A novel approach for calculating packed column height based on new correlation of mass transfer coefficient

• Authors: Ahmad Rahbar-Kelishami , Hossein Bahmanyar , Zahra Hajamini
• Languages of publication: EN

Abstracts

EN

The calculation of column’s height plays an important role in packed columns precise design. This research is based on experimentally measurement of mass transfer coefficients in different heights of packed column to predict its height. The objective of presented work is to introduce a novel conceptual method to predict column height via new correlation for mass transfer coefficient. As the mass transfer coefficient is decreased with increase of column height, the HTU’s are not constant figures along the column so this new approach is called increasing HTU’s. The results of the proposed idea were compared with other correlations and the conventional method i.e. constant HTU’s. Since the results are in very good agreement with experimental data comparing to conventional method, it seems this approach can be a turning point in design of all differential columns like packed columns. Making use of this method is suggested for design of differential columns.

Keywords

EN

separation; liquid-liquid extraction; packed column; mass transfer; column design; diffusion

• Publisher: De Gruyter Open
• Journal: Polish Journal of Chemical Technology
• Year: 2015
• Volume: 17
• Issue: 1
• Pages: 48-54

Dates

published

1 - 3 - 2015

online

25 - 3 - 2015

Contributors

author

Ahmad Rahbar-Kelishami

• Iran University of Science & Technology(IUST), Faculty of chemical engineering, Narmak, Tehran, Iran

author

Hossein Bahmanyar

• University of Tehran (Iran) Engineering Collage, Chemical Engineering Faculty

author

Zahra Hajamini

• Iran University of Science & Technology(IUST), Faculty of chemical engineering, Narmak, Tehran, Iran

References

• 1. Rahbar Kelishami, A., Bahmanyar, H. & Moosavian, M.A. (2011). Prediction of mass transfer coefficients in regular packed columns, Chem. Eng. Communications 198:8, 1041-1062. DOI: 10.1080/00986445.2011.545305.[Crossref][WoS]
• 2. Ku mar, A. & Hartland, S. (1999). Co rrelations for prediction of mass transfer coefficients in single drop systems and liquid-liquid extraction columns, Institution of Chemical Engineers, Trans. IChemE. 77, Part A, 372-384. DOI: 10.1205/026387699526359.[Crossref]
• 3. Ne wman, A.B. (1931). Th e dr ying of porous solids: Diffusions and surface emission equations, Tr ans. Am. Inst. Chem. Eng. 27, 203-220.
• 4. Kronig, R. & Brink, J.C. (1950). On the theory of extraction from falling drops, Ap pl. Sci. Res. A2, 142-154. DOI: 10.1007/BF00411978.[Crossref]
• 5. Handlos, A.E. & Baron, T. (1957). Mass and heat transfer from drops in liquid-liquid extraction, AIChE J. 3, 127-136. DOI: 10.1002/aic.690030121.[Crossref]
• 6. Calderbank, P.H. & Korchinski, I.J.O. (1956) Circulation in liquid drops: a heat transfer study, Chem. Eng. Sci. 6, 65-78. DOI: 10.1016/0009-2509(56)80012-2.[Crossref]
• 7. Rose, P.M. & Kintner, R.C. (1966). Mass transfer from large oscillating drops, AIChE J. 12, 530-534. DOI: 10.1002/ aic.690120325.[Crossref]
• 8. Johnson, A.I. & Hamielec, A.E. (1960). Mass transfer inside drops, AIChE J. 6 145-149. DOI: 10.1002/aic.690060128.[Crossref]
• 9. Boyadzhiev, L., Elenkov, D. & Kyuchukov, G. (1969) On Liquid-Liquid Mass Transfer inside Drops in a Turbulent Flow Field, Can. J. Chem. Eng. 47 42-44. DOI: 10.1002/ cjce.5450470107.[Crossref]
• 10. Steiner, L. (1986). Mass-Transfer Rates from Single Drops and Drop Swarms, Chem. Eng. Sci. 41(8), 1979-1986. DOI: 10.1016/0009-2509.[Crossref]
• 11. Temos, J., Pratt, H.R.C. & Stevens, G.W. (1993). Comparison of tracer and bulk mass transfer coefficients for droplets, Proc. ISEC, Elsevier, Amsterdam, 93, 1770-1777. DOI: 10.1016/0009-2509(95)00224-3.[Crossref]
• 12. Soltanali, S., Ziaie-Shirkolaee, Y., Amoabediny, Gh., Rashedi, H., Sheikhi, A. & Chamanrokh, P. (2009). Hydrodynamics and mass transfer performance of rotating sieved disc contactors used for reversed micellar extraction of protein, Chem. Eng. Sci. 64, 2301-2306. DOI: 10.1016/j.ces.2009.02.005.[Crossref][WoS]
• 13. Lévêque, J., Rouzineau, D., Prévost, M. & Meyer, M. (2009). Hydrodynamic and mass transfer efficiency of ceramic foam packing applied to distillation, Chem. Eng. Sci. 64, 2607-2616. DOI: 10.1016/j.ces.2009.02.010.[Crossref]
• 14. Perry, R.H., Green, D.W. & Maloney, J.O. (1997) Perrys chemical engineers handbook (7th ed.), NY: McGraw-Hill.
• 15. Coulson, J.M. & Richardson, J.F. (1991). Chemical Engineering Vol. 2, 5th ed., p. 639. (Pergamon Press, Oxford.).

Identifiers

DOI

10.1515/pjct-2015-0008