Gaseous reduction of Goro nickel oxide in hydrogen between 400&deg;C and 1000&deg;C.
Published: 2006
Language: eng
Number of pages: 96
ISBN-13: 9780494213070
Description: Goro nickel oxide particles with size range between 300mum and 600mum were reduced with hydrogen gas in the temperature range between 400&deg;C and 1000&deg;C. The rate of reduction increased with increasing temperature between 400&deg;C and 600&deg;C, but gradually decreased between 600&deg;C and 900&deg;C. It then increased dramatically between 950&deg;C and 1000&deg;C. Thermo-gravimetric analysis and shrinking core model were applied to analyze the kinetics of the gas-solid reaction in this case.The investigation found that between 400&deg;C and 600&deg;C, the rate of reduction is controlled by the chemical reaction. Above 600&deg;C, the rate controlling mechanism became a mixed model consisting of chemical reaction control and gas diffusion in solid product control. The influence of the latter became stronger as the temperature increased. Structural changes were also observed in reduced nickel at this stage and linked to the rate controlling mechanism.
Notes: Source: Masters Abstracts International, Volume: 45-03, page: 1632.

Thesis (M.A.Sc.)--University of Toronto, 2006.

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