This file was created by the TYPO3 extension bib --- Timezone: CET Creation date: 2021-02-12 Creation time: 13-43-00 --- Number of references 17 article Meyer2017 Particuology 2017 A3 10.1016/j.partic.2016.09.007 KMeyer ABück E.Tsotsas article LondershausenSUHTT2016 Filtech Conference, Oct. 11-13, Cologne. 2016 T.Londershausen E.Schmidt University of Wupperatal M.Hennig U.Teipel Technical University of Nuremberg article Bueck2016 Powder Technology 2016 300 37 - 45 Abstract Several studies—theoretical and experimental—show that continuous fluidised bed layering granulation with external classification can show instability in the form of self-sustained oscillations. Recent results show that the process stability does not only depend on product-related process parameters but also on the formation of functional zones in the fluidised bed chamber, especially the formation of a spray and drying zone. In this work a systematic evaluation of zone formation in different apparatus designs (e.g., top- and bottom-spray in cylindrical apparatuses) and its influence on process stability is performed, resulting in a stability regime map for the different apparatus designs and key operation parameters. 7th International Granulation Workshop 2015: Granulation across the length scales Layering, Fluidised bed, Process stability, External classification, Bifurcation analysis A3 //www.sciencedirect.com/science/article/pii/S0032591016301127 0032-5910 http://dx.doi.org/10.1016/j.powtec.2016.03.019 A.Bück C.Neugebauer K.Meyer S.Palis E.Diez A.Kienle S.Heinrich E.Tsotsas article Neugebauer2016 Particuology 2016 - Abstract A dynamic two-zone model is proposed to address the formation of granulation and drying zones in fluidized bed layering granulation processes with internal product classification. The model assumes a constant volume for the granulation zone, but a variable overall volume for the fluidized bed to account for classified product removal. The model is used to study the effect of various process parameters on dynamics and process stability. Stability is shown to depend on the separation diameter of product removal and the flow rate of the injected liquid. A lower and upper range of separation diameters with stable process behavior are found. In an intermediate range instability in the form of self-sustained oscillations is observed. The lower stability boundary is in qualitative agreement with recent experimental observations (Schmidt, Bück, & Tsotsas, 2015); the upper boundary was reported in a theoretical paper by Vreman, Van Lare, and Hounslow (2009) based on a single zone model. Layering granulation, Zone formation, Internal product classification, Population balance modeling, Stability analysis A3 //www.sciencedirect.com/science/article/pii/S1674200116300967 1674-2001 http://dx.doi.org/10.1016/j.partic.2016.07.001 C.Neugebauer S.Palis A.Bück E.Tsotsas S.Heinrich A.Kienle article Temmel2016 Crystal Growth & Design 2016 in press, DOI: 10.1021/acs.cgd.6b00787 10.1021/acs.cgd.6b00787 E.Temmel H.Eisenschmidt K.Sundmacher H.Lorenz A.Seidel-Morgenstern article Dreyschultze2015 Particuology 2015 23 1 - 7 Abstract Continuous fluidized bed layering granulation with external product classification and a sieve-mill cycle can show instability in the form of self-sustained nonlinear oscillations of the particle size distribution. In the present study, the stability and bifurcation analysis of this process is presented. The underlying process models explicitly account for compartmentalization of the fluidized bed into a granulation and a drying zone, which is an important feature of many technical processes. Implications for plant operations are discussed with the help of stability diagrams as a function of zone size, residence time within different zones, the addition of external seeds and particular properties of the sieve-mill cycle. Fluidized bed, Granulation, Population balance, Stability, Bifurcation A3 //www.sciencedirect.com/science/article/pii/S1674200115000863 1674-2001 http://dx.doi.org/10.1016/j.partic.2015.02.004 C.Dreyschultze C.Neugebauer S.Palis A.Bück E.Tsotsas S.Heinrich A.Kienle article Meyer2015 Procedia Engineering 2015 102 1456 - 1465 Abstract In this work a generic multi-compartment, multi-zone population balance model (PBM) is developed which allows predicting the process dynamics of particle formation in a horizontal fluidized bed. It focuses on the particle size distribution (PSD) which is an important quality parameter in solids process industry. It is influenced by different factors, e.g. apparatus design (weir and nozzle assembly) and process conditions (mass flow rate), respectively. In this study the apparatus design by an over and under flow weir configuration, used separately or in combination, is investigated to obtain the product properties at the outlet of the apparatus. Simulation results show how characteristic product data depend on the process conditions and apparatus design. The obtained trends can then be used for an inverse apparatus design of horizontal fluidized beds to obtain particles with desired properties. New Paradigm of Particle Science and Technology Proceedings of The 7th World Congress on Particle Technology horizontal fluidized bed, spray granulation, population balance modeling, particle size distribution. A3 //www.sciencedirect.com/science/article/pii/S1877705815002982 1877-7058 http://dx.doi.org/10.1016/j.proeng.2015.01.279 KatjaMeyer AndreasBück EvangelosTsotsas article Hagemeier2014 Chem. Eng. Technol. 