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Characterizing fluid dynamics in a bubble column aimed for the determination of reactive mass transfer

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Abstract

Bubble column reactors are multiphase reactors that are used in many process engineering applications. In these reactors a gas phase comes into contact with a fluid phase to initiate or support reactions. The transport process from the gas to the liquid phase is often the limiting factor. Characterizing this process is therefore essential for the optimization of multiphase reactors. For a better understanding of the transfer mechanisms and subsequent chemical reactions, a laboratory-scale bubble column reactor was investigated. First, to characterize the flow field in the reactor, two different methods have been applied. The shadowgraphy technique is used for the characterisation of the bubbles (bubble diameter, velocity, shape or position) for various process conditions. This technique is based on particle recognition with backlight illumination, combined with particle tracking velocimetry (PTV). The bubble trajectories in the column can also be obtained in this manner. Secondly, the liquid phase flow has been analysed by particle image velocimetry (PIV). The combination of both methods, delivering relevant information concerning disperse (bubbles) and continuous (liquid) phases, leads to a complete fluid dynamical characterization of the reactor, which is the pre-condition for the analysis of mass transfer between both phases.

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Abbreviations

d e [mm]:

equivalent bubble diameter

d B [mm]:

equivalent mean bubble diameter

U B [m/s]:

absolute rising velocity of single bubbles

U B,mean [m/s]:

absolute, mean rising velocity of bubbles

f B [1/s]:

bubble formation frequency

V B [mm3]:

bubble mean volume

A B [mm2]:

bubble mean surface area

V L [m/s]:

mean liquid velocity

C B :

bubble centricity

Eo :

Eötvös number

Fr b :

Froude number around a bubble

Fr c :

Froude number in the column

Mo :

Morton number

Re b :

Reynolds number around a bubble

Re c :

Reynolds number in the column

We b :

Weber number around a bubble

We c :

Weber number in the column

References

  1. 1.

    Besbes S, El Hajem M, Ben Aissia H, Champagne JY, Jay J (2015) PIV measurements and Eulerian–Lagrangian simulations of the unsteady gas–liquid flow in a needle sparger rectangular bubble column. Chem Eng Sci 126:560–572. https://doi.org/10.1016/j.ces.2014.12.046

  2. 2.

    Dietrich N, Francois J, Jimenez M, Cockx A, Guiraud P, Hébrard G (2015) Fast measurements of the gas-liquid diffusion coefficient in the gaussian wake of a spherical bubble. Chem Eng Technol 38(5):941–946. https://doi.org/10.1002/ceat.201400471

  3. 3.

    Hosoda S, Tryggvason G, Hosokawa S, Tomiyama A (2015) Dissolution of single carbon dioxide bubbles in a vertical pipe. J Chem Eng Jpn 48(6):418–426. https://doi.org/10.1252/jcej.14we241

  4. 4.

    Huang J, Saito T (2015) Influence of bubble-surface contamination on instantaneous mass transfer. Chem Eng Technol 38(11):1947–1954. https://doi.org/10.1002/ceat.201500056

  5. 5.

    Huang J, Saito T (2016) Influences of gas-liquid interface contamination on bubble motions, bubble wakes, and instantaneous mass transfer. Chem Eng Sci. https://doi.org/10.1016/j.ces.2016.05.013

  6. 6.

    Jimenez M, Dietrich N, Grace JR, Hébrard G (2014) Oxygen mass transfer and hydrodynamic behaviour in wastewater: determination of local impact of surfactants by visualization techniques. Water Res 58:111–121. https://doi.org/10.1016/j.watres.2014.03.065

  7. 7.

    Jimenez M, Dietrich N, Hébrard G (2013) Mass transfer in the wake of non-spherical air bubbles quantified by quenching of fluorescence. Chem Eng Sci 100:160–171. https://doi.org/10.1016/j.ces.2013.01.036

  8. 8.

    Nagami Y, Saito T (2013) Measurement of modulation induced by interaction between bubble motion and liquid-phase motion in the decaying turbulence formed by an oscillating-grid. Particuology 11(2):158–169. https://doi.org/10.1016/j.partic.2012.06.012

  9. 9.

    Rollbusch P, Bothe M, Becker M, Ludwig M, Grünewald M, Schlüter M, Franke R (2015) Bubble columns operated under industrially relevant conditions - current understanding of design parameters. Chem Eng Sci 126:660–678. https://doi.org/10.1016/j.ces.2014.11.061

  10. 10.

    Saito T, Toriu M (2015) Effects of a bubble and the surrounding liquid motions on the instantaneous mass transfer across the gas-liquid interface. Chem Eng J 265:164–175. https://doi.org/10.1016/j.cej.2014.12.039

  11. 11.

    Valiorgue P, Souzy N, Hajem ME, Hadid HB, Simoëns S (2013) Concentration measurement in the wake of a free rising bubble using planar laser-induced fluorescence (PLIF) with a calibration taking into account fluorescence extinction variations. Exp Fluids 54(4). https://doi.org/10.1007/s00348-013-1501-y

  12. 12.

    Wegener M, Paul N, Kraume M (2014) Fluid dynamics and mass transfer at single droplets in liquid/liquid systems. Int J Heat Mass Transf 71:475–495. https://doi.org/10.1016/j.ijheatmasstransfer.2013.12.024

  13. 13.

    Sathe MJ, Mathpati CS, Deshpande SS, Khan Z, Ekambara K, Joshi JB (2011) Investigation of flow structures and transport phenomena in bubble columns using particle image velocimetry and miniature pressure sensors. Chem Eng Sci 66(14):3087–3107. https://doi.org/10.1016/j.ces.2011.04.002

  14. 14.

