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Effect of surfactants on liquid side mass transfer coefficients: a new insight

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Academic year: 2021

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Table 1. Experiments in water at various temperatures: density ( ρ W ), dynamic viscosity  ( µ W ), volumetric mass transfer coefficient ( k L a ) and liquid mass coefficient ( k L )
Table 2. Properties of the aqueous and pure solutions of surfactant (T = 20°C)  Surfactant concentration  (g.L -1 )  ρ L (kg.m -3 )  µ L (cP)  σ L (mN.m -1 )  s e (-)  0.05  69.78  0.4  0.2  60.45  0.8  1.9  39.70  1  10  998.2  1.00  39.70  1
Table 3. Experiments in water at various rotation speeds (T = 20°C): liquid mass coefficient  k L  and constant C 2  N (rpm)  k L  (m.s -1 ) C 2  50  1
Fig. 1. Schematic representation of  the experimental set-up: (1) Double wall vessel, (2)  Oxygen micro-probe Unisense®, (3) Acquisition system, (4) Thermometer, (5)  Thermo-regulation, (6) Magnetic agitator, (7) Gas flowmeter, (8) Nitrogen bottle, (9) Air
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