Journal of Applied Science and Engineering

Published by Tamkang University Press


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Jia-Jan Guo1 and Chii-Dong Ho This email address is being protected from spambots. You need JavaScript enabled to view it.1

1Department of Chemical and Materials Engineering, Tamkang University, Tamsui, Taiwan 251, R.O.C.


Received: November 28, 2006
Accepted: February 5, 2007
Publication Date: March 1, 2008

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A new device that divides the Clusius-Dickel thermal-diffusion column into two subchannels by inserting a permeable-barrier resulting in improving the separation efficiency for heavy water system was investigated analytically. The analytical solutions were obtained by using the separated variables with an orthogonal expansion technique in the terms of power series. The theoretical predictions were represented graphically with feed mass flow rate, feed fraction concentration, aspect ratio and channel thickness ratio as parameters and compared to classical Clusius-Dickel column of the same working dimensions. Considerable separation efficiency improvements on heavy water enrichment were obtained by employing such double-flow devices with inserting a permeable-barrier, instead of using the Clusius-Dickel thermal-diffusion column.

Keywords: Double-Flow Thermal-Diffusion Column, Aspect Ratio, Channel Thickness Ratio, Heavy Water, Analytical Solution


  1. [1] Enskog, D., “A Generalization of Maxwell’s Second Kinetic Gas Theory,” Physik. Z., Vol. 12, pp. 5668 (1911).
  2. [2] Chapman, S. and Dootson, F. W., “Thermal Diffusion,” Phil. Mag., Vol. 33, pp. 248256 (1917).
  3. [3] Ho, C. D., Chang, H. and Guo, J. J., “Effects of Inclined Angle and Aspect Ratio on Heavy Water Separation Efficiencies in Double-Flow Thermal-Diffusion Columns with External Refluxes,” Sep. Sci. Technol., Vol. 39, pp. 9751004 (2004).
  4. [4] Ho, C. D. Ho and Chaing, S. C., “A Theoretical Study of the Improvement in Performance of Double-Pass Mass Exchangers with External Refluxes Separated by an Idealized Permeable Barrier,” Chem. Eng. J., Vol. 89, pp. 253262 (2002).
  5. [5] Ebadian, M. A. and Zhang, H. Y., “An Exact Solution of Extended Graetz Problem with Axial Heat Conduction,” Int. J. Heat Mass Transfer, Vol. 32, pp. 1709 1717 (1989).
  6. [6] Rutherford, W. M. and Lindsay, C. N., “Separation of Hydrogen Isotopes by Thermal Diffusion,” Fusion Technology, Vol. 8, pp. 22782284 (1985).
  7. [7] Standen, A., “Encyclopedia of Chemical Technology,” Chap. 7, 549, Wiley, New York (1978).
  8. [8] Yamamoto, I., Kobayashi, N. and Kanagawa, A., “State of the Art of Separative Analysis of Cryogenic-Wall Thermal Diffusion Column for Hydrogen Isotope Separation,” Fusion Technology, Vol. 28, pp. 785790 (1995).
  9. [9] Kobayashi, N., Yamakawa, H. and Yamamoto, I., “Explicit Approximation to Thermal Diffusion Factor in Isotopic 3-Component Mixture,” Journal of Nuclear Science and Technology, Vol. 34, pp. 167175 (1997).
  10. [10] Yeh, H. M., Ho, C. D. and Yen, Y. L., “Further Study on the Enrichment of Heavy Water in ContinuousType Thermal-Diffusion Columns,” Sep. Sci. Technol., Vol. 37, pp. 11791198 (2002).



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