Removal of Unnecessary Gas by Spraying Water Particles Formed by Aerial Ultrasonic Waves

Abstract

Gases contained in air may have adverse effects on humans and the environment depending on their constituents. In this study, a method by which gas removal is enhanced by applying a high-intensity aerial ultrasonic wave to a mixture of gas and sprayed water particles was developed. To generate an aerial ultrasonic wave, an aerial ultrasonic source with a square transverse vibrating plate in the lattice mode was used. The square transverse vibrating plate was also used to generate water particles; water was supplied to the vibrating area to produce water particles for the mist. As a result, the following were clarified. To remove gas, both aerial ultrasonic waves and water particles are necessary. Residual gas concentration decreases with increasing amount of water supplied. For input electric powers in the range of 20–50 W, the percentage of ethanol gas removed is almost constant regardless of the input electric power. Such percentage is also almost constant regardless of the initial ethanol gas concentration. The mechanism underlying the removal of gas is discussed.