Hydrogen reduction kinetics of nickel sulfide in the presence of calcium oxide |
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| Authors: | Thiam Chye Tan J D Ford |
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| Affiliation: | (1) Department of Chemical Engineering, National University of Singapore, 0511 Kent Ridge, Singapore;(2) Department of Chemical Engineering, University of Waterloo, N2L 3G1 Waterloo, ON, Canada |
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| Abstract: | Recovery of pure nickel from nickel sulfide (Ni3S2) was studied by following to completion the hydrogen reduction reaction in the presence of calcium oxide. The effects of
reaction temperature, molar ratio of calcium oxide to nickel sulfide, bed depth, and particle size of the nickel sulfide powder
on the reaction were experimentally investigated. A simple empirical integrated rate equation describing the relationship
among these variables over the temperature range 773 to 973 K was derived. The activation energy for the scavenged reaction
was found to be 101.9 kJ from the experimental data. Over the range of experimental conditions, both globular and fibrous
forms of metallic nickel were observed. |
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