Faculty of Chemical and Biomedical Engineering

Dr. Dhananjai B. Shah

Dr. Bahman Ghorashi Professor and Chairperson
Ph.D., Chemical Engineering

Michigan State University

Adsorption and Diffusion in Zeolites, Dynamic Behavior of Adsorption Columns, Transport Phenomena and Wastewater Treatment.

Research Projects

Diffusion In Zeolites

As an outgrowth of our synthesis program, research is underway to study the diffusion of gases in zeolites. Considerable discrepancies exist in the literature over the values of diffusion coefficients for the simplest gas/zeolite systems. With the use of large zeolites crystals, many of these concerns have been resolved. We have developed a new insight into the transport of gases in these microporous solids.

Adsorption and Diffusion in Zeolites by Pulse Chromatography

Pulse chromatographic technique has been successfully used to determine the pure component and binary sorption equilibria and diffusion coefficients of various adsorbates in zeolites. The experimental technique and the method of data analysis is simple. The method, along with the gravimetric technique is being used to study sorption and diffusion of various adsorbates in zeolites.

Dynamic Behavior of Adsorption Columns

Dynamic behavior of adsorption column has been studied extensively for single component adsorption. However, most of these studies have used adsorption from dilute solutions. Under these conditions, one can assume constant fluid phase velocity through the bed and isothermal operation. These assumptions are not valid for the case of bulk adsorption. Work is in progress to experimentally measure the breakthrough curves for bulk adsorption and compare them with the predictions from a model that accounts for the changing velocity of the fluid phase and the nonisothermal nature of the adsorption.


Selected Publications
  1. Heinke, L., Chmelik, C., Kortunov, P., Shah, D.B., Brandani, S., Ruthven, D.M., Kaerger, J., “Analysis of Thermal Effects in Infra-Red and Interference Microscopy: n-Butane-5A and Methanol-Ferrierite Systems”, Microporous & Mesoporous Materials, In Press, 2006.
  2. Kortunov, P., Heinke, L., Vasenkov, S., Chmelik, C., Shah, D.B., Karger, J., Rakoczy, R.A., Traa, Y., Weitkamp, J., Internal Concentration of Guest Molecules in Nanoporous Host Materials: Measurement and Microscopic Analysis, J. Phys. Chem. B., Manuscript published online October 18th, 2006.
  3. Kärger, J., Kortunov, P., Vasenkov, S., Heinke, L., Shah, D.B., Rakoczy, R.A., Traa, Y., Weitkamp, J., Unprecedented Insight into Diffusion by Monitoring Concentrations in Nanoporous Materials, Angewandte Chemie Int. Ed., Published online October 25th, 2006.
  4. Jun-Hai Guo, D.B. Shah and O. Talu, “Determination of Effective Diffusivities in Commercial Pellets: Effect of Water Loading,” Industrial Engineering Chemistry Research, In Press, 2006.
  5. D.B. Shah, O.Talu, J. Chheda and X. Zhang, “Binary Diffusion in Silicalite: Theory and Experiments,” Proceedings of 7th International Conference on Fundamentals of Adsorption, Editors: K. kaneko and Y. Hanzawa, 740-746, IK International, Chiba-City, Japan, 2002
  6. Junhai Guo, D.B. Shah and O. Talu, “Effect of Water Loading On Effective Diffusivity in Industrial Adsorbents” Proceedings of 2nd Pacific Basin Conference on Adsorption Science and Technology, Editor: D.D. Do, World Scientific, Singapore, p558-562, 2000.
  7. Junhai Guo, D.B. Shah and O. Talu, “Transport Through a Single Commercial Adsorbent Pellet/Bead by Steady-State Wicke-Kallenbach Technique,” Proceedings of Sixth International Conference on Fundamentals of Adsorption, Editor: F. Meunier, 1194-1200, Elsevier, 1998.
  8. O. Talu, D.B. Shah, Matthew Sun and H.H. Xu, “Steady-State Measurement of Binary Diffusion Using Single Crystal membrane Technique,” Proceedings of Sixth International Conference on Fundamentals of Adsorption, Editor: F. Meunier, 1201-1206, Elsevier, 1998.
  9. O. Talu, S. Sun and D.B. Shah, "Application of Single Crystal Membrane (SCM) Technique: Diffusion of C5-C10 Hydrocarbons in Silicalite," AIChE J., 44, 681-694, 1998.
  10. M.S. Sun, D.B. Shah, H.H. Xu and Orhan Talu, "Adsorption of Equilibria of C1-C4 Alkanes, CO2 and SF6 on Silicalite," J. Phys. Chem.,102, 1466-1473, 1998.
  11. N.H. Dural and D.B. Shah, "Incorporation of Pollution Control Principles and Technologies into Chemical Engineering Curriculum," Inter. J. Eng. Edu., 13(5), 358-362, 1997
  12. H. Xu, D.B. Shah and O. Talu, "Synthesis of ZSM-5 Films at Elevated Gravity," Zeolites, 19, 114-122, 1997.
  13. S. Sun, O.Talu and D.B. Shah, "Adsorption Equilibria of C5-C10 Normal Alkanes in Silicalite Crystals," J. Phys. Chem., 100, 17276-17280, 1996
  14. S. Sun, O. Talu and D.B. Shah, "Diffusion Measurements Through Embedded Zeolite Crystals," AIChE J., 42, 3001-3007, 1996
  15. O. Talu, D.B. Shah and S. Sun, "Molecular Diffusion in a Single Zeolite Crystal," Proceedings of the Fifth Fundamentals of Adsorption Conference, M. D. LeVan (Editor), Kluwer Academic Press, 953-960, 1996.
  16. D.B. Shah, S.P. Perera and B.D. Crittenden, "Adsorption Dynamics In a Monolithic Adsorbent," Proceedings of the Fifth Fundamentals of Adsorption Conference, M. D. LeVan (Editor), Kluwer Academic Press, 813-821, 1996.
  17. J.M. Kmit and D.B. Shah, "Pseudo-Steady-State-Approximation: A Powerful Tool in Solving Multi-Time-Scale Problems," Chem. Eng. Ed., 30 (1), 14-19, 1996.

