caa a22 4500 378927884 CHVBK 20180305123622.0 cr unu---uuuuu 161128e20041220xx s 000 0 eng 10.2202/1542-6580.1178 doi (NATIONALLICENCE)gruyter-10.2202/1542-6580.1178 3-D Modeling of Liquid Injection into Fluidized Beds [Elektronische Daten] [Joachim Werther, Stefan Bruhns] A three-dimensional model has been developed to describe the injection of liquid reactants into fluidized bed reactors operating in the bubbling fluidized bed regime. The model considers the processes of liquid transport and evaporation in the vicinity of the point of injection. The underlying idea, which is supported by previous measurements, is that the particles in the dense suspension phase are wetted by the liquid or gas-liquid spray. The wetted particles are subsequently dried while they are following the gross solids circulation within the bed. The model considers the flow structure of the bubbling fluidized bed and the solids mixing with the aid of a hybrid model which combines semi-empirical models for bubble growth by coalescence and for bubble splitting with a CFD approach for the continuous emulsion phase surrounding the bubbles. Submodels for heat and mass transfer are used to describe the temperature and concentration fields in the vicinity of the injection nozzle and the drying process of the wetted particles with the resulting release of the vaporized injection liquid. The model was validated separately against flow structure measurements, solids tracer measurements and experiments with the injection of water and ethanol, respectively, into beds of FCC particles. ©2011 Walter de Gruyter GmbH & Co. KG, Berlin/Boston Fluidization nationallicence fluidized bed nationallicence injection of liquids nationallicence jet nationallicence hybrid model nationallicence CFD nationallicence Werther Joachim Technical University of Hamburg-Harburg, werther@tu-harburg.de aut Bruhns Stefan E-mail: St.Bruhns@t-online.de aut International Journal of Chemical Reactor Engineering De Gruyter 2/1(2004-12-20) 2:1 2004 2 ijcre https://doi.org/10.2202/1542-6580.1178 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.2202/1542-6580.1178 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Werther Joachim Technical University of Hamburg-Harburg, werther@tu-harburg.de aut NATIONALLICENCE 700 1- Bruhns Stefan E-mail: St.Bruhns@t-online.de aut NATIONALLICENCE 773 0- International Journal of Chemical Reactor Engineering De Gruyter 2/1(2004-12-20) 2:1 2004 2 ijcre CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter