This file was created by the TYPO3 extension bib --- Timezone: CET Creation date: 2021-02-12 Creation time: 14-04-14 --- Number of references 17 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 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 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 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 Bueck A3

Sheffield (UK)

Proceedings of International Granulation Workshop ABück C.and Meyer, KNeugebauer SPalis EDiez AKienle SHeinrich ETsotsas 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