Effect of surfactant lengths on gas-liquid oxygen mass transfer from a single rising bubble
نویسندگان
چکیده
This work is an experimental investigation of the effect nature surfactants on oxygen mass transfer. The study focuses three cationic with different hydrophobic chain lengths, and four nonionic hydrophilic lengths. Equilibrium adsorption isotherms are calculated for each surfactant from values surface tension in static conditions. Surfactant solutions at concentrations between 2.5 × 10-8 5 10-3 mol/L were prepared transfer millimetric air bubbles (between 0.82 1.08 mm) was measured by Planar Laser Induced Fluorescence Inhibition (PLIF-I). When bulk concentration increased, results showed a sharp decrease bubble velocity, range 283–75 mm/s, liquid-side coefficient, 5.6 10-4–0.4 10-4 m/s. observed all studied. However, length did not appear to affect hydrodynamics rising or same concentration. Furthermore, concentration, increasing had impact velocity coefficient oxygen. Finally, Sherwood number medium compared classical correlations gas–liquid prediction. Those seemed reach limit very concentrated medium.
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ژورنال
عنوان ژورنال: Chemical Engineering Science
سال: 2022
ISSN: ['1873-4405', '0009-2509']
DOI: https://doi.org/10.1016/j.ces.2021.117102