Abstract
The effect of adsorption on the measurement of diffusion coefficients by the Taylor dispersion technique is investigated by modifying the governing equation to account for reversible, nonequilibrium adsorption. The resulting two-dimensional equations are solved by an explicit finite-difference technique. Experimental data for the acridine carbon dioxide system indicated that acridine adsorbs on the walls on the tubing and these data were investigated with this model. The influence of carious parameters including the number of sites and the rates of adsorption desorption was investigated by conducting a parametric sensitivity analysis on the model. It was found that adsorption of the solute on the wall of the tubing could produce an error as high as 35% on the measured diffusion coefficient compared to the actual diffusion coellicient. Examination of the influence of each of the parameters will enable Inure investigators to reduce the effect of adsorption in the measurement of diffusion coefficients by Taylor dispersion.
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References
P. Stilbs,Progr. NMR Spetrosc. 19:1 (1987).
A. J. Fasteal,Can. J. Chem. 68:1611 (1990).
L. Paduano, R. Sartori, V. Vitagliano, and L. Constantino,J. Solut. Chem. 19:31 (1990).
A. Alizadeh, C. A. Nieto De Castro, and W. A. Wakeham,Int. J. Thermophys. 1:243 (1980).
K. C. Pratt and W. A. Wakeham,Proc. R. Soc. London 336:393 (1974).
R. Feist and G. M. Scheider,Sep. Sci. Technol. 17:261 (1982).
P. A. Wells, R. P. Chaplin, and N. R. Foster,J. Supercit. Fluids 3:8 (1990).
A. A. Clifford and S. E. Coleby,Proc. Roy Soc. Lond. A433:63 (1991).
W. Loh, C. A. Tonegutti, and P. L. O. Volpe,J. Chem. Soc. Faraday Trans. 89:113 (1993).
F. Galembeck,J. Polym. Sci. Polym. Lett. 16:1315 (1978).
J. Yao and G. Strauss,Langmuir 7:2353 (1991).
I. C. S. F. Jardium, M. Sartoratto, P. R. Salida, C. Archundia, and K. E. Collins,Appl. Radiat. Isot. 40:643 (1989)
M. Orejuela, M. S. thesis (Texas A&M University, College Station, 1994).
B. L. Hamilton, M. S. thesis (University of Wyoming, 1992).
V. M. Shenai, B. L. Hamilton, and M. A. Mathews, InSupercritical Fluid Engineering Science Fundamentals and Applications, J. F. Brennecke and E. Kiran, eds. American Chemical Sociey, Washington, DC, 1993.
C. Erkey and A. Akgermann,AIChE J. 36:1715 (1990.
J. J. Shim and K. P. Johnston.AIChE. J. 37:607 (1991).
N. Wakao, S. Kaguci and J. M. Smith,Ind. Eng. Chem. Res. 19:363 (1980).
H. W. Haynes,Catal. Res. Sci. Eng. 30:563 (1988).
G. Taylor,Proc. R. Soc. London 219:186 (1953)
G. Taylor,Proc. R. Soc. London 225:473 (1954).
R. Aris,Proc. R. Soc. London 235:67 (1956).
M. J. E. Golay. inGas Chromatography. D. H. Desty: ed. (Butterworth, London. 1959).
T. Boddington and A. A. Clifford,Proc. Roy. Soc. London A 179: (1993).
S. A. Smith, V. M. Shenai, and M. A. Mattews,J. Supererit. Fluids 3:175 (1991).
J. P. Boris and D. L. Book,J. Comp. Phys. 11:38 (1973).
K. P. Mayock, J. M. Tarbell, and J. L. Duda.Sep. Sci. Tech. 15:1285 (1980).
D. L. Book, J. P. Boris, and K. Hain,J. Comp. Phys. 18:248 (1975).
B. W. Right, M. L. Lee, and G. M. Booth,Chromatographia 15:584 (1982).
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Madras, G., Hamilton, B.L. & Matthews, M.A. Influence of adsorption on the measurement of diffusion coefficients by Taylor dispersion. Int J Thermophys 17, 373–389 (1996). https://doi.org/10.1007/BF01443398
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DOI: https://doi.org/10.1007/BF01443398