% % This file was created by the TYPO3 extension % bib % --- Timezone: CET % Creation date: 2021-02-12 % Creation time: 14-16-53 % --- Number of references % 8 % @Article { Bueck2016, title = {Influence of operation parameters on process stability in continuous fluidised bed layering with external product classification}, journal = {Powder Technology}, year = {2016}, volume = {300}, pages = {37 - 45}, abstract = {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.}, note = {7th International Granulation Workshop 2015: Granulation across the length scales}, keywords = {Layering, Fluidised bed, Process stability, External classification, Bifurcation analysis}, tags = {A3}, web_url = {//www.sciencedirect.com/science/article/pii/S0032591016301127}, ISSN = {0032-5910}, DOI = {http://dx.doi.org/10.1016/j.powtec.2016.03.019}, author = {Bück, A. and Neugebauer, C. and Meyer, K. and Palis, S. and Diez, E. and Kienle, A. and Heinrich, S. and Tsotsas, E.} } @Article { Neugebauer2016, title = {A dynamic two-zone model of continuous fluidized bed layering granulation with internal product classification}, journal = {Particuology}, year = {2016}, pages = {-}, abstract = {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.}, keywords = {Layering granulation, Zone formation, Internal product classification, Population balance modeling, Stability analysis}, tags = {A3}, web_url = {//www.sciencedirect.com/science/article/pii/S1674200116300967}, ISSN = {1674-2001}, DOI = {http://dx.doi.org/10.1016/j.partic.2016.07.001}, author = {Neugebauer, C. and Palis, S. and Bück, A. and Tsotsas, E. and Heinrich, S. and Kienle, A.} } @Article { Dreyschultze2015, title = {Influence of zone formation on stability of continuous fluidized bed layering granulation with external product classification}, journal = {Particuology}, year = {2015}, volume = {23}, pages = {1 - 7}, abstract = {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.}, keywords = {Fluidized bed, Granulation, Population balance, Stability, Bifurcation}, tags = {A3}, web_url = {//www.sciencedirect.com/science/article/pii/S1674200115000863}, ISSN = {1674-2001}, DOI = {http://dx.doi.org/10.1016/j.partic.2015.02.004}, author = {Dreyschultze, C. and Neugebauer, C. and Palis, S. and Bück, A. and Tsotsas, E. and Heinrich, S. and Kienle, A.} } @Article { Palis2015, title = {Auto-tuning Control Systems for Improved Operation of Continuous Fluidized Bed Spray Granulation Processes with External Product Classification}, journal = {Procedia Engineering}, year = {2015}, volume = {102}, pages = {133 - 141}, abstract = {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 {PI} 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.}, note = {New Paradigm of Particle Science and Technology Proceedings of The 7th World Congress on Particle Technology}, keywords = {fluidized bed spray granulation, control, auto-tuning;}, tags = {A3}, web_url = {//www.sciencedirect.com/science/article/pii/S1877705815001162}, ISSN = {1877-7058}, DOI = {http://dx.doi.org/10.1016/j.proeng.2015.01.115}, author = {Palis, Stefan and Dreyschultze, Christian and Neugebauer, Christoph and Kienle, Achim} } @Inproceedings { Neugebauer2016a, title = {Influence of mill characteristics on stability of continuous layering granulation with external product classification}, year = {2016}, number = {38}, pages = {1275-1280}, tags = {A3}, booktitle = {Computer Aided Chemical Engineering}, author = {Neugebauer, C and Palis, S and Bück, A and Diez, E and Heinrich, S and Tsotsas, E and Kienle, A} } @Inproceedings { Neugebauer2016b, title = {Control of multi-chamber continuous fluidized bed spray granulation}, year = {2016}, tags = {A3}, booktitle = {Proceedings of the International Congress on Particle Technology (PARTEC), April 19-21, Nürnberg}, author = {Neugebauer, C and Palis, S and Bück, A and Heinrich, S and Tsotsas, E and Kienle, A} } @Inproceedings { Bueck, title = {Influence of operation parameters on process stability in continuous fluidized bed layering with external product classification}, tags = {A3}, address = {Sheffield (UK)}, booktitle = {Proceedings of International Granulation Workshop}, author = {Bück, A and Neugebauer, C.and Meyer, K and Palis, S and Diez, E and Kienle, A and Heinrich, S and Tsotsas, E} } @Inproceedings { Palis, title = {A Methodology for Experimental Determination of Stability Boundaries with Application to Fluidized Bed Spray Granulation}, number = {33}, pages = {625—630}, tags = {A3}, editor = {J.J. Klemes and P.S. Varbanov and P. Yen Liew}, booktitle = {Computer Aided Chemical Engineering, Bd. 33,}, author = {Palis, S and Dreyschultze, C and Kienle, A} }