American Society of Civil Engineers


Temperature Dependence of Liquid Film Coefficient for Gas Transfer


by Ekaterini I. Daniil, S.M.ASCE, (Grad. Res. Asst., St. Anthony Falls Hydr. Lab., Dept. of Civ. and Mineral Engrg., Univ. of Minnesota, Minneapolis, MN 55414) and John S. Gulliver, M.ASCE, (Assoc. Prof., St. Anthony Falls Hydr. Lab., Dept. of Civ. and Mineral Engrg., Univ. of Minnesota, Minneapolis, MN 55414)

Journal of Environmental Engineering, Vol. 114, No. 5, September/October 1988, pp. 1224-1229, (doi:  http://dx.doi.org/10.1061/(ASCE)0733-9372(1988)114:5(1224))

     Access full text
     Permissions for Reuse  

Document type: Technical Note
Abstract: The effect of temperature on gas transfer has typically been accounted for through empirical equations. Ideally the temperature dependence of the liquid film coefficient should be derived through the temperature dependence of the physical properties influencing the gas transfer process. Herein existing equations and models for the prediction of the temperature correction factor are compared. This comparison leads to the conclusion that the theoretically derived and experimentally verified equation relating the liquid film coefficient to Sc–¹/² (Sc=ν/D is the Schmidt number), is the appropriate one to be used for the conversion of data from one temperature to another. This equation has no fitted coefficient and gives almost identical results to the standard equation currently used. The equation also allows for the translation of gas transfer coefficients between various gases. In addition the temperature correction factor is shown to depend only on water properties and is the same for all gases.


ASCE Subject Headings:
Air-water interactions
Gas
Temperature effects
Transfer functions