Air Dehydration by Permeation Through Dimethylpolysiloxane/polysulfone Membrane


  • Shui Wai Lin Instituto Tecnológico de Tijuana
  • Salvador Valera Lamas Instituto Tecnológico de Tijuana



gas separation, permselective membranes, dimethylpolysiloxane, dry air.


The present work focuses on design, fabrication and evaluation of an air-dehydration membrane system that is capable of producing dry air with a Dew Point of –50ºC at a rate of 310 cm3/s using compressed wet-air (90 psig, 23ºC) as feed to a membrane system of dimethylpolysiloxane thin-film supported by microporous polysulfone substrate (PDMS/PS). The dehydrator element comprises of a flat sheet PDMS/PS membrane fixed to a cylindrical tubular support, the latter is fitted inside an appropriated chamber. The air-dehydration process is achieved by means of selective permeation of H2O(g) over N2 and O2 gases, the major components of the wet- air, through PDMS/PS membrane.


Download data is not yet available.

Author Biographies

Shui Wai Lin, Instituto Tecnológico de Tijuana

Centro de Graduados e Investigación

Salvador Valera Lamas, Instituto Tecnológico de Tijuana

Centro de Graduados e Investigación


Baker, R.W. Ind. Eng. Chem. Res. 2002, 41, 1393-1411.

Kimura, S.G.; Browall, W.R. J. Membr. Sci. 1986, 29, 69-77.

Liu, L.; Chen, Y.; Li, S.; Deng, M. Sep. Sci. Tech. 2001, 36, 3701-3720.

Rice, A.W.; Murphy, M. K. U.S. Patent 4,783,201 1988.

Murphy, M. K.; Rice, A.W.; Freeman J.J. U.S. Patent 4,793,830. 1988.

Prasad R. U.S. Patent 4,931,070. 1990.

Friesen, D.T.; Ray, R.J.; Newbold, D.D. U.S. Patent 5,002,590. 1991.

Rogers, C.E. Permselective Membranes, Marcel Decker Inc. 1971.

Osada Y.; Nakagawa T. Membrane Science and Technology, Marcel Decker Inc. N.Y. 1992.

Shin-Etsu Chemical Co. Characteristic properties of silicone rubber compound, (Gas permeability), accessed in December 2008.

Fried, J.R. Polymer Science and Technology 2nd. Ed. Prentice Hall, N.J. 2003.

Matsumoto K.; Ishii K.; Kuroda T. Polymer Journal, 1991, 23, 491-499.

Yamasaki, A.; Tyagi R.K.; Fouda A.E.; Matsuura, T.; Jonasson, K. J. Membr. Sci. 1997, 123, 89-94.

Wang, D.; Li, K.; Teo, W.K. J. Membr. Sci. 1996, 115, 85-108.

Henis, J.M.; Tripodi, M.K. Sep. Sci. Tech. 1980, 15, 1059-1068.

Dean, J.A. Lange’s Handbook of Chemistry 13th. Ed. McGraw-Hill, 1985.

Kesting, R.E. Synthetic Polymeric Membranes, Wiley, N.Y.1985.