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Investigation of the local specific energy dissipation rates in a jet‐zone loop reactor for halogenation of ketones
Author(s) -
Wiedemann Mathias,
Schlüter Michael,
Räbiger Norbert
Publication year - 2010
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.20284
Subject(s) - particle image velocimetry , jet (fluid) , dissipation , mechanics , loop (graph theory) , flow (mathematics) , kinetic energy , physics , chemistry , thermodynamics , materials science , classical mechanics , turbulence , mathematics , combinatorics
Within the framework of process intensification there is a growing demand for novel reactor technologies. For the improvement of halogenation of ketones a jet‐zone loop reactor (JZR) is used, which leads to an enormous increase in yield and selectivity compared to stirred vessels (Kutschera et al., 2008). This JZR is a special jet loop reactor with high specific mass transfer performance and good macromixing behaviour. It is obvious that there is direct relation between the reaction and the hydrodynamics in the reactor. Despite several aspects of hydrodynamics in jet loop reactors have been investigated, the essential flow characteristics behind a two‐component jet are not sufficiently understood. In these investigations, the flow field in the jet zone of the JZR was analysed by 2D particle image velocimetry (PIV) and the kinetic energy dissipation rate ε was determined from the spatial gradients of the fluctuating velocity.