, Volume 4, Issue 1, pp 63–73 | Cite as

A Study of Adsorption of Water Vapour on Wool under Static and Dynamic Conditions

  • Semra Ülkü
  • Devrim Balköse
  • Tayfun Çağa
  • Fehime Özkan
  • Sevgi Ulutan


Adsorption of water vapour on wool provides not only textile comfort, but also convenience in transportation due to increase in its bulk density. The adsorption and desorption isotherms of water vapour for wool were determined by both volumetric technique using a Coulter Omnisorp 100CX instrument and gravimetric method employing a Cahn 2000 electronic microbalance. Adsorption isotherm fitting to B.E.T. model and hysteresis on desorption was observed. The average effective diffusion coefficient of water in wool was found to be 8.4 × 10-14 m2s-1 at 25°C from gravimetric data. The effects of packing height and air velocity on the breakthrough curves were also investigated in the wool packed columns. For pseudo first order model, k values changing between 0.33 × 10-6 − 69 × 10-6 s-1 was obtained for 2.2–6.4 cm s-1 air velocity and 0.05–0.20 m packing height ranges.

wool water vapour adsorption diffusion column dynamics 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Alexander, P. and R. Hudson, Wool: Its Chemistry and Physics, Chapman and Hall, London, 1945.Google Scholar
  2. Armstrong, A.A. and V. Stannet, “Temperature Effects During the Sorption and Desorption of Water Vapour in High Polymers,” Die Macromoleculare Chemie, 90, 145-160 (1966).Google Scholar
  3. Balköse, D., “Study of Physicochemical Properties of the Natural and Modified Wool” (in Turkish), Ph.D. Thesis, Ege University, İzmir, 1977.Google Scholar
  4. Balköse, D., H. Baltac?oğlu, and F. Abugaliye, “Air Drying in Silicagel Packed Column,” Drying Technology, 8, 367-384 (1990).Google Scholar
  5. Carter, J.W., “Adsorption Separation Processes,” Properties and Application of Zeolites, R.P. Towsend (Ed.), The Chemical Society, London, 1979.Google Scholar
  6. Coulter Omnisorp 100CX Manual, Corporate Com., FL, 1991.Google Scholar
  7. Crank, J., The Mathematics of Diffusion, Clarendon Press, Oxford, 1975.Google Scholar
  8. David, H.G. and P. Nordon, “Case Studies of Coupled Heat and Moisture Diffusion in Wool Beds,” Textile Res. J., 36, 166-172 (1966).Google Scholar
  9. Foost A.S., L.A. Wenzel, C.W. Clomp, L.M. Mous, L.B. Andersen, “Principles of Unit Operations,” John Wiley and Sons (1960).Google Scholar
  10. Fukuda, M., M. Ueda, A. Emato, and H. Kawai, “Investigation of the Moisture Adsorptivity of Polar and Hydrophilic Groups in Wool Keratin by Its Chemical Modifications,” Sen-i Gakkaishi, 46, 415-432 (1960).Google Scholar
  11. Gregg, S.J. and K.S.W. Sing, Adsorption, Surface Area, Porosity, Academic Press, London, 1982.Google Scholar
  12. IWS, Wool Facts, 1989.Google Scholar
  13. Leeder, S.D. and I.C. Watt, “The Role of Amino Groups in Water Absorption by Keratin,” J. Phy. Chem., 69, 3280-3284 (1965).Google Scholar
  14. McCabe, W.L., J.C. Smith, and P. Harriot, Unit Operations of Chemical Engineering, McGraw Hill, New York, 1988.Google Scholar
  15. Menefee, E., A. Pittman, R. Landwehr, and K.S. Gregorski, “Water Transport and Wrinkle Recovery of Wool,” Tex. Res. J., 52, 86-92 (1982).Google Scholar
  16. Miyagawa, M., K. Kohata, A. Takaoka, and H. Kawai, “Fundamental Studies on the Interaction Between Moisture and Textile,” Sen-i Gakkaishi, 43, 57-77 (1987).Google Scholar
  17. Morooko, S., T. Kato, M. Inada, T. Kago, and K. Kusakabe, “Modelling of Adsorption Unit Packed with Amidoxime Fibre Balls for the Recovery of Uranium from Sea Water,” Ind. Eng. Chem. Res., 30, 190-196 (1991).Google Scholar
  18. Nordon, P., “A Model For Mass Transfer in Beds of Wool Fibres,” Int. J. Heat and Mass Transfer, 7, 639-651 (1965a).Google Scholar
  19. Nordon, P., “The exchange of Water Between a Bed of Wool Fibers and a Permeating Air Stream,” Proc. 3rd Int. Wool Textile Research Conference, Paris, vol. 3, pp. 23, 1965b.Google Scholar
  20. Nordon, P., B.H. Mackay, J.G. Downes, and G.B. Mc Mahon, “Sorption Kinetics of Diffusion Coefficients and Analysis of Integral Sorption,” Textile Res. J., 40, 461-469 (1970).Google Scholar
  21. Park, J. and K.S. Knaebel, “Adsorption Breakthrough Behavior: Unusual Effects and Possible Causes,” AIChE, 660-669 (1992).Google Scholar
  22. Pearson, A.J.C. and J. Warner, “Compression of Wool to Very High Densities,” J. Text. Inst., 74, 233-240 (1983).Google Scholar
  23. Rasmuson, A., “The Influence of The Particle Shape on The Dynamics of Fixed Beds,” Chem. Eng. Sci., 40, 1115-1122 (1985).Google Scholar
  24. Rosen, J.B., “General Numerical Solution for Solid Diffusion in Fixed Beds,” Ind. and Eng. Chem., 46, 1590-1594 (1954).Google Scholar
  25. Ruthven, D.M., Principles of Adsorption and Adsorption Processes, 236, John Wiley and Sons, New York, 1984.Google Scholar
  26. Stuart, I.M., A.M. Schneider, and T.R. Turner, “Perception of Heat of Sorption of Wool,” Text. Res. J., 59, 324-329 (1989).Google Scholar
  27. Tudge, A.P., “Studies in Chromotographic Transport, Effect of Isotherm Shape,” Can. J. Phys. I, 39, 1611-1618 (1961).Google Scholar
  28. Ülkü, S., D. Balköse, H. Baltac?oğlu, F. Özkan, and A. Yildir?m, “Natural Zeolites in Air Drying,” Drying Tech., 10, 475-562 (1992).Google Scholar
  29. Walker, I.K., G.F. Paterson, and W.S. Harrison, “Diffusion of Regain in Bulk Wool,” N.Z.J. Sci., 13, 240-255 (1970).Google Scholar
  30. Watt, I.C. and G.B. McMahon, “The Effects of Heat of Sorption in Wool Water System,” Textile Res. J., 36, 738-745 (1966).Google Scholar
  31. Wesson, S.P., “A Continuous Automated Technique to Measure Monolayer and Multilayer Adsorption of Pure Gases,” Fundamentals of Adsorption, A.L. Myers and G. Belfort (Eds.), pp. 701-709, United Engineering Trustees Inc., New York, 1984.Google Scholar
  32. Wlochowicz, A. and E.W. Bujok, “Effect of Dyeing on Sorption of Water Vapour by Wool,” Textile Res. J., 57, 503-508 (1987).Google Scholar

Copyright information

© Kluwer Academic Publishers 1998

Authors and Affiliations

  • Semra Ülkü
    • 1
  • Devrim Balköse
    • 2
  • Tayfun Çağa
    • 3
  • Fehime Özkan
    • 4
  • Sevgi Ulutan
    • 4
  1. 1.İzmir Institute of TechnologyBasmane-İzmir-Turkey
  2. 2.Faculty of Engineering, Chemical Engineering, DeptEge UniversityBornova-İzmir-Turkey
  3. 3.İzmir Institute of TechnologyBasmane-İzmir-Turkey
  4. 4.Faculty of Engineering, Chemical Engineering, DeptEge UniversityBornova-İzmir-Turkey

Personalised recommendations