Effect of extended single/multi-jet nozzles in a fluidized bed reactor on growth of granular polysilicon

Hokyu Moon, Hwang Suk Kim, Jiwoon Song, Hwanseong Lee, Hyun Goo Kwon, Yoon sub Jung, Hyung Hee Cho

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The influence of extended single- and multi-jet nozzles in a fluidized bed reactor on growth of granular polysilicon was studied, experimentally and numerically. Three-dimensional (3D) unsteady computational fluid dynamics (CFD) calculations were performed using the Fluent commercial CFD package. The Eulerian-Eulerian multiphase model was applied for the bulk motion of the two-phase flow, and the kinetic theory of granular flow was used to predict the solid-phase interactions. 3D cold-model reactor experiments were performed to validate the models and conditions used for the CFD simulations. The CFD-predicted pressure drop and bed expansion agreed reasonably well with the cold-model reactor test data. For a single-jet nozzle, superimposed bubbling and spouting behavior were observed in the bed. The effects of the single-jet intensity were also examined. For multi-jet nozzles, the mixing performance was much improved in the reaction zone and the dead reaction zone was reduced compared to the single-jet nozzle. Furthermore, determining the optimal configuration of multi-jets nozzles is necessary to minimize or avoid wall deposition as well as enlarging reaction zone.

Original languageEnglish
Pages (from-to)242-252
Number of pages11
JournalChemical Engineering Journal
Volume248
DOIs
Publication statusPublished - 2014 Jul 15

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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