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Mass transfer and concentration boundary layer in a particulate fluidized bed

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2016
Authors
Jaćimovski, Darko
Garić Grulović, Radmila
Vucetic, Nemanja
Pjanovic, Rada
Bošković-Vragolović, Nevenka
Article (Published version)
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Abstract
The aim of this study was to analyze the concentration boundary layer for a comprehensive description of the mass transfer in systems with fluidized particles. Mass transfer from the wall of the column to the fluid in the presence of inert fluidized particles was experimentally investigated using the dissolution method. Experiments were carried out in a column 34 mm in diameter, divided by height into six segments. In all runs, mass transfer rates were determined in the presence of fluidized spherical glass particles 1.10 mm, 1.94 mm and 2.98 mm in diameter, using water as the fluidized medium. The analysis of the boundary layer shows the effect of particles presence on mass transfer in fluidized systems. The theoretical model was established based on boundary layer theory, and the impact of particles on the shortening of the boundary layer length, due to their collision with the wall of the column. The theoretically derived model was compared with experimentally obtained data and with... data calculated from available literature correlations. Very good agreement was found between the model, experimental data, and published correlations (especially the correlation by Pickett et al. 12]).

Keywords:
Diffusion boundary layer / Particulate fluidized bed / Particle-wall collision / Mass transfer
Source:
Powder Technology, 2016, 303, 68-75
Publisher:
  • Elsevier Science Bv, Amsterdam
Projects:
  • The development of efficient chemical-engineering processes based on the transport phenomena research and process intensification principles (RS-172022)

DOI: 10.1016/j.powtec.2016.09.025

ISSN: 0032-5910

WoS: 000386410900009

Scopus: 2-s2.0-84988370266
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URI
http://cer.ihtm.bg.ac.rs/handle/123456789/1931
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IHTM

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