Bulletin of the Chemical Society of Japan
Online ISSN : 1348-0634
Print ISSN : 0009-2673
ISSN-L : 0009-2673
The Reaction Process between α-Iron(III) Oxide and Sulfur Dioxide in the Presence of Carbon
Hiromitsu ArakiYoung Hong RyooMotonori EguchiRyoko MatsuzakiYuzo Saeki
Author information

1980 Volume 53 Issue 8 Pages 2271-2274


The reaction products obtained by heating a mixture of α-Fe2O3 and carbon in a SO2 stream at various temperatures were examined. The possible reactions during the above process were also examined. The solid products obtained by heating a mixture of α-Fe2O3 and carbon in a SO2 stream were Fe3O4 at 500–700 °C, pyrrhotite and Fe3O4 at 750 °C , and pyrrhotite (Fe0.88S) alone at 800 °C. Sulfur was obtained outside the heating zone throughout the temperature range. The process of the formation of pyrrhotite by the reaction between α-Fe2O3 and SO2 in the presence of carbon can be represented as follows: The reaction between carbon and SO2 occurs even at 350 °C to form sulfur, and the reaction proceeds markedly above ca. 700 °C. Above ca. 500 °C, the reductions of α-Fe2O3 with carbon and sulfur occur to form Fe3O4. Above ca. 750 °C, pyrrhotite is formed by the reaction between Fe3O4 and sulfur. These results were supported by the thermodynamical consideration based on the chemical potential diagram for the Fe–S–C–O system.

Information related to the author

This article cannot obtain the latest cited-by information.

© The Chemical Society of Japan
Previous article Next article