A simple model for predicting solid concentration distribution in binary‐solid liquid fluidized beds. Issue 2 (27th July 2016)

• Record Type: Journal Article
• Authors: Peng, Zhengbiao; Moghtaderi, Behdad; Doroodchi, Elham
• Is Part Of: AIChE journal. Volume 63:Issue 2(2017)
• Page Start: 469
• Page End: 484
• Publication Date: 2016-07-27
• Subjects: liquid fluidized bed -- segregation -- dispersion -- logistic function -- solid concentration distribution -- transition zone length; Chemical engineering -- Periodicals; Génie chimique -- Périodiques; 660.28
• DOI: 10.1002/aic.15420
• Languages: English
• ISSNs: 0001-1541

Abstract

Abstract : A simple mathematical model for predicting the solid concentration profile in binary‐solid liquid fluidized beds is presented. The main assumption is that the solid concentration distribution follows the logistic function, which is supported by the literature. Various equations have been derived to solve key system quantities (e.g., bed expansion height, length and position of the transition zone). In contrast to previous models that often involve adjustable parameters and strongly rely on the availability of experimental data, the present model only requires inputs of fluid and particle properties, operating conditions, and correlations for dispersion and slip velocity. The results showed that the model is applicable to different binary‐solid systems that have size and/or density differences. The model's capability of predicting the layer inversion phenomenon has also been demonstrated. The model is simple but proves capable of accurately predicting key information for the design, operation and scale up of liquid fluidized beds. © 2016 American Institute of Chemical Engineers AIChE J, 63: 469–484, 2017