The New Jersey Institute of Technology's
Electronic Theses & Dissertations Project

Title:	Effect of concentration on the mass transfer coefficient in the liquid film
Author:	Schaffer, Marvin Baker
View Online:	njit-etd1956-018 (VI, 88 pages ~ 4.1 MB pdf)
Department:	Department of Chemical Engineering
Degree:	Master of Science
Program:	Chemical Engineering
Document Type:	Thesis
Advisory Committee:	Scheibel, Edward G. (Committee chair) Mantell, C. L. (Committee member) Keeffe, George C. (Committee member)
Date:	1956-06
Keywords:	Liquids Diffusion
Availability:	Unrestricted
Abstract:	The effect of liquid concentration on the resistance to mass transfer across the liquid film is studied for an acetone-methyl isobutyl ketone-air system in a packed tower. The liquid film resistance is computed by measuring the overall resistance for various concentrations and subtracting the gas film resistance. The gas film resistance is determined at the same liquid and gas rates by measurements on the pure components. In the theory developed to handle the calculations, it is assumed that the interface temperatures are the wet-bulb temperatures based on a dynamic equilibrium. This supposition is supported experimentally at a liquid rate of 1200 lbs/hr.-ft2 and a gas rate of 313 lbs/hr-ft2 within experimental error. Humidity charts for air-acetone, air-MIK, and air-n butanol, at one atmosphere pressure, are included for reference. Finally, the liquid film resistances ars correlated by the equations below. The first is based on the liquid diffusivity data of Wilke28 and the second on that of Scheibel19. (1) 1/kLa=0.376-0.0000102(C1L)fMm(µ/ρDL) (2) 1/kLa=0.376-0.0000152(C1L)fMm(µ/ρDL)