Abstract
Rates of mass transfer at V-corrugated surfaces in a rectangular duct were measured under two phase flow by the limiting current technique. Variables studied were groove angle and peak to valley height of the corrugated surface, solution velocity and superficial gas velocity. For a given solution velocity and superficial gas velocity the mass transfer coefficient was found to increase with increasing groove angle and decrease with increasing groove peak to valley height. The volumetric mass transfer enhancement ratio compared to the smooth surface ranged from 3.7 to 7.58 depending on the operating conditions. The mass transfer data at the corrugated surface were correlated by the equation: Sh = 1.52Sc(0.33)Re(L)(0.285)Re(g)(0.28)(d(e)/p)(0.375).
For a batch gas sparged reactor with an active corrugated surface the data were correlated by the equation: j=0.047(Re.Fr)(-0.15)(d(e)/p)(0.6).
Implications of the present results for the design and operation of compact continuous two phase and batch gas sparged heat and mass transfer equipments such catalytic reactors, electrochemical reactors, and heat exchangers was noted. (C) 2013 Elsevier B.V. All rights reserved.