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Kannan J, Sande PC. Reinterpretation of the Geldart A powder classification based on Eulerian–Eulerian CFD simulation. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2022. [DOI: 10.1515/ijcre-2022-0039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Geldart classified powders into four categories and assigned each category its own unique characteristic. Geldart A particles, being easily aeratable, show a unique feature of ‘Homogenous expansion’ before bubbling. In this work, an additional feature for the Geldart chart is proposed which adds significant utility for the processing of Geldart A particles. CFD was used to characterize the entire Geldart A region of the Geldart chart based on detailed fluidization behavior. For this, Eulerian–Eulerian Two-fluid model (TFM) simulations were conducted for 25 particle systems across the entire span of the Geldart A region. The simulations (Solid volume fraction (SVF) contours) of bed evolution, taken before the appearance of multiple bubbles, were analyzed in detail. The particle systems were then sub-categorized into Red (5% average bed expansion), Orange (12.5% average bed expansion), and Green (30% average bed expansion) sub-types. The sub-types were plotted on Geldart chart, and for the first time a continuum heat map was generated, from which the ‘level of fluidizability’ of all Geldart A powders can be conveniently gaged. The map can be used for a more informed choice of powder for various industrial applications. Also, the A/B boundary proposed by Verloop was found to be a better fit for our proposed continuum when compared to the original Geldart A/B boundary. The 2D Simulation results performed in this work, found adequate validation against experimental findings in literature. Further, fine mesh 2D simulation results compared well with 3D simulations for dense bed, and were thereby deemed adequate for revealing dense bed behavior before onset of multiple bubbles.
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Affiliation(s)
- Janani Kannan
- Department of Chemical Engineering , Birla Institute of Technology and Science , Pilani , 333031 , India
| | - Priya C. Sande
- Faculty of Chemical Engineering, Birla Institute of Technology and Science , Pilani , 333031 , India
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Chen S, Juan X, Weixiang L, Simin W, Jiyuan T, Jian W. Numerical investigation of flow, heat transfer, and kinetic reaction in a large‐difference bidisperse, circulating fluidized‐bed reactor. CAN J CHEM ENG 2022. [DOI: 10.1002/cjce.24367] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Song Chen
- School of Chemical Engineering and Technology Xi'an Jiaotong University Xi'an Shaanxi China
| | - Xiao Juan
- School of Chemical Engineering and Technology Xi'an Jiaotong University Xi'an Shaanxi China
| | - Lin Weixiang
- School of Chemical Engineering and Technology Xi'an Jiaotong University Xi'an Shaanxi China
| | - Wang Simin
- School of Chemical Engineering and Technology Xi'an Jiaotong University Xi'an Shaanxi China
| | - Tu Jiyuan
- School of Engineering RMIT University Melbourne Vic Australia
| | - Wen Jian
- School of Energy and Power Engineering Xi'an Jiaotong University Xi'an Shaanxi China
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Do particle-related parameters influence circulating fluidized bed (CFB) riser flux and elutriation? Chem Eng Sci 2020. [DOI: 10.1016/j.ces.2020.115935] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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May J, Alobaid F, Stroh A, Daikeler A, Ströhle J, Epple B. Euler‐Lagrange‐Modell zur Simulation des Carbonate‐Looping‐Prozesses. CHEM-ING-TECH 2020. [DOI: 10.1002/cite.201900159] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jan May
- Technische Universität Darmstadt Fachgebiet Energiesysteme und Energietechnik Otto-Berndt-Straße 2 64287 Darmstadt Deutschland
| | - Falah Alobaid
- Technische Universität Darmstadt Fachgebiet Energiesysteme und Energietechnik Otto-Berndt-Straße 2 64287 Darmstadt Deutschland
| | - Alexander Stroh
- Technische Universität Darmstadt Fachgebiet Energiesysteme und Energietechnik Otto-Berndt-Straße 2 64287 Darmstadt Deutschland
| | - Alexander Daikeler
- Technische Universität Darmstadt Fachgebiet Energiesysteme und Energietechnik Otto-Berndt-Straße 2 64287 Darmstadt Deutschland
| | - Jochen Ströhle
- Technische Universität Darmstadt Fachgebiet Energiesysteme und Energietechnik Otto-Berndt-Straße 2 64287 Darmstadt Deutschland
| | - Bernd Epple
- Technische Universität Darmstadt Fachgebiet Energiesysteme und Energietechnik Otto-Berndt-Straße 2 64287 Darmstadt Deutschland
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Wu G, Chen W, He Y. Investigation on gas–solid flow behavior in a multistage fluidized bed by using numerical simulation. POWDER TECHNOL 2020. [DOI: 10.1016/j.powtec.2020.01.078] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Coarse grain 3D CFD-DEM simulation and validation with capacitance probe measurements in a circulating fluidized bed. Chem Eng Sci 2019. [DOI: 10.1016/j.ces.2018.11.052] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Daikeler A, Ströhle J, Epple B. Experimental flow structure analysis in a 1 MWth circulating fluidized bed pilot plant. Chem Eng Sci 2019. [DOI: 10.1016/j.ces.2018.10.037] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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