424149 Interfacial and Surface Area Characterization of Dense Sprays with Application to Absorption

Wednesday, November 11, 2015: 4:05 PM
155B (Salt Palace Convention Center)
Yash Tamhankar1, Brett King1, James R. Whiteley1, Ken C. McCarley2, Tony Cai2, Mike Resetarits3 and Clint P. Aichele1, (1)School of Chemical Engineering, Oklahoma State University, Stillwater, OK, (2)Fractionation Research, Inc., Stillwater, OK, (3)Independent Consultant, Lakewood Ranch, FL

Despite the wide use of sprays, the fundamentals of spray absorption are poorly understood. There is a particular lack of understanding about the relationship between surface area and interfacial area for dense sprays. The available surface area has a strong impact on the overall efficiency of absorption using sprays. However, not all of the surface area of a spray is available for mass transfer. Reaction of the solute gas with the solvent drops can result in saturation of the solvent mass and a decrease in the available interfacial area for mass transfer. Comparison of sprays with packed columns and other contactors can conveniently be made on an interfacial area basis. Thus, there is a need to ascertain the effective interfacial area for spray absorption along with the surface area availability. This study presents droplet size measurements using a Phase Doppler Interferometer (PDI), surface area quantification, and interfacial area measurements with the CO2-0.1 N NaOH system inside a laboratory spray column. The effect of L/G ratio and gas-liquid contact height on the surface area availability and interfacial area are elucidated. A methodology is presented to compare the surface area measurements to interfacial area measurements, and this work will ultimately help in providing fundamental insight into spray absorption and spray behavior.

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See more of this Session: Advances in Absorption
See more of this Group/Topical: Separations Division