This file was created by the TYPO3 extension bib --- Timezone: CET Creation date: 2021-02-12 Creation time: 13-36-41 --- Number of references 8 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, &amp; 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 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 Palis2015 Procedia Engineering 2015 102 133 - 141 Abstract In this contribution control of continuous fluidized bed spray granulation processes with external product classification is studied. From a practical point of view control schemes being easy to implement and maintain using standard process control systems are preferable. Hence, the focus will be on standard <prt>PI</prt> control structures. In order to account for variations and uncertainties in the process an additional tuning procedure should be included. Here, an optimization based online controller adaptation scheme called iterative feedback tuning (ITF) will be investigated. New Paradigm of Particle Science and Technology Proceedings of The 7th World Congress on Particle Technology fluidized bed spray granulation, control, auto-tuning; A3 //www.sciencedirect.com/science/article/pii/S1877705815001162 1877-7058 http://dx.doi.org/10.1016/j.proeng.2015.01.115 StefanPalis ChristianDreyschultze ChristophNeugebauer AchimKienle 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 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