Determination of Interfacial Area in Gas-Liquid Two Phase by Light Transmission

Document Type : Research Note

Authors

Faculty of Chemical & Petroleum Engineering, Sharif University of Technology, Tehran, I.R. IRAN

Abstract

The purpose of the present paper is to develop light beam method to measurement of interfacial area in a rectangular gas-liquid bubble column. Total interfacial area can be determined in bubble column filled by transparent liquid by light transmission method. According to pervious researches, the fraction of parallel light is function of interfacial area and optical path length that these two parameters imply Transmission Number or NT.The drop diameters were measured in the range of 2.2 to 5 mm, and in this range, the specific area is found to depend only upon the light transmission. Three different systems with various liquid phases have been used in this work.It had been proved that light transmission method for dilute suspension or stationary gas phase has a good consequence. In this work, good agreement between actual and calculated interfacial area proves that light transmission method would be able to determine interfacial area in multiple scattering, and it is possible to use earlier mathematic model to measure interfacial area in multiple scattering in gas-liquid bubble columns.

Keywords

Main Subjects

References

[1] De Swart j.W.A., Krishna R., Effect of Article Concentration on the Hydrodynamics of Bubble Column Slurry Reactors, Chem. Eng. Res. Design., Trans. Ind. chem. Eng., 73, p. 308 (1995).
[2] Jager B., Espinoza R., Advances in Low Temperature Ficher-Tropsch Synthesis, Catalyst Today, 23(1), p. 17 (1995).
[3] Shollenberger K.A., Torczynski J.R., Adkins D.R., O’Hem T., Jakson N.B., Gamma-Densitometery Tomography of Gas Holdup Spatial Distribution in Industrial Scale Bubble Column, Chem Eng Sci., 52, p. 2037 (1997).
[4] Eishenberg B., Ansel L.L., Fiato R.A., Bauman R.F., Advanced Gas Conversion Technology for Remote Natural Gas Utilization, GPA Convention, New Orleans, LA (1994).
[5] Davis B.H., Overview of Reactor for Liquid Phase Fischer-Topsch Synthesis, Catalyst Today, 71(3-4), p. 249 (2002).
[6] Yang G.Q., Luo X., Lao R., Heat-Transfer Characteristics in Slurry Bubble Columns at Elevated Pressures and Tempratures, Ind. Eng. Chem. Res., 39, p. 2568 (2000).
[7] Rose H.E, H.B. Lloyd, On The Measurement of the Size Characteristics of Powders by Photo-Extenction Methods 1. Theoretical Consideration, J. Soc. Chem. Ind., 65, p. 5 (1946).
[8] Boll R.H., C.M. Sliepcevich., Evaluation of Error of Optical Origin Arising in the Size Analysis of Dispersion by Light Transmission, J. Opt. Soc. Am., 46, p. 200 (1956).
[9] Dobbins R.L., Jizmagian G.S., Optical Scattering Cross Sections for Polydispersions of Dielectric Sphere, AIChE J., 20, p. 184 (1974).
[10] Calderbank P.H., Physical Rate Process in Industrial Fermentation, Part 1 : The Interfacial Area in Gas-Liquid Contacting with Mechanical Agitation, Trans.  Inst. Chem.  Engrs., 36, p. 443 (1958).
[11] Lee J.C., Ssali, G.W.K., Bubble Transport and Coalescence in a Vertical Pipe , Joint Meeting on Bubble and Foams,  S1-6.1 , Verfahrenstechnische Gesellschaft im VDI Inst., Chem. Engrs., Nurenberd (1971).
[12] Trice V.G., Rodger W.A., Light Transmittance as a Measure of Interfacial Area in Liquid-Liquid Dispersion, AIChE J., 2, p. 205 (1956).
[13] Patel S.A., Daly J.G., Bukur D.B., Bubble Size Distribution in Fischer-Tropsch Waxes in a Bubble Column, AIChE J., 36, p. 93 (1996).
[14] Akita K., Yoshida F., Gas Holdup and Volumetric Mass Transfer Coefficient in Bubble Columns. Effect of Liquid Properties, Ind. Eng. Chem. Process. Des. Dev., 12, p.76 (1974).
[15] Luewisutthichat, Tsutsumi, Zdrojkowski, Bubble Cractristics in Multi-Phase Flow Systems: Bubble Sizes and Size Distribution, J. Chem. Eng. Jpn., 30, p. 461 (1999).
[16] Kulkarni A.A., Joshi J.B., Kumar V.R., Kulkarni B.D., Simultaneous Measurement of Holdup Profiles and Interfacial Area Using LDA in Bubble Column : Predictions by Multiresolution Analysis and Comparison with Experiments, Chem. Eng. Sci., 56, p. 6437 (2001).
[17] Kiambi S.L., Duquenne A.M., Bascoul A., Delmas H., Measurements of Local Interfacial Area: Application of Bi-Optical Fiber Technique, Chem Eng Sci., 56, p. 6447 (2001).
[18] Wu Q., Ishii M., Sensitivy Study on Double-Sensor Conductivity Probe for the Measurement of Interfacial Area Concentration in Bubbly Flow, Int. J. Multi Flow, 25, p. 155 (1994).
[19] Stegman D., Knop P.A., Wijnads A.J.G., Westertern K.R. Interfacial Area and Gas Holdup in a Bubble Column Reactor at Elevated Pressure, Ind. Eng. Chem. Res., 35, p. 3842 (1996).
[20] Vazquez G., Cancela M.A., Riverol C., Alvarez E., Navaza J.M., Determination of Interfacial Areas in
a Bubble Column by Different Chemical Methods, Ind. Eng. Chem. Res., 39, p. 2541 (2000).
[21] Mie P., Ann.Pys. Lpz., 33, p. 1275 (1910).
[22] Sinclair D., "Handbook of Aerosols", Ch. 7, Washington , D.C. :Atomic Energy Commission (1950).
[23] Chiao-Min-Chu., J. phys. Chem., 59, p. 841 (1955).
[24] Sheppard P.A., The Effect of Pollution on Radiation in the Atmosphere, Intern. J. Air pollut., 1, p. 31 (1958)
[25] McLaughlin C.M., Rushton J.H., Interfacial Area of Liquid-Liquid Dispersion from Light Transmission Measurements, AIChE J., 19, p.817 (1973).
[26] Garnier C., Lance M., Marié,J., Measurement of Local Flow Characteristics in Buoyancy-Driven Bubbly Flow at High Void Fraction, Experimental Thermal and Fluid Science, 26, p. 811 (2002).

Files

Share

How to cite

Statistics