The kinetics of reduction of dense synthetic nickel oxide in H-2-N-2 and H-2-H2O atmospheres

Hidayat, T., Rhamdhani, M.A., Jak, E. and Hayes, P,C. (2009) The kinetics of reduction of dense synthetic nickel oxide in H-2-N-2 and H-2-H2O atmospheres. Metallurgical and Materials Transactions B, 40 1: 1-16. doi:10.1007/s11663-008-9212-0


Author Hidayat, T.
Rhamdhani, M.A.
Jak, E.
Hayes, P,C.
Title The kinetics of reduction of dense synthetic nickel oxide in H-2-N-2 and H-2-H2O atmospheres
Journal name Metallurgical and Materials Transactions B   Check publisher's open access policy
ISSN 1073-5615
Publication date 2009-01-06
Year available 2009
Sub-type Article (original research)
DOI 10.1007/s11663-008-9212-0
Open Access Status
Volume 40
Issue 1
Start page 1
End page 16
Total pages 16
Editor Laughlin, D.
Place of publication United States
Publisher Springer New York LLC
Language eng
Subject C1
0904 Chemical Engineering
84 Mineral Resources (excl. Energy Resources)
840299 Primary Mining and Extraction of Mineral Resources not elsewhere classified
091407 Pyrometallurgy
Abstract An investigation of the kinetics of reduction of dense synthetic nickel oxide has been carried out in H-2-N-2 and H-2-H2O mixtures between 500 A degrees C and 1000 A degrees C. The progress of the reduction was followed metallographically by the measurement of the advance of the nickel product layer. The influences of hydrogen partial pressure, hydrogen-steam ratio, and temperature were systematically investigated in both sets of the mixtures. Increasing hydrogen partial pressure under all conditions investigated results in an increase in the reduction rate. In H-2-N-2 mixtures and H-2-H2O mixtures with low steam content, the initial reduction rate was found to be first order with respect to hydrogen partial pressure. In both sets of mixtures, it was found that the progress of Ni thickness was not a monotonic function of temperature. A minimum rate of advancement of Ni product was observed between 600 A degrees C and 800 A degrees C, depending on the hydrogen partial pressures and reduction time. The change in reduction behavior is shown to be directly linked to changes in Ni product microstructure.
Keyword Hydrogen reduction
Gas
NiO
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
School of Chemical Engineering Publications
 
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Created: Sat, 18 Apr 2009, 00:14:57 EST by Gail Smith on behalf of School of Chemical Engineering