Mathematical Model and Simulation of a Thermal Diffusion Column

Author:

Vela´squez Juan E.1,Chejne Farid2,Hill Alan F. J.1

Affiliation:

1. Instituto de Energı´a y Termodina´mica, Univ. Pontificia Bolivariana, Medellı´n, Colombia

2. Escuela de Procesos y Energı´a, Univ. Nacional de Colombia, Medellı´n, Colombia

Abstract

A two-dimensional mathematical model, in stationary state was developed for the separation of species in a thermal diffusion column working with total reflux. The model was applied to a gas mixture of CO2 and N2. The existence of convective currents along the column was verified, the separation of species due to the temperature gradient was predicted and the effect of the thermal gradient and of the operation pressures on the composition profiles was analyzed.

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

Reference43 articles.

1. Onsanger, L. , 1931, Phys. Rev., 37, p. 405405.

2. Prigogine, I., 1988, Introduction To Thermodynamics Of Irreversible Processes, 3 ed., Interscience Publishers, USA.

3. Grew, K. E., and Ibbs T. L., 1952, Thermal Diffusion in Gases, Cambridge University Press, Cambridge UK.

4. Vasaru, G., Mu¨ller, G., Reinhold, G., and Fodor, T., 1969, The Thermal Diffusion Column, Veb Deutscher Verlag Der Wissenschaften, Berlin.

5. Espan˜ol, C., 1964, “La Difusio´n Te´rmica en Gases como Me´todo de Separacio´n de Iso´topos Estables,” Ciencia y Te´cnica, 133, pp. 329–353.

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