Correlation of the effects of viscosity and surface tension on gas absorption rates into freely falling turbulent liquid films

Abstract

Experimental data for gas absorption into freely falling turbulent liquid films are presented. Carbon dioxide was absorbed into methanoi and aqueous propanol solutions at 25°C to obtain a surface tension range of 22.2 – 72 × 10 − 3N/m. Hydrogen, oxygen and CO 2 were absorbed into ethanol at 25°C to obtain a diffusion coefficient range of 3.88–17.6 × 10 −9 m 2/s in a low surface tension liquid. The data obtained, together with earlier data ofLamourelle and Sandall, and Chung and Mills, was used to develop a correlation of the mass transfer coefficient which properly accounts for the effects of liquid phase properties.