Adsorption and Desorption of Volatile Organic Compounds in Fluidized Bed
Publication: Journal of Environmental Engineering
Volume 132, Issue 5
Abstract
A model of adsorption and thermal desorption was built and validated from experiments performed under various operating conditions. The abatement increased with the reduction in the inlet concentration and with the increase of bed height. Particles at the end of adsorption step were saturated although their pores were not completely filled with acetone. Adsorption yielded an increase of the bed temperature at the beginning of the tests, where the separation rate had the maximum value nearly equal to 100%, but the temperature rise of the bed remained much smaller than that obtained in fixed-bed adsorption for similar conditions. Simulations of a process operating with successive cycles of adsorption and thermal desorption was then performed. Desorption appeared to have a reasonable duration compared to adsorption. Calculations proved that a third reactor for transient states from adsorption to desorption or from desorption to adsorption that would achieve the cooling or the heating of particles was not necessary. Results show the feasibility of the adsorption–desorption process of volatile organic compounds in fluidized beds of granular activated carbon.
Get full access to this article
View all available purchase options and get full access to this article.
References
Bories, S., and Prat, M. (2000). “Transferts de chaleur dans les milieux poreux. Technique de l’Ingénieur: Traité génie énergétique.” BE3(B8 250), 1–33 (in French).
Chiang, B.-C., Wey, M.-Y., and Yang, W.-Y. (2000). “Control of incinerator organics by fluidized bed activated carbon adsorber.” J. Environ. Eng., 126(11), 985–992.
Class, H., Helmig, R., and Bastian, P. (2002). “Numerical simulation of non-isothermal multiphase multicomponent processes in porous media. 1. An efficient solution technique.” Adv. Water Resour., 25, 533–550.
Danielsson, M. A., and Hudon, V. (1994). “VOC emission control using a fluidized bed adsorption system.” Met. Finish., 92(6), 89–91.
Delage, F. (2000). “Echauffement des lits de charbon actif lors de l’adsorption de composés organiques volatils: Étude expérimentale et modélisation.” Ph.D. thesis, Ecole des Mines de Nantes, Univ. de Poitiers, France (in French).
Delage, F., Pré, P., and Le Cloirec, P. (2000). “Mass transfer and warming during adsorption of high concentrations of VOCs on an activated carbon bed: Experimental and theoretical analysis.” Environ. Sci. Technol., 34, 4816–4821.
De Vries, D. A. (1987). “The theory of heat and moisture transfer in porous media revisited.” Int. J. Heat Mass Transfer, 30, 1343–1350.
Hager, J., Wimmerstedt, R., and Whitaker, S. (2000). “Steam drying a bed of porous spheres: Theory and experiment.” Chem. Eng. Sci., 55, 1675–1698.
Kornev, K. G., Shingareva, I. K., and Neimark, A. V. (2002). “Capillary condensation as a morphological transition.” Adv. Colloid Interface Sci., 96, 143–167.
Kunii, D., and Levenspiel, O. (1991). Fluidization engineering, Butterworth-Heinemann, Boston.
Le Cloirec, P. (1998). Les composés organiques volatils dans l’environnement, Tech et Doc.
Litong, Z., Gray, D. M., and Male, D. H. (1997). “Numerical analysis of simultaneous heat and mass transfer during infiltration into frozen ground.” J. Hydrol., 200, 345–363.
Moyne, C., Bastale, J. C., and Degiovanni, A. (1988). “Approche expérimentale et théorique de la conductivité thermique des milieux poreux humides—II. Théorie.” Int. J. Heat Mass Transfer, 31, 2319–2330.
Neimark, A. V., Ravikovith, P. I., and Vishnyakov, A. (2003). “Bridging scales from molecular simulations to classical thermodynamics: Density functional theory of capillary condensation in nanopores.” J. Phys.: Condens. Matter, 15, 347–365.
Reichhold, A., and Hofbauer, H. (1995). “Internally circulating fluidized bed for continuous adsorption and desorption.” Chem. Eng. Process., 34, 521–527.
Sanders, R. E. (2003). “Designs that lacked inherent safety: Case histories.” J. Hazard. Mater., 104, 149–161.
Sheshukov, A. Y., and Egorov, A. G. (2002). “Frozen barrier evolution in saturated porous media.” Adv. Water Resour., 25, 591–599.
Sircar, S., Golden, T. C., and Rao, M. B. (1996). “Activated carbon for gas separation and storage.” Carbon, 34(1), 1–12.
Wang, Z. H., and Chen, G. (2000). “Heat and mass transfer in batch fluidized-bed drying of porous particles.” Chem. Eng. Sci., 55(10), 1857–1869.
Wu, Y.-S., and Forsyth, P. A. (2002). “On the selection of primary variables in numerical formulation for modeling multiphase flow in porous media.” J. Contam. Hydrol., 48, 277–304.
Wyrwal, J., and Marynowicz, A. (2002). “Vapour condensation and moisture accumulation in porous building.” Wall Building and Environment, 37, 313–318.
Yazbek, W., and Delebarre, A. (2004). “Modeling of volatile organic compounds condensation in fluidized bed.” Chem. Eng. Sci., 59, 283–297.
Yazbek, W., and Delebarre, A. (2005). “Separation of volatile compounds by condensation in a fluidized bed.” Chem. Eng. Sci., 60, 577–588.
Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 132 • Issue 5 • May 2006
Pages: 442 - 452
Copyright
© 2006 ASCE.
History
Received: Apr 1, 2004
Accepted: Sep 14, 2005
Published online: May 1, 2006
Published in print: May 2006
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.