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Publisher DOI: 10.1007/s40571-022-00467-9
Title: Modeling the devolatilization and fragmentation of biomass pellets with the bonded particle method for fluidized bed applications
Language: English
Authors: Jarolin, Kolja  
Dymala, Timo  
Heinrich, Stefan 
Dosta, Maksym 
Keywords: Bonded particle method; Devolatilisation; Discrete element method; Fragmentation; Gasification; Microscale model; Wood pellets
Issue Date: 14-Mar-2022
Publisher: Springer
Source: Computational Particle Mechanics 9 (6): 1319-1335 (2022)
Abstract (english): 
By extending the bonded particle method, the major structural changes during the devolatilization of a wood pellet in a fluidized bed and the resulting mechanical behavior have been successfully reproduced. A comparison with experiments from the literature showed that the implemented particle-based pyrolysis model enables predicting the entire pellet’s kinetics with a high agreement. The developed shrinkage model for the particles and bonds further allowed to emulate the reported formation of a large-scale pore network inside the pellet. The simulation of a radial compression test with the predicted structure showed good agreement with experimental data and could confirm the importance of the pores for the mechanical behavior. The results demonstrated that the large pores cause the fragmentation of agglomerates already at low mechanical loads which could promote attrition. In general, the results have shown that the developed extension of the bonded particle method allows studying and predicting the behavior of a single pellet during conversion inside a fluidized bed gasification reactor in more detail.
DOI: 10.15480/882.4741
ISSN: 2196-4386
Journal: Computational particle mechanics 
Institute: Feststoffverfahrenstechnik und Partikeltechnologie V-3 
Document Type: Article
Project: Projekt DEAL 
License: CC BY 4.0 (Attribution) CC BY 4.0 (Attribution)
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