    Sathe MJ, Thaker IH, Strand TE, Joshi JB (2010) Advanced PIV/LIF and shadowgraphy system to visualize flow structure in two-phase bubbly flows. Chem Eng Sci 65(8):2431–2442. https://doi.org/10.1016/j.ces.2009.11.014

  15. 15.

    Liu ZL, Zheng Y, Jia L, Zhang QK (2005) Study of bubble induced flow structure using PIV. Chem Eng Sci 60(13):3537–3552. https://doi.org/10.1016/j.ces.2004.03.049

  16. 16.

    Sathe M, Joshi J, Evans G (2013) Characterization of turbulence in rectangular bubble column. Chem Eng Sci 100:52–68. https://doi.org/10.1016/j.ces.2013.01.004

  17. 17.

    Bitog JPP, Lee IB, Oh HM, Hong SW, Seo IH, Kwon KS (2014) Optimised hydrodynamic parameters for the design of photobioreactors using computational fluid dynamics and experimental validation. Biosyst Eng 122:42–61. https://doi.org/10.1016/j.biosystemseng.2014.03.006

  18. 18.

    Dietrich N, Loubière K, Jimenez M, Hébrard G, Gourdon C (2013) A new direct technique for visualizing and measuring gas-liquid mass transfer around bubbles moving in a straight millimetric square channel. Chem Eng Sci 100:172–182. https://doi.org/10.1016/j.ces.2013.03.041

  19. 19.

    Haggerty R, Argerich A, Martí E (2008) Development of a “smart” tracer for the assessment of microbiological activity and sediment-water interaction in natural waters: the resazurin-resorufin system. Water Resour Res 44(4):W00D01.https://doi.org/10.1029/2007WR006670

  20. 20.

    Sanchez-Forero DI, Costa KK, Amaral RL, Taranto OP, Mori M (2015) Influence of liquid viscosity and solid load in a three-phase bubble column using stereoscopic particle image velocimetry (stereo-PIV). Chem Eng Trans 43:1579–1584. https://doi.org/10.3303/CET1543264

  21. 21.

    Zhou X, Doup B, Sun X (2013) Measurements of liquid-phase turbulence in gas-liquid two-phase flows using particle image velocimetry. Meas Sci Technol 24 (12):art.No. 125303. doi:https://doi.org/10.1088/0957-0233/24/12/125303

  22. 22.

    Becker S, De Bie H, Sweeney J (1999) Dynamic flow behaviour in bubble columns. Chem Eng Sci 54(21):4929–4935. https://doi.org/10.1016/S0009-2509(99)00214-6

  23. 23.

    Pfleger D, Becker S (2001) Modelling and simulation of the dynamic flow behaviour in a bubble column. Chem Eng Sci 56(4):1737–1747. https://doi.org/10.1016/S0009-2509(00)00403-6

  24. 24.

    Reactive Bubbly Flows - Bubble Column Reactor Database. (2015). http://www.uni-magdeburg.de/isut/LSS/spp1740/

  25. 25.

    Kováts P, Thévenin D, Zähringer K (2017) Investigation of mass transfer and hydrodynamics in a model bubble column. Chem Eng Technol. https://doi.org/10.1002/ceat.201600679

  26. 26.

    Zähringer K, Wagner L-M, Kováts P, Thévenin D (2014) Experimental characterization of the mass transfer from gas to liquids in a two-phase bubble column. Paper presented at the 7th international berlin workshop on transport phenomena with moving boundaries and more, berlin, Germany, 30th-31st October 2014

  27. 27.

    Lehwald A, Thévenin D, Zähringer K (2010) Quantifying macro-mixing and micro-mixing in a static mixer using two-tracer laser-induced fluorescence. Exp Fluids 48(5):823–836. https://doi.org/10.1007/s00348-009-0769-4

  28. 28.

    Bordas R, Roloff C, Thevenin D, Shaw RA (2013) Experimental determination of droplet collision rates in turbulence. New J Phys 15:045010. https://doi.org/10.1088/1367-2630/15/4/045010

  29. 29.

    Mendelson HD (1967) The prediction of bubble terminal velocities from wave theory. AICHE J 13:250–253. https://doi.org/10.1002/aic.690130213

  30. 30.

    Clift R, Grace JR, Weber ME (1978) Bubbles, drops, and particles. Academic Press, New York

  31. 31.

    Baz-Rodriguez S, Aguilar-Corona A, Soria A (2012) Rising velocity for single bubbles in pure liquids. Rev Mex Ing Quim 11(2):269–278

  32. 32.

    Fan LSTK (1990) Bubble wake dynamics in liquids and liquid-solid suspensions. Butterworth-Heinemann, Massachusetts, USA

  33. 33.

    Lehrer IH (1976) A rational terminal velocity equation for bubbles and drops at intermediate and high Reynolds numbers. J Chem Eng Jpn 9:237–240

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Acknowledgements

This work has been financially supported by the German research foundation (DFG) in the framework of the SPP 1740 “Reactive Bubbly Flows” under project number ZA-527/1-1.

The authors would also like to thank the students Niklas Brandt and Tim André Kulbeik for their help in doing the experiments. The help of C. Kisow and S. Herbst for building the bubble column is gratefully acknowledged.

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Correspondence to Péter Kováts.

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Kováts, P., Thévenin, D. & Zähringer, K. Characterizing fluid dynamics in a bubble column aimed for the determination of reactive mass transfer. Heat Mass Transfer 54, 453–461 (2018). https://doi.org/10.1007/s00231-017-2142-0

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Keywords

  • Bubble column reactor
  • CO2
  • PIV
  • Shadowgraphy
  • Two-phase flow
  • Two-tracer-LIF