The yield of a consecutive-competitive reaction in a double jet semi-batch reactor: comparison between experiments and a multizone mixing model

✍ Scribed by René David; Hervé Muhr; Jacques Villermaux

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 462 KB
• Volume: 47
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(92)87139-h

✦ Synopsis

David and Wllermaux (1987,1989) and Muhr et al. (1990) have developed and applied a multizone mixing model (MZM) for semi-batch single jet mixing in stirred tanks. The aim of the present paper is to generalize the multizone model (MZM) to the case of a semi-batch stirred tank with two separate feedstreams, and to compare experimental data and model predictions. The model is applied to a consecutive-competitive reaction system (A+B--->R; R+B---->S) where the first reaction is instantaneous and the key reactant B is in defect . The model is based on both non perfect macromixing -depicted by the growth and movement of two mixing clouds issuing from by the feedstreams-and micromixing -depicted by engulfment processes within the clouds, passing across three zones of different turbulence intensity and followed by coalescence of the reaction clouds generated by the feedstreams. The model was able to predict satisfactorily the selectivity of the above reaction system without any parame ter fitting for various stirring speeds and two couples of feed points.