Details

Autor(en) / Beteiligte

• Richter, Oliver
• Menges, Markus
• Kraushaar-Czarnetzki, Bettina

Titel

Investigation of mixing in a rotor shape modified Taylor-vortex reactor by the means of a chemical test reaction

Ist Teil von

• Chemical engineering science, 2009-05, Vol.64 (10), p.2384-2391

Ort / Verlag

Kidlington: Elsevier Ltd

Erscheinungsjahr

2009

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The macro- and micromixing properties of a continuous flow Taylor-vortex reactor can be optimised by changing the conventional cylindrical rotor geometry into a novel ribbed one. A chemical test reaction, the micromixing-sensitive alkaline saponification of ethylacetate with separately fed reactants, was used to probe the mixing performance down to the molecular level. Experiments were performed in a continuous flow Taylor-vortex reactor equipped either with a conventional cylindrical rotor or with a novel ribbed rotor in a wide hydrodynamic range of 150 < Ta < 8000 and 0.8 < Re < 2.0 . Through increase in the reaction temperature and the feed concentrations, the relaxation times of this reaction were reduced from 680 to 19 s and compared to micromixing times by monitoring the reactor conversion. The results show that a TVR with conventional rotor achieves intense micromixing at high rotor speed, but behaves like a CSTR. In contrast, a device with ribbed rotor shows macromixing features close to those of a plug flow reactor (PFR) in a wide range of rotor speeds; however, segregation of the two feeds could only be dissipated at slow reaction rates, i.e. relaxation times larger than 64 s.