Recent Presentations
  1. P. Kortunov, L. Heinke, S. Vasenkov, D.B. Shah, J. Kärger, R.A. Rackoczy, Y. Traa, J. Weitkamp, “Microscopic Determination of Local Molecular Diffusivities in Nanoporous Materials”, Presented at XXIX Annual British Zeolite Association Conference, St. Martin’s College, Ambleside, UK, 30 July-4 August, 2006.
  2. D.B. Shah, “Studies of Adsorption and Diffusion in Silicalite by Single Crystal Membrane Technique”, Invited Key Note Lecture presented to 18th German Zeolite Association meeting, March 1-3, 2006, Hanover, Germany.
  3. S. Brandani, V. Bourdin, H. Jobic, J. Kärger, C. Crause, M. Krutyeva, D.B. Shah, W. Schmidt, “Benefit and Problems of the Application of Different Techniques of Diffusion Measurement: n-Alkanes in Zeolites ZSM-5 and Silicalite-1”, 18th German Zeolite Association meeting, March 1-3, 2006, Hanover, Germany.
  4. H. Jobic, S. Brandani, J. Caro, X. Yang, J. Kärger, C. Crause, A. Möller, R. Staudt, and D.B. Shah, “A Concerted Diffusion Study of n-Alkanes in Zeolite NaCaA”, 18th German Zeolite Association meeting, March 1-3, 2006, Hanover, Germany
  5. D.B. Shah and Ellie Chaloub, “Measurement of Argon and Helium Diffusivities in Silicalite by Static Single Crystal Membrane,” Diffusion Fundamentals I, September 22-25, 2005, Leipzig, Germany.
  6. D.B. Shah, “Theories of Multicomponent Diffusivities in Zeolites: Status and Opportunities,” Eighth International Conference on Fundamentals of Adsorption Sedona, Arizona May 23-27, 2004.
  7. D.B. Shah, O.Talu, J. Chheda and X. Zhang, “Binary Diffusion in Silicalite: Theory and Experiments,” Seventh International Conference on Fundamentals of Adsorption, May 20-25, 2001, Nagasaki, Japan.
  8. D.B. Shah, O. Talu, S. Gumma, "Calculation of spreading pressure, activity coefficients and thermodynamic consistency for adsorption equilibrium data", Seventh International Conference on Fundamentals of Adsorption, May 20-25, 2001, Nagasaki, Japan.
  9. S. Gumma, D.B. Shah and O. Talu, “Co-Adsorption Equilibria of C1-C2 and C1-C4 Mixtures on Silicalite,” 2001 Midwest Thermodynamics & Statistical Mechanics Conference, Michigan State University, East Lansing, May 7-8, 2001.
  10. D.B. Shah, “Testing for proficiency in chemical engineering courses,” Regional Conference of American Society for Engineering Education, April6-7, 2001, Cleveland, Ohio
  11. J. Chheda, H. Zhang, D.B. Shah and O. Talu, “Theories of Multi-component Diffusion in Zeolites,” Annual Meeting of American Institute of Chemical Engineers in Los Angeles, November 12-17, 2000.
  12. D.B. Shah, O. Talu, S. Gumma, " Binary equilibria of methane and n-butane on silicalite",., In Fundamentals of Adsorption and Ion Exchange Session, AIChE Annual Meeting, November, 2000, Los Angeles, CA, USA.
