Mixing Performance in a Distributed-Feed Plate-Type Reactor with Multinozzle Injection for Fine Chemical Production Scale

Abstract

The mixing performance of a distributed-feed plate-type reactor equipped with curved channel design and microstructured multinozzle injectors was investigated. Almost ideal plug flow behavior with 300 < Bo < 2000 for Re numbers between 338 and 3610 and total flow up to 240 L/h was ascribed to bend-induced vortices in combination with modulated flow velocities along the flow path. The micromixing performance of multinozzle jet injectors which consisted of round nozzles with 100 and 140 μm diameters in a circular pattern was studied using a decolorization reaction and the Villermaux-Dushman reaction in conjunction with the IEM model. Mixing times as obtained by the first method were generally higher than that obtained by the second method but both were in the range of milliseconds. The dependence of respective mixing times on the energy dissipation rate was found to scale with power-law exponents of −0.58 and −0.43, respectively, and suggested engulfment as the limiting mixing mechanism.

Investigations of mixing and heat transfer in a structured tube‐in‐tube millireactor by numerical, experimental and statistical methods

“…Benefit from multi‐jet to achieve adequate fluid mixing, not only in the tube‐in‐tube millireactor applications but also as a universal premixer 10,36,50 . In order to popularize the application of the multiholes jet feeding method, we performed structural optimization and selected the microhole diameter ( ), number of microholes ( ), annular space size ( ), the ratio of inner and outer tube diameter ( γ ), inner tube wall thickness ( δ ), and flow ratio ( R ) as variables.…”

“…One method utilizes flow visualization of a stream containing a dye or fluorescent dye, which is mixed with a second reactive stream. [10][11][12] The other is based on chemical reaction systems with mixing sensitive product distributions. [13][14][15][16] High heat transfer performances are essential to reaction safety and keep the temperature within a defined narrow range, which is crucial to product selectivity and reaction yield.…”

“…Two methods are usually used in the investigation of micromixing. One method utilizes flow visualization of a stream containing a dye or fluorescent dye, which is mixed with a second reactive stream 10–12 . The other is based on chemical reaction systems with mixing sensitive product distributions 13–16 …”

Micromixing Performance and Residence Time Distribution in a Miniaturized Magnetic Reactor: Experimental Investigation and Machine Learning Modeling

“…Glycerol/water solution is chosen as the working fluid, and R = 8. Details of the RTD theory and experiments are shown in refs and as well as the Supporting Information. Each experiment is repeated at least twice.…”

I&EC Research Special Issue on Fluidic Devices without Moving Parts

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