2014 37 5 879–887 The separation efficiency of a pilot-scale zigzag apparatus is investigated numericallyusing computational fluid dynamics simulations and discrete particle modelingin a coupled manner. The effects of various process variables, like particlesize and air flow velocity, and of turbulence models were analyzed. The resultingchanges concerning the process performance expressed by separation functionand sharpness are discussed. Moreover, the residence time distribution was foundto differ for fine and coarse particle discharges. Small particles are easily carriedaway by the fluid and respond immediately to almost every change in flow velocity.Therefore, they are affected by vortices, which increase their residence timescompared to bigger particles. Computational fluid dynamics, Multi-stage separation, Turbulent air flow, Zigzag apparatus 10.1002/ceat.201300670 ThomasHagemeier HannesGlöckner ChristophRoloff DominiqueThévenin JürgenTomas article Borchert2014 Crystal Growth & Design 2014 14 3 952-971 http://dx.doi.org/10.1021/cg401098x 10.1021/cg401098x C.Borchert E.Temmel H.Eisenschmidt H.Lorenz A.Seidel-Morgenstern K.Sundmacher inproceedings Meyer2016a 2016 A3 Gifu (JP) Proceedings of International Drying Symposium (IDS 2016) KMeyer ABück ETsotsas inproceedings Neugebauer2016a 2016 38 1275-1280 A3 Computer Aided Chemical Engineering CNeugebauer SPalis ABück EDiez SHeinrich ETsotsas AKienle inproceedings Neugebauer2016b 2016 A3 Proceedings of the International Congress on Particle Technology (PARTEC), April 19-21, Nürnberg CNeugebauer SPalis ABück SHeinrich ETsotsas AKienle inproceedings Meyer2014 2014 A3 J. Andrieu und P. Perré Proc. 19th International Drying Symposium (IDS 2014) KMeyer ABück ETsotsas inproceedings Bueck A3

Sheffield (UK)

Proceedings of International Granulation Workshop ABück C.and Meyer, KNeugebauer SPalis EDiez AKienle SHeinrich ETsotsas misc Londershausen2016a 2016 B1 Filtech Conference, Oct. 11-13, 2016, Cologne T.Londershausen E.Schmidt M.Hennig U.Teipel misc Elskamp2014a 2014 For the design of screening processes detailed particle-based simulation approaches such as the discrete element method and various simpler phenomenological models are available. Among the latter, different probabilistic and kinetic models have been proposed and further extended. So far a benchmarking of the various available screening process models has not been performed. Therefore, a selection of screening process models is reviewed and benchmarked numerically by using detailed discrete element simulations of batch screening processes involving spherical and complex shaped particles in this investigation. Different particle characteristics such as size, shape, as well as overall mass are examined. In addition operational parameters including vibration frequency, stroke angle and amplitude are considered. The comparison is performed based on the stratification ability and parameters like the screening efficiency which are calculated over time. This comparative study will form the basis for the extension ofphenomenological models to represent dynamic processes during batch screening. Screening; Discrete element method; Complex shaped particles; Process models 7th World Congress on Particle Technology Beijing 7th World Congress on Particle Technology 2014 FrederikElskamp HaraldKruggel-Emden HendrikKomossa VictorScherer ManuelHennig UlrichTeipel misc Hennig2014 2014 Das dynamische Verhalten des Trenngrades von Schwingsieben bei Änderung des Massenstroms und der Partikelgrößenverteilung des Aufgabeguts wird untersucht. Auf der Basis vorhandener Modelle für den statischen Betrieb soll das dynamische Verhalten anhand der zeitabhängigen Trennfunktion analysiert werden. Hierfür werden im Rahmen zweier DFG-Teilprojekte des SPP 1679 „Dynamische Simulation vernetzter Feststoffprozesse“ zwei sich ergänzende Ansätze verfolgt. An der Technischen Hochschule Nürnberg wird die Partikelbewegung auf dem Siebboden untersucht. Hierzu wird den Einzelpartikeln mithilfe einer Hochgeschwindigkeitskamera eine Bahnkurve zugeordnet und der Einfluss der Eingangsparameter auf die Trennfunktion analysiert. Für die Parameterstudie wird ein Kreisschwingsieb eingesetzt. Der dynamische Einfluss bei sprungartiger und linearer Änderung des Massenstroms und der Dispersitätseigenschaften im Aufgabegut wird analysiert. In Kombination wird ein kinetisches oder wahrscheinlichkeitstheoretisches Modell für den dynamischen Betrieb ermittelt. An der Ruhr-Universität Bochum wird parallel die Modellierung der Siebklassierung mittels DEM durchgeführt. Wichtig ist die Parametervalidierungmittels realer Partikelbewegung und Trennfunktionen. Mithilfe von DEM-Simulationen sind Parameterstudien für Materialien mit unterschiedlichen Dispersitätseigenschaften möglich. DECHEMA-Jahrestagung Aachen, Deutschland DECHEMA-Jahrestagung 2014 10.1002/cite.201450646 ManuelHennig FrederikElskamp HaraldKruggel-Emden UlrichTeipel