Energetic efficiency of mass transfer accompanied by chemical reactions in liquid-liquid systems

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Abstract

Energetic efficiency depicting the fraction of energy dissipation rate used to perform processes of drop breakup and mass transfer in two-phase, liquid-liquid systems is considered. Results of experiments carried out earlier in two types of high-shear mixers: an in-line rotor-stator mixer and a batch rotor-stator mixer, have been applied to identify and compare the efficiency of drop breakage and mass transfer in both types of mixers. The applied method is based on experimental determination of both: the product distribution of chemical test reactions and the drop size distributions. Experimental data are interpreted using a multifractal model of turbulence for drop breakage and the model by Favelukis and Lavrenteva for mass transfer. Results show that the energetic efficiency of the in-line mixer is higher than that of the batch mixer; two stator geometries were considered in the case of the batch mixer and the energetic efficiency of the device equipped with a standard emulsor screen (SES) was higher than the efficiency of the mixer equipped with a general purpose disintegrating head (GPDH) for drop breakup but smaller for mass transfer.

Bałdyga J. and Podgórska W., 1988. Drop break-up in intermittent turbulence. Maximum stable and transient sizes of drops. Can. J. Chem. Eng., 76, 456-470. DOI: 10.1002/cjce.5450760316.

Bałdyga J., Jasińska M., 2011. Effect of model structure on complex liquid-liquid heterogeneous reactions. Proceedings of the third European Process Intensification Conference, EPIC2011, 20-23 June 2011, Manchester, UK, 175-181.

Bałdyga J., Kowalski A., Cooke M., Jasińska M., 2007. Investigations of micromixing in a rotor-stator mixer. Chem. Process Eng., 28 (4), 867-877.

Batchelor G.K., 1980. Mass transfer from a particle suspended in turbulent fluid. J. Fluid Mech., 98, 609-623. DOI: 10.1017/S0022112080000304.

Doraiswamy L.K., Sharma M.M., 1984. Heterogeneous reactions: Analysis, examples, and reactor design. Vol. 2: Fluid-fluid-solid reactions. Wiley, New York.

Favelukis M., Lavrenteva O.M., 2013. Mass transfer around prolate spheroidal drops in an extensional flow. Can. J. Chem. Eng., 91, 1190-1199. DOI: 10.1002/cjce.21727.

Hall S., Pacek A., Kowalski A.J., Cooke M., Rothman D., 2013. The effect of scale and interfacial tension on liquid–liquid dispersion in in-line Silverson rotor–stator mixers. Chem. Eng. Res. Des., 91, 2156-2168. DOI: 10.1016/j.cherd.2013.04.021.

Jasińska M., Bałdyga J., Cooke M., Kowalski A., 2016. Mass transfer and chemical test reactions in the continuous-flow rotor-stator mixer. Theor. Found. Chem. Eng., 50, 901-906. DOI: 10.1134/S0040579516060075.

Jasińska M., Bałdyga J., Cooke M., Kowalski A.J., 2013a. Investigations of mass transfer with chemical reactions in two-phase liquid-liquid systems. Chem. Eng. Res. Des., 91, 2169-2178. DOI: 10.1016/j.cherd.2013.05.010.

Jasińska M., Bałdyga J., Cooke M., Kowalski A.J., 2013b. Application of test reactions to study micromixing in the rotor-stator mixer (test reactions for rotor-stator mixer). Appl. Therm. Eng., 57, 172-179. DOI: 10.1016/j.applthermaleng.2012.06.036.

Jasińska M., Lewandowski P., Bałdyga J., 2013. Nowy model wnikania masy z reakcją chemiczną w układach heterofazowych ciecz-ciecz. Inżynieria i Aparatura Chemiczna, 52 (4), 325-327.

Levich V.G., 1962. Physical hydrodynamics. Prentice-Hall, Englewood Cliffs, N.J.

Malecha K., Golonka L.J., Bałdyga J., Jasińska M., Sobieszuk P., 2009. Serpentine microfluidic mixer made in LTCC. Sens. Actuators B: Chem., 143, 400-413. DOI: 10.1016/j.snb2009.08.010.

Padron G.A., 2001. Measurement and comparison of power draw in batch rotor-stator mixers. M.Sc. Thesis, University of Maryland, College Park, MD, USA.

Reuger P., Calabrese R.V., 2013. Dispersion of water into oil in a rotor-stator mixer. Part 1: Drop breakup in dilute systems. Chem. Eng. Res. Des., 91, 2122-2133. DOI: 10.1016/j.cherd.2013.05.018

Utomo A.T., 2009. Flow patterns and energy dissipation rates in batch rotor-stator mixers. PhD Thesis, School of Engineering, The University of Birmingham, Edgbaston, UK.

Chemical and Process Engineering

The Journal of Committee of Chemical and Process of Polish Academy of Sciences

Journal Information


IMPACT FACTOR 2016: 0.971

CiteScore 2016: 1.03

SCImago Journal Rank (SJR) 2016: 0.395
Source Normalized Impact per Paper (SNIP) 2016: 0.873

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