Optimization fluidization characteristics conditions of nickel oxide for hydrogen reduction by fluidized bed reactor

Jae Rang Lee, Naim Hasolli, Seong Min Jeon, Kang San Lee, Kwang Deuk Kim, Yong Ha Kim, Kwan Young Lee, Young Ok Park

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We evaluated the optimal conditions for fluidization of nickel oxide (NiO) and its reduction into high-purity Ni during hydrogen reduction in a laboratory-scale fluidized bed reactor. A comparative study was performed through structural shape analysis using scanning electron microscopy (SEM); variance in pressure drop, minimum fluidization velocity, terminal velocity, reduction rate, and mass loss were assessed at temperatures ranging from 400 to 600 °C and at 20, 40, and 60 min in reaction time. We estimated the sample weight with most active fluidization to be 200 g based on the bed diameter of the fluidized bed reactor and height of the stocked material. The optimal conditions for NiO hydrogen reduction were found to be height of sample H to the internal fluidized bed reactor diameter D was H/D=1, reaction temperature of 550 °C, reaction time of 60 min, superficial gas velocity of 0.011 m/s, and pressure drop of 77 Pa during fluidization. We determined the best operating conditions for the NiO hydrogen reduction process based on these findings.

Original languageEnglish
Pages (from-to)2321-2326
Number of pages6
JournalKorean Journal of Chemical Engineering
Volume35
Issue number11
DOIs
Publication statusPublished - 2018 Nov 1

Keywords

  • Fluidized Bed Reactor
  • Hydrogen Reduction
  • Pressure Drop
  • Reduction Rate
  • Superficial Gas Velocity

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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