C.C. Hinckley
Gerard V. Smith
T. Nishizawa
Mykola Saporoschenko
R.H. Shiley
J.R. Webster
T. Wiltowski
1987
<p><span>The reduction of iron sulfides by hydrogen and by carbon monoxide has been studied using plug flow and thermogravimetric methods. The reactions were studied in the 523–723°K temperature range and were found to be first-order processes. Plug flow studies were used to correlate reaction rates between pyrite and the gases as a function of the surface area of the pyrite. The rate of H</span><sub>2</sub><span>S formation increases with the surface area of the pyrite sample. The results of thermogravimetric experiments indicate that the reactions consist of several steps. Rate constants for the pyrite reduction by H</span><sub>2</sub><span> and by CO were obtained. The activation energies increased with degree of reduction. Values of </span><i>E</i><sub>a</sub><span> were 113.2 (step I) and 122.5 kJ/mole (step II) for pyrite reduction with CO and 99.4 (step I), 122.4 (step II), 125.2 (step III), and 142.6 kJ/mole (step IV) for pyrite reduction with hydrogen.</span></p>
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10.1016/0022-4596(87)90146-0
en
Elsevier
Kinetics and mechanisms of iron sulfide reductions in hydrogen and in carbon monoxide
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