Premium
Kinetics of hydrogen reduction of cobalt sulfide
Author(s) -
Fahim M. A.,
Ford J. D.
Publication year - 1976
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450540617
Subject(s) - cobalt , pellets , sulfide , cobalt sulfide , hydrogen sulfide , swelling , materials science , kinetics , hydrogen , reaction rate constant , chemistry , atmospheric temperature range , metal , inorganic chemistry , chemical engineering , sulfur , thermodynamics , metallurgy , composite material , organic chemistry , quantum mechanics , engineering , physics , electrode , electrochemistry
The hydrogen reduction of cobalt sulfide (Co 9 S 8 ) at atmospheric pressure in the temperature range 600–800°C has been experimentally investigated. When sulfide pellets were used, the rate constants were overestimated. The true intrinsic kinetics of this reaction were obtained from another set of experiments using sulfide powder, under conditions such that the topochemical shrinking core model in the chemical control regime could be applied. In the temperature range 600–737°C, the rate constant for the powder reaction could be expressed as:\documentclass{article}\pagestyle{empty}\begin{document}$$ k = 15,600 \exp(-27,800/RT) $$\end{document}Above 780°C, cobalt metal whiskers were formed, and this led to swelling and cracking of pellets.