  13. Junhai Guo, D.B. Shah and O.Talu, “Effect of Water Loading on Effective Diffusivity in Industrial Adsorbents,” 2nd Pacific Basin Conference on Adsorption Science and Technology, Brisbane, Australia, May 14-18, 2000. Paper accepted for presentation but unable to attend due to funding problem
  14. D.B. Shah, Orhan Talu and X.Zhang, “Measurement of Binary Diffusivities with Single Crystal Membrane Technique,” 1999 Annual Meeting of American Institute of Chemical Engineers, Dallas, Texas, November 1999.
  15. Guo J.H., D.B. Shah and O. Talu, “ Transport of Hydrocarbons in Water Loaded Industrial 5A and 13X Pellets,” American Institute of Chemical Engineers Annual Meeting, Miami Beach, Florida, November 15-20, 1998.
  16. D.B. Shah, O. Talu Matthew Sun and H. Zhang, “Investigation of Dependence of Corrected Diffusivity On Loading by Single Crystal Membrane Technique,” American Institute of Chemical Engineers Annual Meeting, Miami Beach, Florida, November 15-20, 1998.
  17. Guo, J.-H., D.B. Shah and O. Talu, "Transport Through a Single Commercial Adsorbent Pellet/Bead by Dynamic Wicke-Kallenbach Technique," presented at the Sixth International Conference on Fundamentals of Adsorption, Presqu'ile de Giens, France, May 1998.
  18. O. Talu, D.B. Shah, Matthew Sun and Heather Xu, “Steady-State Measurements of Binary Permeation Through Microporous Membranes,” presented at the Sixth International Conference on Fundamentals of Adsorption, Presqu'ile de Giens, France, May 1998.
  19. S. Sun, O. Talu and D.B. Shah, "Binary Diffusion Coefficients in a Single Silicalite Crystal," AIChE Annual Meeting, November 16-21, Los Angeles, 1997.
  20. H. Xu, D.B. Shah and O. Talu, "Separation of Light Alkanes with Silicalite Membranes," AIChE Annual Meeting, November 16-21, Los Angeles, 1997.
  21. J. Guo, D.B. Shah and O. Talu, "Diffusion of Hydrocarbons Through Single Pellets of Zeolites: Application of Wicke-Kallenbach Technique," AIChE Annual Meeting, November 16-21, Los Angeles, 1997.
  22. S. Sun, O. Talu and D.B. Shah, "Binary Diffusion Coefficients in a Single Silicalite Crystal," AIChE Annual Meeting, Chicago, November 1996
  23. H. Xu, D.B. Shah and O. Talu, "Synthesis of Zeolite Membranes at Elevated Gravity," AIChE Annual Meeting, Chicago, November 1996.
  24. D.B. Shah, O. Talu, X.I. Lu and H. Xu, "Moderation of Ammonium Concentration Spikes in Industrial Wastewater with Clinoptiolite," AIChE Annual Meeting, Miami, November 1995.

If you have questions, comments, or suggestions, or need additional information, you can leave me a message at: shah@csvax.csuohio.edu

engaged learning
Mailing Address
Chemical and Biomedical Engineering Department
Fenn College of Engineering
Cleveland State University
2121 Euclid Ave., SH 455
Cleveland, Ohio 44115-2214
Campus Location
Stilwell Hall Room 455
1960 East 24th Street
Phone: 216.687.2569
Fax: 216.687.9220
ChE@csuohio.edu
Contact
Jorge E. Gatica
j.gatica@csuohio.edu
Phone: 216.523.7274


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