Rate-limited mass transfer of octane, decane, and dodecane into nonionic surfactants solutions under laminar flow conditions

摘要: Abstract A key component to predicting the success of utilizing surfactants enhance removal organic liquids from soil system is quantifying micellar solubilization kinetics. In this study, a flow reactor was employed investigate influence surfactant ethoxylate chain length on rates octane, decane, and dodecane in solutions homologous series purified dodecyl alcohol ethoxylates. Effluent concentration data were fit using finite element model linear-driving-force represent mass transfer at interface. For between 0.1 2 ml min−1, coefficients ranged 5 × 10−8 7 × 10−7 m s−1 did not vary systematic way with either solute structure or lower than those found pure water. Correlations developed for Sherwood number based diffusion micelles containing material (organic-laden micelle) exhibit velocity dependence similar that systems aqueous diffusion. These results suggest under gentle flowing conditions, limited by organic-laden micelle. Although these trends are specific experimental system, demonstrate importance selecting proper coefficient when modeling processes.