Gas-liquid microreactors

H., WiLLE, C., Guber, a.. Direct fluorina-tion of tduene using elemental fluorine in gas/liquid microreactors, J. Fluorine Chem. 105, 1 (2000) 117-128. 

Hessel, V., Ehreeld, W., Golbig, K., Haveekamp, V., Lowe, H., Storz, M., WiLLE, C., Gubee, a., Jahnisch, K., Baerns, M., Gas/liquid microreactors for direct Jluorination of aromatic compounds using elemental fluorine, in Ehreeld, W. (Ed.), Microreaction Technology ... 

Hessel, V, Ehreeld, W., Heeweck, T., Haveekamp, V, Lowe, H., Schiewe, J., WiLLE, G., Keen, T, Lutz, N., Gas/liquid microreactors hydrodynamics and mass transfer, in Proceedings of the 4th International Conference on Microreaction Technology, IMRET 4, 5-9 March 2000, pp. 174-186, AIGliE Topical Conf. Proc., Atlanta, GA (2000). 

Characterization of a gas/liquid microreactor, the micro bubble column Determination of specific interfacial area, in Matlosz, M., Ehreeld, W., Baselt,... 

Chambers RD, Fox MA, Sandford G (2005) Elemental fluorine - Part 18. Selective Direct Fluorination of 1,3-Ketoesters and 1,3-Diketones using Gas/ Liquid Microreactor Technology. Lab Chip 5 1132-1139 Cheng RP, Gellman SH, DeGrado WF (2001) Beta-Peptides From Structure to Function. Chem Rev 101 3219-3232... 

Jahnisch K, Baerns M, Hessel V, Ehrfeld W, Haverkamp V, Lowe H, Wille C, Guber A (2000) Direct Fluorination of Toluene Using Elemental Fluorine in Gas/Liquid Microreactors. J Fluor Chem 105 117-128 Jahnisch K, Hessel V, Lowe H, Baerns M (2004) Chemistry in Microstructured Reactors. Angew Chem Int Ed 43 406 -46 Jensen KF (2001) Microreaction Engineering - is Small Better Chem Eng Sci 56 293-303... 

De Mas N, Gunther A, Kraus T, Schmidt MA, Jensen KF (2005) Scaled-out multilayer gas-liquid microreactor with integrated velocimetry sensors. Ind Eng Chem Res 44 8997-9013... 

Haverkamp, V., Emig, G., Hessel, V., Liauw, M.A. and Lowe, H. (2001) Characterization of a gas/liquid microreactor, the micro bubble column determination of specific interfadal area, in Microreaction Technology- IMRET 5 Proceedings of the 5th International Conference on Microreaction Technology (eds M. Matlosz, W. Ehrfeld and J.P. Baselt), Springer-Verlag, Berlin, pp. 202-214. 

Gas-liquid microreactors hydrodynamics and mass transfer, in Proceedings of the 4th International Conference on Microreaction Technology, IMRET 4, Atlanta, USA, pp. 174-186. 

Falling-film gas/liquid microreactors, as shown in Figure 8.2, are also useful for direct fluorination of organic compounds, such as toluene with F2 (Scheme 8.2). In this reactor a liquid reactant falls down through the channels and the gas also falls down on to the surface of the liquid flow to attain a high gas/liquid surface-to-volume ratio to accelerate the gas/liquid reaction. 

V. Hessel, W. Ehrfeld, T. Herweck, V. Haverkamp, H. Lowe, J. Schiewe, C. Wille, T. Kern, N. Lutz, Gas/Liquid Microreactors Hydrodynamics and Mass Transfer, in W. Ehrfeld, U. Eul, R.S. Wegeng (Eds.), Proceedings of the 4th International Conference on Microreaction Technology (IMRET 4), AIChE, Atlanta, 2000, p. 174. 

First, the overall mass transfer coefRcient k a of the microreactor was estimated to be 3-8 s [43]. For intensified gas liquid contactors, kj a can reach 3 s while bubble columns and agitated tanks do not exceed 0.2 s Reducing the flow rate and, accordingly, the liquid film thickness is a means of further increasing kj a, which is limited, however, by liquid dry-out at very thin films. Despite such large mass transfer coefficients, gas-liquid microreactors such as the falling film device may still operate between mass transfer and kinetic control regimes, as fundamental simulation studies on the carbon dioxide absorption have demonstrated [44]. Distinct concentration profiles in the liquid, and even gas, phase are predicted. 

Jahnisch, K., et al.. Direct flnorination of tolnene using elemental fluorine in gas/liquid microreactors. Journal of Fluorine Chemistry, 2000, 105 117-128. 

Jahnisch K, Baems M, Hessel V et al (2000) Direct fluorination of toluene using elemental fluorine in gas/liquid microreactors. J Fluor Chem 105 117-123... 

Waelchli, S. Rudolf von Rohr, P. 2006. Two-phase flow characteristics in gas—liquid microreactors. International journal of multiphase flow, 32, 791-806. 

Waelchli S and Rohr PRV (2006), Two-phase flow characteristics in gas-liquid microreactors , Int J Multiphas Flow, 32,791-806. 

R.D. Chambers, M.A. Fox, G. Sandford, Elemental fluorine — Part 18. Selective direct fluorination of 1,3-ketoesters and 1,3-diketones using gas/liquid microreactor technology. Lab on a Chip, 2005, 5, 1132-1139. 

S. Waelchli, P.R. von Rohr, Two-phase flow characteristics for gas-liquid microreactors, Int. J. Multiphase Flow, 2006, 32, 791-806. 

I, 3-diketones using gas/liquid microreactor technology, Lab Chip 2005, 5, 1132-1139. 

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