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Modelling of Mechanical Behavior of Biopolymer Alginate Aerogels Using the Bonded-Particle Model
Open AccessArticle

Investigation of Hydrodynamic Behavior of Alginate Aerogel Particles in a Laboratory Scale Wurster Fluidized Bed

Department of Chemical and Biological Engineering, Koç University, Sarıyer, Istanbul 34450, Turkey
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Author to whom correspondence should be addressed.
Academic Editors: Eng. Carlos A. García-González and Luísa Durães
Molecules 2019, 24(16), 2915; https://doi.org/10.3390/molecules24162915
Received: 27 June 2019 / Revised: 6 August 2019 / Accepted: 8 August 2019 / Published: 11 August 2019
(This article belongs to the Special Issue Engineering of Aerogels and Their Applications)
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Abstract

The effects of design and operating parameters on the superficial velocity at the onset of circulatory motion and the residence time of alginate aerogel particles in a laboratory scale Wurster fluidized bed were investigated. Several sets of experiments were conducted by varying Wurster tube diameter, Wurster tube length, batch volume and partition gap height. The superficial velocities for Wurster tube with 10 cm diameter were lower than the tube with 8 cm diameter. Superficial velocities increased with increasing batch volume and partition gap height. Moreover, increasing batch volume and partition gap height led to a decrease in the particle residence time in the Wurster tube. The results showed that there is an upper limit for each parameter in order to obtain a circulatory motion of the particles. It was found that the partition gap height should be 2 cm for proper particle circulation. Maximum batch volume for the tube with 10 cm diameter was found as 500 mL whereas maximum batch volume was 250 mL for the tube with 8 cm diameter. The fluidization behavior of the aerogel particles investigated in this study could be described by the general fluidization diagrams in the literature. View Full-Text
Keywords: alginate; aerogel; particles; fluidization; Wurster fluidized bed; hydrodynamics alginate; aerogel; particles; fluidization; Wurster fluidized bed; hydrodynamics
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Akgün, I.S.; Erkey, C. Investigation of Hydrodynamic Behavior of Alginate Aerogel Particles in a Laboratory Scale Wurster Fluidized Bed. Molecules 2019, 24, 2915.

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