Experimental study of the effect of bubbles, drops and particles on the product distribution for a mixing sensitive, parallel-consecutive reaction system
✍ Scribed by D.W.F. Brilman; R. Antink; W.P.M. van Swaaij; G.F. Versteeg
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 409 KB
- Volume
- 54
- Category
- Article
- ISSN
- 0009-2509
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✦ Synopsis
For stirred multiphase reactors the e!ect of a dispersed (gas, liquid or solid) phase on the product distribution for a mixing sensitive reaction was tested. Turbulence modi"cation due to the presence of dispersed-phase particles has been reported frequently in literature, but the extent of the e!ect in a stirred multiphase reactor was not clear. In this work the well-known mixing sensitive diazocoupling reaction system was selected to investigate the in#uence of the changes in the turbulent kinetic energy spectrum on the product distribution. This reaction system was found to be suitable to study the in#uence of a dispersed (gas, liquid or solid) phase. The Engulfment model could describe the single-phase experiments and describes reasonably well the multiphase experiments when the e!ective dispersion properties are implemented. For the liquid}liquid dispersions e!ects of de-localization of the reaction zone were encountered, due to Naphthol extraction by the dispersed phase. The Engulfment model was extended to incorporate mass transfer and the "rst experimental and simulation results are promising. Additional, experimental and theoretical, research studying the combined e!ects of the mass transfer rate and the mixing rate for the liquid}liquid dispersions is highly desired.