Microreactor capillary slug-flow

Kashid, M. N., Gerlach, 1., Goetz, S., Franzke, J., Acker, J., Platte, F., et al. (2005). Internal circulation within the liquid slugs of a liquid-liquid slug-flow capillary microreactor. Industrial... 

Ghaini, A., Kashid, M., Agar, D. (2010). Effective interfacial area for mass transfer in the liquid-liquid slug flow capillary microreactors. Chemical Engineering and Processing Process Intensification, 49, 358—366. 

Kashid, M. N., Agar, D. W. (2007). Hydrodynamics of liquid-liquid slug flow capillary microreactor flow regimes, slug size and pressure drop. Chemical Engineering Journal, 131, 1-13. 

Kashid, M.N. (2007) Experimental and Modelling Studies on Liquid-Liquid Slug Flow Capillary Microreactors, University of Dortmund, Dortmund. 

Power input, a decisive parameter for benchmarking technical reactors, has been investigated using the experimental pressure drop and compared with conventional contactor as shown in Table 15.5. The comparison reveals that the liquid-liquid slug flow microreactor requires much less power than the alternatives to provide large interfacial area - as high as a = 5000 m m in a 0.5 mm capillary microreactor, which is way above the values in a mechanically agitated reactor (a 500 m m ). 

M. N. Kashid, Experimental and modelling studies on liquid-liquid slug flow capillary microreactors, PhD Thesis, Technical University of Dortmimd, 2007. 

Sulfonations are a further important type of electrophilic substitution reaction. However, only very few examples can be found in the literature describing the use of microstructured reactors for the strongly exothermic liquid-phase sulfonation of aromatics (sulfonation of toluene wdth gaseous SO3 was described by Jaehnisch et al. [34]). Burns and Ramshaw [25, 35] claimed that their concept of performing liquid/liquid nitration reactions in a slug-flow capillary-microreactor can be also... 

Figure 0.4 Observed flow regimes in the capillary microreactor (Y-junction ID = 1 mm, capillary ID = 1 mm), (a) Slug flow, (b) drop flow, and (c) deformed interface flow. (Adapted from Kashid, M.N. and Agar, D.W., Chem. Eng. J. 131, 1, 2007.)...

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