This file was created by the TYPO3 extension bib --- Timezone: CET Creation date: 2021-02-12 Creation time: 13-06-00 --- Number of references 29 article Skorych2019 Advanced Powder Technology 2019 accepted V.Skorych M.Dosta E.-U.Hartge S.Heinrich R.Ahrens S.Le Borne article HausHHW2018 International Journal of Greenhouse Gas Control 2018 72 26-37 J.Haus E.-U.Hartge S.Heinrich J.Werther 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 Haus2016 Powder Technology 2016 Abstract A novel flowsheet simulation environment is applied to simulate a system of interconnected fluidized bed reactors as they are used for the process of chemical looping combustion of solid fuels. Dynamic models of the main process equipment are used in order to capture dynamic behavior of hydrodynamics inside an actual system, which delivers the experimental validation data. The process itself is carried out in a pair of strongly coupled fluidized bed reactors. Furthermore, a cyclone is used for gas-solid separation and two loop seal siphons prevent gas leakages from one reactor to another. The experimental plant operated at Hamburg University of Technology, which is modeled here, comprises a circulating fluidized bed air reactor and a two-stage bubbling bed fuel reactor. Operation of the plant is carried out at ambient condition and so are the simulations. All the mentioned process units are connected into a flowsheet via material streams and the whole process is simulated for 750 s of runtime. Within this time, the fluidization velocity of the fuel and the air reactor are changed to mimic effects, which occur during actual operation. The simulation was closely accompanied by experiments at the experimental facility and the results of simulation and experiments were compared. The bed mass, solid circulation and pressure profiles were simulated with good agreement to experimental findings. Dynamic effects were captured by the simulations and the system’s response to varying the fluidization speed, that is the change of bed masses, was predicted correctly. Time scales, in which these changes occur, were in the same range for experiments and simulations. A2 http://www.sciencedirect.com/science/article/pii/S0032591016308890 Elsevier 00325910 10.1016/j.powtec.2016.12.022 JohannesHaus Ernst-UlrichHartge StefanHeinrich JoachimWerther article Haus2016a Energy Technology 2016 4 10 1263--1273 chemical looping;coal;copper oxide;solid fuel;two-stage reactor A2 http://dx.doi.org/10.1002/ente.201600102 Wiley Online Library 2194-4296 10.1002/ente.201600102 JohannesHaus KaiLyu Ernst-UlrichHartge StefanHeinrich JoachimWerther article Haderlein2015 Chemical Engineering Journal 2015 260 706-715 M.Haderlein D.Segets M.Gröschel L.Pflug G.Leugering W.Peukert 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 Spettl2015 Advanced Powder Technology 2015 26 3 1021--1030 http://dx.doi.org/10.1016/j.apt.2015.04.011 10.1016/j.apt.2015.04.011 A.Spettl M.Dosta S.Antonyuk S.Heinrich V.Schmidt article Dosta2014 Chemie Ingenieur Technik 2014 86 7 1073--1079 Wiley Online Library MaksymDosta SergiyAntonyuk Ernst-UlrichHartge StefanHeinrich 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 inproceedings LindmuellerHHHW2018 2018 5th International Conference on Chemical Looping L.Lindmueller J.Haus E.-U.Hartge S.Heinrich J.Werther inproceedings Haus2016b 2016 A2 Chaouki, Jamal and Berruti, Franco and Bi, Xiatao and Cocco, Ray Fluidization XV JohannesHaus Ernst-UlrichHartge StefanHeinrich JoachimWerther 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 Hartge2015 2015 A2 Proc. of the 22nd Int. Conf. on Fluidized Bed Conversion Turku, Finland 22nd Int. Conf. on Fluidized Bed Conversion Ernst-UlrichHartge JohannesHaus StefanHeinrich JoachimWerther inproceedings Komossa2014 2014 Proceedings of the 11th Int. Conf. on Heat Transfer, Fluid Mechanics and Thermodynamics South Africa 11th Int. Conf. on Heat Transfer, Fluid Mechanics and Thermodynamics July 20-23, 2015 submitted H.Komossa S.Wirtz V.Scherer A.I.Nafsun F.Herz E.Specht 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 Haus2016c 2016 A2 Jahrestreffen der ProcessNet-Fachgruppen Agglomerations- und Schüttguttechnik, Computational Fluid Dynamics und Mehrphasenströmungen Bingen Jahrestreffen der ProcessNet-Fachgruppen Agglomerations- und Schüttguttechnik, Computational Fluid Dynamics und Mehrphasenströmungen 29. Februar– 02. März 2016 JohannesHaus Ernst-UlrichHartge JoachimWerther StefanHeinrich misc Hartge2015a 2015 A2 ProcessNet. Jahrestreffen der Fachgruppen Computational Fluid Dynamics und Mehrphasenströmungen Lüneburg Jahrestreffen der Fachgruppen Computational Fluid Dynamics und Mehrphasenströmungen 19. – 20. März 2015 Ernst-UlrichHartge JohannesHaus StefanHeinrich JoachimWerther misc Komossa2014a 2014 DGMK-Fachbereichstagung: Konversion von Biomassen Rotenburg, Germany DGMK-Fachbereichstagung: Konversion von Biomassen Mai 12-14, 2014 H.Komossa D.Höhner S.Wirtz V,Scherer E.Specht F.Herz 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 Segets2014 2014 WCPT, Beijing, China Peking (China) WCPT D.Segets M.Haderlein M.Gröschel L-Pflug G.Leugering W.Peukert misc Haderlein2014 2014 NaNaX, Bad Hofgastein (Österreich) Bad Hofgastein (Österreich) NaNaX M.Haderlein M.Gröschel D.Segets G.Leugering W.Peukert 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 misc Haderlein2013 PBM 2013 PBM, Bangalore (India) Bangalore (Indien) PBM M.Haderlein M.Gröschel G.Leugering W.Peukert misc Haderlein2013a 2013 Dechema Jahrestreffen Mikroverfahrenstechnik, Frankfurt a. M. Frankfurt a. M. Dechema Jahrestreffen Mikroverfahrenstechnik M.Haderlein D.Segets W.Peukert