Abstract
Adsorption amounts of solvent vapors such as n-hexane, toluene, and MEK on two commercial activated carbons (SLG-2PS and X-7000) were measured experimentally using a quartz spring balance connected with a high vacuum system. Single-species equilibrium data show typical type II isotherms, which are most frequently encountered in separation processes. Equilibrium data obtained at relative vapor pressures less than 0.3 were fitted to four well-known isotherms such as Langmuir, Freundlich, Sips, and Dubinin-Astakov (D-A) equations. All isotherm equations were found to describe experimental equilibrium data satisfactorily. Only the Langmuir equation was not proper to fit the equilibrium data of solvent vapors on SLG-2PS. In order to evaluate the adsorption energy distribution of the solvent vapors on activated carbons, a simple model based on the condensation approximation (CA) approach was applied. According to the result, it was proven that two carbons have energetically heterogeneous surfaces.
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References
Chihara, K., Mellot, C. E, Cheetham, A. K., Hams, S., Mangyo, H., Omote, M. and Kamiyama, R., “Molecular Simulation for Adsorption of Chlorinated Hydrocarbon in Zeolites,”Korean J. Chem. Eng.,17, 649 (2000).
de Boer, J. H., “The Structure and Properties of Porous Materials,” Butterworths, London (1958).
Jaroniec, M. and Madey, R., “Physical Adsorption on Heterogeneous Solids”, Elsevier, New York (1988).
Langmuir, I., “The Adsorption of Gases on Plane Surfaces of Glass, Mica and Platinum”,J. Amer. Chem. Soc,40,1361 (1918).
Lee, J. W., Park, H C. and Moon, H., “Adsorption and Desorption of Cephalosporin C on Nonionic Polymeric Sorbents”,Sep. Purif. Technol,12,1 (1997).
Manes, M., “Fundamentals of Adsorption”, Edited by Myers and Belfort, 335 (1984).
Moon, H. and Tien, C., “Incorporation of the Potential Theory into Liquid-Phase Multicomponent Adsorption Calculations”,Chem. Eng. Sci.,43,1269 (1988).
Mukhopadhyay, N. and Moreti, E. C., “Current & Potential Future Industrial Practices for Reducing and Controlling Volatile Organic Compounds”, American Institute of Chemical Engineers, New York (1993).
Ruddy, E. N. and Carroll, L. A., “Select the Best VOC Control Strategy,”Chem. Eng. Progress,89, 28 (1993).
Rudzinski, W. and Everett, D. H., “Adsorption of Gases on Heterogeneous Surfaces”, Academic Press, New York (1994).
Ruthven, D. M., “Principles of Adsorption and Adsorption Processes”, John Wiley Sons, New York (1984).
Takeuchi, Y. and Shigeta, A., “Adsorption of Binary and Ternary Organic Solvent Vapor in Air by a Fixed Bed of Granular Activated Carbon,”J. Chem. Eng. Japan,24,411 (1991).
Yang, R. T., “Gas Separation by Adsorption Processes”, Butterworths, New York (1987).
Yun, J. H., Choi, D. K. and Moon, H., “Benzene Adsorption and Hot Purge Regeneration in Activated Carbon Beds”,Chem. Eng. Sci.,55, 5857 (2000).
Yun, J. H., Choi, D. K., Kim, S. H. and Moon, H., “Effects of Non-isothermal Adsorption Equilibria of Gas Mixtures on Column Dynamics”,Korean J. Chem. Eng.,14, 369 (1997).
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Kim, D.J., Shim, W.G. & Moon, H. Adsorption equilibrium of solvent vapors on activated carbons. Korean J. Chem. Eng. 18, 518–524 (2001). https://doi.org/10.1007/BF02698300
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DOI: https://doi.org/10.1007/BF02698300