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Characterization of fluidization regime in circulating fluidized bed reactor with high solid particle concentration using computational fluid dynamics

  • Polymer, Industrial Chemistry, Fluidization, Particle Technology
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Abstract

The hydrodynamics inside a high solid particle concentration circulating fluidized bed reactor was investigated using computational fluid dynamics simulation. Compared to a low solid particle reactor, all the conventional fluidization regimes were observed. In addition, two unconventional fluidization regimes, circulating-turbulent and dense suspension bypassing regimes, were found with only primary gas injection. The circulating-turbulent fluidization regime showed uniformly dense solid particle distribution in all the system directions, while the dense suspension bypassing fluidization regime exhibited the flow of solid particles at only one side system wall. Then, comprehensive fluidization regime clarification and mapping were evaluated using in-depth system parameters. In the circulating-turbulent fluidization regime, the total granular temperature was low compared to the adjacent fluidization regimes. In the dense suspension bypassing fluidization regime, the highest total granular temperature was obtained. The circulating-turbulent and dense suspension bypassing fluidization regimes are suitable for sorption and transportation applications, respectively.

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Authors and Affiliations

  1. Fuels Research Center, Department of Chemical Technology, Faculty of Science, Chulalongkorn University, 254 Phayathai Road, Patumwan, Bangkok, 10330, Thailand

    Benjapon Chalermsinsuwan, Theeranan Thummakul & Pornpote Piumsomboon

  2. Center of Excellence on Petrochemical and Materials Technology, Chulalongkorn University, 254 Phayathai Road, Patumwan, Bangkok, 10330, Thailand

    Benjapon Chalermsinsuwan & Pornpote Piumsomboon

  3. Department of Chemical and Biological Engineering, Armour College of Engineering, Illinois Institute of Technology, 10 W. 33rd Street, Chicago, IL, 60616, USA

    Dimitri Gidaspow

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  1. Benjapon Chalermsinsuwan
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  2. Theeranan Thummakul
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  3. Dimitri Gidaspow
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  4. Pornpote Piumsomboon
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Correspondence to Benjapon Chalermsinsuwan.

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Chalermsinsuwan, B., Thummakul, T., Gidaspow, D. et al. Characterization of fluidization regime in circulating fluidized bed reactor with high solid particle concentration using computational fluid dynamics. Korean J. Chem. Eng. 31, 350–363 (2014). https://doi.org/10.1007/s11814-013-0240-3

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  • DOI: https://doi.org/10.1007/s11814-013-0240-3

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