Publisher DOI: 10.1016/j.ces.2022.118161
Title: Mixing evolution behavior of raw and gasified biomass pellets in a fluidized bed reactor
Language: English
Authors: Wang, Shen 
Song, Tao 
Jarolin, Kolja  
Dymala, Timo  
Dosta, Maksym 
Heinrich, Stefan 
Shen, Laihong 
Keywords: Binary mixing evolution; Biomass pellet; Convolutional neural networks; Fluidized bed; Gasification
Issue Date: 31-Dec-2022
Source: Chemical Engineering Science 264: 118161 (2022-12-31)
Abstract (english): 
Due to a large particle size and a small specific surface, a homogeneous mixing of biomass pellets with bed materials during gasification plays a critical role in the devolatilization and carbon conversion. In this work, the mixing evolution behavior of biomass pellets at different gasification stages is investigated for the first time. Two bubbling fluidized beds are established to perform the preparation of biomass samples undergoing different gasification times and visualized mixing experiments, respectively. An image processing technique is introduced for the determination of the real-time distribution of biomass pellets. The vertical and lateral migration paths of biomass pellets at different gasification stages are revealed. The improvement of binary mixing by adjusting the operating conditions as well as the adaptability to different biomass loadings are discussed. A convolutional neural network is developed to validate the influence of fluidization velocity on the resulting flow and classify the fluidization behavior.
ISSN: 0009-2509
Journal: Chemical engineering science 
Institute: Feststoffverfahrenstechnik und Partikeltechnologie V-3 
Mehrskalensimulation von Feststoffsystemen V-EXK1 (H) 
Document Type: Article
Project: Mulitiskalen Simulation zur Analyse und Optimierung der Chemical-Looping Vergasung 
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