Reduction of ilmenite with hydrogen

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

The kinetics and the mechanism of reduction of synthetic ilmenite by hydrogen in the temperature range of 807-1014°C were investigated. At temperatures below 876°C, the temporal profiles of conversion have a sigmoidal shape and indicate the presence of three different stages (induction, acceleration, and deceleration) during the reduction reaction. The apparent activation energy for the reaction is 22.3 kcal/mol, whereas the intrinsic activation energy is 16.9 kcal/mol. Scanning electron microscopy and energy-dispersive X-ray analyses show that the diffusion of Fe product away from the reaction front and through the TiO2 phase, followed by the nucleation and growth of a separate Fe phase, is an important step affecting the process kinetics. X-ray diffraction and wavelength-dispersive X-ray results indicate that the TiO2 can be reduced to lower oxides of titanium at temperatures higher than 876°C.

Original languageEnglish (US)
Pages (from-to)2080-2087
Number of pages8
JournalIndustrial and Engineering Chemistry Research
Volume30
Issue number9
StatePublished - Sep 1991

Fingerprint

Ilmenite
ilmenite
activation energy
Hydrogen
hydrogen
kinetics
Activation energy
nucleation
titanium
X rays
Kinetics
temperature
scanning electron microscopy
X-ray diffraction
Deceleration
oxide
wavelength
Temperature
Nucleation
Titanium

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Environmental Science(all)
  • Polymers and Plastics

Cite this

Reduction of ilmenite with hydrogen. / Zhao, Y.; Shadman, Farhang.

In: Industrial and Engineering Chemistry Research, Vol. 30, No. 9, 09.1991, p. 2080-2087.

Research output: Contribution to journalArticle

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