Effect of Medium Capacity on the Relationship between Chemical Heterogeneity and Linearly Adsorbed Solute Dispersion into Fixed Beds
The paper aims at investigating influence of medium
capacity on linear adsorbed solute dispersion into chemically
heterogeneous fixed beds. A discrete chemical heterogeneity
distribution is considered in the one-dimensional advectivedispersive
equation. The partial differential equation is solved using
finite volumes method based on the Adam-Bashforth algorithm.
Increased dispersion is estimated by comparing breakthrough curves
second order moments and keeping identical hydrodynamic
properties. As a result, dispersion increase due to chemical
heterogeneity depends on the column size and surprisingly on the
solid capacity. The more intense capacity is, the more important
solute dispersion is. Medium length which is known to favour this
effect vanishing according to the linear adsorption in fixed bed seems
to create nonmonotonous variation of dispersion because of the
heterogeneity. This nonmonotonous behaviour is also favoured by
high capacities.
[1] S. Semra, M. Sardin, and M. O. Simonnot, "Effect of Chemical
Heterogeneity on Adsorbed Solute Dispersion at Column Scale", AIChE
J., vol. 54, no 4, pp 950-956, 2008.
[2] S. Semra, M. Sardin, and M. O. Simonnot. "A New Mixing-Cell-in-
Series Model to Predict Breakthrough Curve in Chemically
Heterogeneous Media at Column Scale", Chemical Product and Process
Modeling, vol. 4 Iss. 1, Art. 31, 2009.
[3] M. Sardin, "Modélisation du transport transitoire de solutés en milieux
poreux : Les modèles linéaires", 1993, Sciences Géologiques, Bulletin
N┬░ 46, pp 197-216.
[4] C. Zheng and G. D. Bennett. "Applied contaminant transport modeling :
Theory and practice". USA : Van Nostrand Reinhold, 1995, 440 p.
[5] M. SRADIN et al. "Modeling the nonequilibrium transport of linearly
interacting solutes in porous media : A Review". Water Resources
Research, vol. 27, no 9, pp 2287-2307, 1991.
[6] J. Villermaux. "Génie de la réaction chimique : Conception et
fonctionnement des réacteurs". Paris, France : TEC & DOCLAVOISIER,
1993, 448 p.
[7] A. Bisio, R. L. Kabel, "Scaleup of chemical processes : Conversion from
laboratory scale tests to successful commercial size design", John Wiley
& Sons, Inc., New York, U.S.A, 1985.
[8] S. Pivovarov, "Dispersion of compounds in transport processes:
Velocity dispersion model", J. of Colloid and Interface Science, vol.
289, pp 600-603, 2005.
[9] M. Sahimi. "Flow and transport in porous media and fractured rock:
From classical methods to modern approaches". Germany : VCH
Verlagsgesellschaft mbH, 1995, 482 p.
[1] S. Semra, M. Sardin, and M. O. Simonnot, "Effect of Chemical
Heterogeneity on Adsorbed Solute Dispersion at Column Scale", AIChE
J., vol. 54, no 4, pp 950-956, 2008.
[2] S. Semra, M. Sardin, and M. O. Simonnot. "A New Mixing-Cell-in-
Series Model to Predict Breakthrough Curve in Chemically
Heterogeneous Media at Column Scale", Chemical Product and Process
Modeling, vol. 4 Iss. 1, Art. 31, 2009.
[3] M. Sardin, "Modélisation du transport transitoire de solutés en milieux
poreux : Les modèles linéaires", 1993, Sciences Géologiques, Bulletin
N┬░ 46, pp 197-216.
[4] C. Zheng and G. D. Bennett. "Applied contaminant transport modeling :
Theory and practice". USA : Van Nostrand Reinhold, 1995, 440 p.
[5] M. SRADIN et al. "Modeling the nonequilibrium transport of linearly
interacting solutes in porous media : A Review". Water Resources
Research, vol. 27, no 9, pp 2287-2307, 1991.
[6] J. Villermaux. "Génie de la réaction chimique : Conception et
fonctionnement des réacteurs". Paris, France : TEC & DOCLAVOISIER,
1993, 448 p.
[7] A. Bisio, R. L. Kabel, "Scaleup of chemical processes : Conversion from
laboratory scale tests to successful commercial size design", John Wiley
& Sons, Inc., New York, U.S.A, 1985.
[8] S. Pivovarov, "Dispersion of compounds in transport processes:
Velocity dispersion model", J. of Colloid and Interface Science, vol.
289, pp 600-603, 2005.
[9] M. Sahimi. "Flow and transport in porous media and fractured rock:
From classical methods to modern approaches". Germany : VCH
Verlagsgesellschaft mbH, 1995, 482 p.
@article{"International Journal of Chemical, Materials and Biomolecular Sciences:63843", author = "K. Kaabeche-Djerafi and N. Bendjaballah-Lalaoui and S. Semra", title = "Effect of Medium Capacity on the Relationship between Chemical Heterogeneity and Linearly Adsorbed Solute Dispersion into Fixed Beds", abstract = "The paper aims at investigating influence of medium
capacity on linear adsorbed solute dispersion into chemically
heterogeneous fixed beds. A discrete chemical heterogeneity
distribution is considered in the one-dimensional advectivedispersive
equation. The partial differential equation is solved using
finite volumes method based on the Adam-Bashforth algorithm.
Increased dispersion is estimated by comparing breakthrough curves
second order moments and keeping identical hydrodynamic
properties. As a result, dispersion increase due to chemical
heterogeneity depends on the column size and surprisingly on the
solid capacity. The more intense capacity is, the more important
solute dispersion is. Medium length which is known to favour this
effect vanishing according to the linear adsorption in fixed bed seems
to create nonmonotonous variation of dispersion because of the
heterogeneity. This nonmonotonous behaviour is also favoured by
high capacities.", keywords = "linear adsorption; chemical heterogeneity;dispersion; fixed bed; porous media", volume = "5", number = "4", pages = "399-4", }