Introduction of novel characteristic time quantities to describe chemical reactors

Weiland, Christian; Salli, Mustafa; Fitschen, Jürgen; Hoffmann, Marko; Schlüter, Michael

doi:10.1016/j.ceja.2023.100534

Cited by 1 publication

(1 citation statement)

References 13 publications

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“…The obtained results differ significantly from observations described in the literature, which can be primarily attributed to the different tracer addition method. In multi-stage impeller setups, a tracer added via the liquid surface is initially distributed in the region of the upper impeller, resulting in shorter local mixing times than around the lower impeller [41][42][43][44]. With the utilized 3D-printed injection baffle, this asymmetry can be avoided, allowing for a more uniform distribution across the liquid height as well as a more realistic representation of technical processes, where dosing usually takes place below the liquid filling line.…”

Section: Discussionmentioning

confidence: 99%

Investigation of the Mixing Time Distribution and Connected Flow Fields in Two-Stage Stirred Vessels

Matzke,

Ulbricht,

Schultz

2024

Processes

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In this study, laser-induced fluorescence is used to investigate the homogenization in stirred vessels equipped with single- and two-stage stirrers. The acquired local mixing times across the reactor cross-section are plotted as mixing time distribution (MTD) and then compared with the previously measured flow fields of the identical systems. With the help of a novel evaluation method, the mixing times are characterized with a normal distribution fit. With mean value and standard deviation as determined parameters, the mixing results of different installation heights and stirrer combinations are quantitatively evaluated and lead to clear recommendations for installations that enable efficient mixing.

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Section: Discussionmentioning

confidence: 99%