A New Measurement Method of Liquid Transport Properties
Liquid transport properties, such as suction pressure, permeability and apparent moisture diffusivity, were measured for wide range of degree of liquid saturation within wet material to be dried. Wet sample was pressurized-by N2 gas and drained water through membrane filter was measured continuously by a micro processor system. Suction pressure was determined from the equilibrium data. Permeability and difusivity were estimated from the transient change of the drained water volume, by using a linearized transport equation in each small increment of pressure.
Obtained data of both permeability and apparent moisture diffusivity show a strong dependence of saturation.
Validity of the present method is confirmed by comparing with the previous steady state drying method.
KeywordsGlass Bead Pressure Cell Transient Change Moisture Diffusivity Suction Pressure
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- 2.Wakabayashi,K., Kagaku Kogaku 28, 33 (1964)Google Scholar
- 3.Hayashi, S.Ph. D. thesis, Kyoto Univ., (1965)Google Scholar
- Toei, R., M. Okazaki, K. Shioda and K. Masuda, Proc. of 1st Pacific Chem. Congr. part 3, 33 (1972)Google Scholar
- Evans, A.A. and R.B.Keey, Chem. Eng. J., 10, 135 (1975)Google Scholar
- 7.Endo,A., I. Shishido, M. Suzuki and S. Ohtani, AIChE Symp. Ser. No.163 73, 57 (19777Google Scholar
- 8.Krischer, O., Die wissenschaftlichen Grundlargen der Trocknungstechnik Springer-Verlag, 2/e (1963)Google Scholar
- Schoeber, W.J. and H.Thijssen, AIChE Symp. Ser. No. 163 73, 12 (1977)Google Scholar
- 11.Liou, J.K.,Ph. D. thesis, Univ. Wabeningen, (1982)Google Scholar
- Shishido, I., M. Suzuki and S. Ohtani, Proc. of 1st Int. Symp. on Drying 30 (1978)Google Scholar