethanol from the solution (water-ethanol mixture) during solar distillation. The amount of pure ethanol produced from each distillation batch using this technology was greater when the initial concentration of ethanol was lower than 50%v/v (% by volume). An average of approximately 40% and 20% were obtained for initial ethanol concentrations of 10%v/v and 30%v/v, respectively. Furthermore, the distillation rate varied with the amount of solar irradiation.
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