Effect of concentration on the mass transfer coefficient in the liquid film

Author

Marvin Baker Schaffer, New Jersey Institute of Technology
Philip Major Pomerantz, New Jersey Institute of Technology

Document Type

Thesis

Date of Award

6-30-1956

Degree Name

Master of Science in Chemical Engineering - (M.S.)

Department

Chemical Engineering

First Advisor

Edward G. Scheibel

Second Advisor

C. L. Mantell

Third Advisor

George C. Keeffe

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/k_La=0.376-0.0000102(C¹_L)_fM_m(µ/ρD_L)

(2) 1/k_La=0.376-0.0000152(C¹_L)_fM_m(µ/ρD_L)

Recommended Citation

Schaffer, Marvin Baker and Pomerantz, Philip Major, "Effect of concentration on the mass transfer coefficient in the liquid film" (1956). Theses. 2431.
https://digitalcommons.njit.edu/theses/2431