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Mass Transfer in VOC Adsorption on Zeolite :
Experimental and Theoretical Breakthrough Curves
Stephan Brosillon, Marie-Hélène Manero, Jean-Noel Foussard
To cite this version:
Stephan Brosillon, Marie-Hélène Manero, Jean-Noel Foussard. Mass Transfer in VOC Adsorption on
Zeolite : Experimental and Theoretical Breakthrough Curves. Environmental Science and Technology,
American Chemical Society, 2001, 35 (17), pp.3571-3575. �10.1021/es010017x�. �hal-01897855�
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This is an author’s version published in: http://oatao.univ-toulouse.fr/23281
To cite this version:
Brosillon, Stephan and Manero, Marie-Hélène
and Foussard, Jean-Noel Mass Transfer in
VOC Adsorption on Zeolite : Experimental and Theoretical Breakthrough Curves. (2001)
Environmental Science & Technology, 35 (17). 3571-3575. ISSN 0013-936X
Official URL :
https://doi.org/10.1021/es010017x
Surface Diffusivity. The calculation of the ratio Dk/De
using the experimental values allows an estimation of the contribution of Knudsen diffusivity in the internal transport. These values are included in Table 4 and show that the Knudsen diffusivity has only a slight importance and that intraparticle transport is mainly concerned by surface diffusion. Indeed the mean pore radius of zeolite is very small, close to the molecule size, and involves transport of compounds in the adsorbate state. Surface diffusivity (Ds)
was calculated by means of eq 9 with the assumption that surface tortuosity and pore tortuosity were the same and equal to 4 (26). The values are of the same order as the surface diffusivity obtained for linear hydrocarbon on activated carbon (9) and NaX zeolite (27).
Nomenclature
b
Langmuir constant
C
gas concentration (mol m
-3)
C
sgas concentration at the surface of the pellet (mol
m
-3)
C
egas concentration at equilibrium (mol m
-3)
C
0initial concentration (mol m
-3)
D
fluid flow (m
3h
-1)
D
cmicropore diffusivity (m
2s
-1)
D
colcolumn diameter (m)
D
eeffective diffusivity (m
2s
-1)
D
e,avaverage effective diffusivity (m
2s
-1)
D
kKnudsen diffusivity (m
2s
-1)
D
mmolecular diffusivity (m
2s
-1)
D
pporous diffusivity (m
2s
-1)
D
ssurface diffusivity (m
2s
-1)
H
height of bed (m)
K
equilibrium constant
k
finterphase mass-transfer coefficient (m s
-1)
k
pintrapellet mass-transfer coefficient (s
-1)
L′
characteristic length (m)
M
molecular weight (g mol
-1)
N
number of increments
q
moles of adsorbate adsorbed per unit mass of
adsorbent (mol kg
-1)
q
maxmaximum adsorbed phase concentration (mol
kg
-1)
q
sconcentration adsorbed on the surface of adsorbent
(mol kg
-1)
r
omean pore radius (m)
R
ideal gas constant (8.3145 J mol
-1K
-1)
R
cradius of microparticle (m)
R
pequivalent radius of pellet (m)
S
pexternal area (m
2m
-3)
S
p′
external area of one pellet (m
2)
t
time (s)
T
temperature (K)
u
superficial velocity (m s
-1)
V
pvolume of a pellet (m
3)
z
axial coordinate in the column (m)
porosity of bed
p
porosity of particle
F
pdensity of adsorbent (kg m
-3)
F
lbed density (kg/m
-3)
τ
p,stortuosity, pore, surface
Dimensionless Numbers
Re
Reynolds number
Sc
Schmidt number
Pe
Peclet number
Literature Cited
(1) Manero, M. H.; Jain, R. K.; Aurelle, Y.; Cabassud, C.; Roustan, M. Environmental Technologies and Trends; Shelton, S. P., Ed.; Springer: New York, 1996; pp 83-97.
(2) Fajula, F.; Plee, D.; Jansen, J. C.; Sto¨cker, M.; Karge, H. G.; Weitkamp, J. Gas and Liquid Separations, Studies in Surface
Science and Catalogs; Elsevier: Amsterdam, 1994; p 633.
(3) Le Cloirec, P.; Dagois, G.; Martin, G. Traitements avec Transfer
Gaz-Solide: l’Adsorption, Odeurs et De´sodorisation dans l’Environnement; Lavoisier Tec & Doc: Paris, 1991.
(4) Cal, M. P.; Larson, S. M.; Rood, M. J. Environ. Prog. 1994, 13, 26-30.
(5) Tien, C. Adsorption Calculations and Modelling; Butterworth-Heinemann: Washington, 1994.
(6) Suzuki, M. Adsorption Engineering; Kodansha, Ed.; Elsevier: Amsterdam, 1990.
(7) Ruthven; D. Principles of Adsorption and Adsorption Processes; John Wiley and Sons: New York, 1984.
(8) Costa, E.; Callega, G.; Domingo, F. AIChE J. 1985, 31 (6), 982. (9) Huang, C. C.; Fair, J. R AIChE J. 1988, 34 (11), 1861-1877. (10) Delage, F.; Pre´, P.; Le Cloirec, P. Environ. Sci. Technol. 2000, 34
(22), 4816-4821.
(11) Chenu, M.; Bouzaza, A.; Wolbert, D.; Laplanche, A. Environ.
Technol. 1998, 19, 1029-1038.
(12) Malek, A.; Farooq, S. AIChE J. 1997, 43, 761-776.
(13) Chandak, M. V.; Lin, Y. S. Environ. Technol. 1998, 19, 941-948. (14) Moon, H.; Lee, W. K. Chem. Eng. Sci. 1986, 41 (8), 1995-2004. (15) Langmuir, I. J. Am. Chem. Soc. 1918, 40, 1361.
(16) Glueckauf, E. Trans. Faraday Soc. 1955, 51, 1540.
(17) Karger, J.; Ruthven, D. M. Diffusion in Zeolites and Other
Microporous Solids; Wiley: New York, 1992.
(18) Meier, W. M.; Olson, D. H. Atlas of Zeolite Structure Types; Butterworth-Heinmann: Boston, 1992.
(19) Brosillon, S.; Manero, M. H.; Foussard, J. N. Environ. Technol. 2000, 21, 457-465.
(20) Petrovic, L. J.; Thodos, G. Ind. Eng. Chem. Fundam. 1968, 7, 274.
(21) Wen, C. Y.; Fan, L. T. Models for Flows Systems and Chemical
Reactors; Marcel Dekker: New York, 1975.
(22) Raghavan, N. S.; Ruthven, D. M. AIChE J. 1983, 29, 922. (23) Villermaux, J. Ge´nie de la Re´action Chimique; Lavoisier Tec &
Doc: Paris, 1993; Chapter 8, pp 297-346.
(24) Bird, R. B.; Stewart, W. E.; Lightfoot, E. N. Transport Phenomena; Wiley: New York, 1960.
(25) Haag, W. O.; Lago, R. M.; Weisz, P. B. Discuss. Faraday Soc. 1982, 72, 317.
(26) Post, M. F. M.; Van Amstel, J.; Kouwenhoven, H. W. Proceedings
of the 6th International Zeolite Conference; Butterworth:
Guild-ford, 1984; p 517.
(27) Satterfield, C. N. Heterogeneous Catalysis in Practice; McGraw-Hill: NewYork, 1980.
(28) Ka¨rger, J.; Ruthven, D. M. J. Chem. Soc. Faraday Trans. 1981,