Effect of temperature on mass transfer coefficient for volatilization of
volatile organic compounds from water
ผลของอุณหภูมิต่อสัมประสิทธิ์การถ่ายโอนมวลสารของกระบวนการระเหยของสารประกอบ
อินทรีย์จากน้ำ
Charun Bunyakan, D. of Chemical Eng., F. of Eng., PSU.
Wichai Nootong, B.Eng. Student in Chemical Eng., PSU.
Staporn Yaowapongaree, B.Eng. Student in Chemical Eng., PSU.
Corresponding e-mail : bcharun@ratree.psu.ac.th
Grant : Faculty of Engineering, PSU.
Published : Songklanakarin J Sci Technol 2000, 22(2) : 241-247
Key words : mass transfer coefficient, gas-film mass transfer coefficient,
liquid-film mass transfer coefficient, volatilization
This paper studies the effect of temperature on the gas-film mass transfer coefficient (kG) and
the liquid-film mass transfer coefficient (kL) for the volatilization of volatile organic compounds (VOC) from water. Volatilization experiments were conducted in a water bath with a temperature controller. The gas-film and liquid-film mass transfer coefficients were experimentally determined at various temperatures from 20oC to 40oC for the volatilization of methanol and toluene from water. The initial concentrations of methanol and toluene in water were 1000 and 200 mg/L, respectively. The mass transfer coefficient models of kG and kL were developed based on Arrhenius' equation. The models
were validated by using the predicted value of KOL (which was calculated from kG and kL model) compared with KOL from the experimental result of the volatilization of chlorofrom from water. It
was found that the predicted value of KOL provided good agreement with the experimental data.
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