抄録
The effect of operating pressure on ethanol separation from mixtures of ethanol and water through ultrasonic atomization was investigated. Ultrasound of 2.4MHz was irradiated to 27mol% ethanol aqueous solution in atomization tank under reduced pressure. The mixture of produced mist, droplet and vapor was brought out with a pump and fed to the collection tank at a higher pressure. To maintain a constant operating pressure and also to bring the mixture, carrier gas was supplied to the atomization tank. Inside of the collection tank was cooled at -20 degree C to enhance the condensation. Collection of the mixture of mist, droplet and vapor was successful by pressurizing and cooling. Weight of the collected sample with ultrasonic atomization was larger than that for without atomization. The difference between with and without ultrasound corresponds to the sum of droplets and vapor occurred form liquid fountains. Ethanol concentration in the collected liquid under ultrasonic atomization was higher than that for without ultrasound. The fact suggests that formation of droplets rich in ethanol through ultrasonic atomization.
