When aqueous solutions obtained from the production of n-propanol and iso-propanol are distilled, azeotropes are formed at the concentrations of 72 wt% and 88 wt% respectively. So it is important to predict the gas holdup in an aqueous solution with gas-liquid contact for the effective separation by the azeotropic distillation. In this study, the gas holdup of the solution was measured at the different concentration and temperature to investigate the effect of variable physical properties such as viscosity and surface tension along with different patterns of distribution plate and different gas velocity.
From the experimental result, a correlation between the gas holdup and surface tension and viscosity of aqueous solution, gas velocity, and pattern of distribution plate was found as follows;
φ（(δ/D）․ε)(μ_Lu_G/σ_L)×10¹⁰ = KR_eGⁿ