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CFD-DEM Study of Temperature and Concentration Distribution in a Polyethylene Fluidized Bed Reactor.

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Title: CFD-DEM Study of Temperature and Concentration Distribution in a Polyethylene Fluidized Bed Reactor.
Authors: Karimi, Sedigheh1 (AUTHOR), Mansourpour, Zahra1 (AUTHOR), Mostoufi, Navid1 (AUTHOR) mostoufi@ut.ac.ir, Sotudeh-Gharebagh, Rahmat1 (AUTHOR)
Source: Particulate Science & Technology. Mar/Apr2011, Vol. 29 Issue 2, p163-178. 16p. 4 Diagrams, 3 Charts, 5 Graphs.
Subjects: Polyethylene, Fluidized reactors, Fluidized-bed furnaces, Fluid dynamics, Navier-Stokes equations, Heat equation, Temperature, High pressure (Science), Thermal properties of gases, Particles
Abstract: Comprehensive modeling of the gas-phase polyethylene reactor was developed by combining discrete element method (for predicting motion of particulates), Navier-Stokes equation (for predicting velocity fields of gas phase), mass conservation equation (for predicting concentration of reactants), and energy conservation equation (for predicting temperature). A comprehensive kinetic mechanism was used to evaluate the rate of ethylene and 1-butene copolymerization reactions. Simultaneous solution of these equations provided information about concentration, temperature, and velocity fields and their effect on the final performance of the reactor, as well as detection of possible hot spot zones. The effect of critical reactor operating parameters (such as inlet gas velocity and operating pressure) on the temperature distributions of gas and particles in the bed was also studied to investigate the possibility of hot spot formation in the reactor. The results showed that bed temperature decreases with increasing inlet gas velocity. Also, the bed temperature profile decreases at higher pressures due to more efficient contact between gas and particles. [ABSTRACT FROM AUTHOR]
Copyright of Particulate Science & Technology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 59131345
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  Label: Title
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  Data: CFD-DEM Study of Temperature and Concentration Distribution in a Polyethylene Fluidized Bed Reactor.
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  Data: <searchLink fieldCode="AR" term="%22Karimi%2C+Sedigheh%22">Karimi, Sedigheh</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mansourpour%2C+Zahra%22">Mansourpour, Zahra</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mostoufi%2C+Navid%22">Mostoufi, Navid</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> mostoufi@ut.ac.ir</i><br /><searchLink fieldCode="AR" term="%22Sotudeh-Gharebagh%2C+Rahmat%22">Sotudeh-Gharebagh, Rahmat</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Particulate+Science+%26+Technology%22">Particulate Science & Technology</searchLink>. Mar/Apr2011, Vol. 29 Issue 2, p163-178. 16p. 4 Diagrams, 3 Charts, 5 Graphs.
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  Data: <searchLink fieldCode="DE" term="%22Polyethylene%22">Polyethylene</searchLink><br /><searchLink fieldCode="DE" term="%22Fluidized+reactors%22">Fluidized reactors</searchLink><br /><searchLink fieldCode="DE" term="%22Fluidized-bed+furnaces%22">Fluidized-bed furnaces</searchLink><br /><searchLink fieldCode="DE" term="%22Fluid+dynamics%22">Fluid dynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Navier-Stokes+equations%22">Navier-Stokes equations</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+equation%22">Heat equation</searchLink><br /><searchLink fieldCode="DE" term="%22Temperature%22">Temperature</searchLink><br /><searchLink fieldCode="DE" term="%22High+pressure+%28Science%29%22">High pressure (Science)</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+properties+of+gases%22">Thermal properties of gases</searchLink><br /><searchLink fieldCode="DE" term="%22Particles%22">Particles</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Comprehensive modeling of the gas-phase polyethylene reactor was developed by combining discrete element method (for predicting motion of particulates), Navier-Stokes equation (for predicting velocity fields of gas phase), mass conservation equation (for predicting concentration of reactants), and energy conservation equation (for predicting temperature). A comprehensive kinetic mechanism was used to evaluate the rate of ethylene and 1-butene copolymerization reactions. Simultaneous solution of these equations provided information about concentration, temperature, and velocity fields and their effect on the final performance of the reactor, as well as detection of possible hot spot zones. The effect of critical reactor operating parameters (such as inlet gas velocity and operating pressure) on the temperature distributions of gas and particles in the bed was also studied to investigate the possibility of hot spot formation in the reactor. The results showed that bed temperature decreases with increasing inlet gas velocity. Also, the bed temperature profile decreases at higher pressures due to more efficient contact between gas and particles. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Particulate Science & Technology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1080/02726351003758451
    Languages:
      – Code: eng
        Text: English
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      Pagination:
        PageCount: 16
        StartPage: 163
    Subjects:
      – SubjectFull: Polyethylene
        Type: general
      – SubjectFull: Fluidized reactors
        Type: general
      – SubjectFull: Fluidized-bed furnaces
        Type: general
      – SubjectFull: Fluid dynamics
        Type: general
      – SubjectFull: Navier-Stokes equations
        Type: general
      – SubjectFull: Heat equation
        Type: general
      – SubjectFull: Temperature
        Type: general
      – SubjectFull: High pressure (Science)
        Type: general
      – SubjectFull: Thermal properties of gases
        Type: general
      – SubjectFull: Particles
        Type: general
    Titles:
      – TitleFull: CFD-DEM Study of Temperature and Concentration Distribution in a Polyethylene Fluidized Bed Reactor.
        Type: main
  BibRelationships:
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      – PersonEntity:
          Name:
            NameFull: Karimi, Sedigheh
      – PersonEntity:
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            NameFull: Mansourpour, Zahra
      – PersonEntity:
          Name:
            NameFull: Mostoufi, Navid
      – PersonEntity:
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            NameFull: Sotudeh-Gharebagh, Rahmat
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            – D: 01
              M: 03
              Text: Mar/Apr2011
              Type: published
              Y: 2011
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              Value: 02726351
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              Value: 29
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              Value: 2
          Titles:
            – TitleFull: Particulate Science & Technology
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