Date of Award
Master of Science in Chemical Engineering - (M.S.)
Chemical Engineering, Chemistry and Environmental Science
Angelo J. Perna
John R. Schuring
A bench scale investigation was conducted in a Plexiglass ™ Test cell 1 foot square by 2 feet in height, packed with 400 mesh sand to a density of 100 lb. /ft3. The sand was contaminated with a mixture of 10% ethanol and 90% water by weight having a total weight of 11.1 pounds, before it was packed in the test cell. A geotextile 1/2 inch thick was used as a simulated fracture and was placed 3 inches from the bottom of the tank. A siren and a whistle were tested in this fracture.
The data were divided into a transient, two phase flow region, and a falling rate region similar to drying theory analysis. Free moisture versus time data showed a 39.1% improvement for the siren and a 412.4% improvement for the whistle in the transient region, and a 69% improvement for the siren and a 455 % improvement for the whistle in the falling rate region. Concentration of ethanol versus time data showed a 62.9% improvement for the siren in the transient region and no comparison was established for the whistle. A 192.0% improvement for the siren and a 931.4 % improvement for the whistle were measured in the falling rate region.
The average time to reach asymptotic value of 0.01 free moisture with the siren was reduced by 37% and greater than 74.3% with the whistle. The average time to reach an ethanol concentration of 1 ppmv was reduced by greater than 41.3% with the siren and by greater than 74% with the whistle.
Fernandez, Hugo J., "An investigation into the feasibility of utilizing pneumatic ultrasonic devices coupled with pneumatic fracturing in enhancing removal of volatile organic compounds from soils" (1997). Theses. 1003.