Page 96 - Adsorption Technology & Design, Elsevier (1998)

Rates of adsorption of gases and vapours by porous media 93

0.8
308 K:N2- He
_
0.7

- ~
0.6

0.5
="" 363 K:N2- He
..ul=
04

CF4- He
0.3

i
0.2
g
iC4Hlo- He
0.1

0 I, I I I ,I I
0 0.1 0.2 0.3
1/u a sec ~ cm -2

Figure 4.12 Extraction of axial dispersion and molecular diffusion coefficients and
intraparticle diffusivities. Plot of (o2/2# 2) Llu against l/u 2 for N2, CF4
and i C4Hw in a 4A zeolite (source: Kumar et al. 1982).

REFERENCES

Barrett, E. P., Joyner, L. G. and Halenda, P. P. (1951) J. Am. Chem. Soc.,
73, 373
Brunovska, A., Hlavacek, V., Ilavsky, J. and Valtyai, J. (1978) Chem. Eng.
Sci., 33, 1385
Carberry, J. J. (1975) Ind. Eng. Chem. Fund., 14(2), 129
Chapman, S. and Cowling, T.G. (1951) Mathematical Theory of Non-
Uniform Gases, p. 55, McGraw-Hill