The reaction process between .ALPHA.-iron(III) oxide and sulfur dioxide in the presence of carbon.
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概要
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The reaction products obtained by heating a mixture of α-Fe<SUB>2</SUB>O<SUB>3</SUB> and carbon in a SO<SUB>2</SUB> 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-Fe<SUB>2</SUB>O<SUB>3</SUB> and carbon in a SO<SUB>2</SUB> stream were Fe<SUB>3</SUB>O<SUB>4</SUB> at 500–700 °C, pyrrhotite and Fe<SUB>3</SUB>O<SUB>4</SUB> at 750 °C , and pyrrhotite (Fe<SUB>0.88</SUB>S) 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-Fe<SUB>2</SUB>O<SUB>3</SUB> and SO<SUB>2</SUB> in the presence of carbon can be represented as follows: The reaction between carbon and SO<SUB>2</SUB> occurs even at 350 °C to form sulfur, and the reaction proceeds markedly above <I>ca.</I> 700 °C. Above <I>ca.</I> 500 °C, the reductions of α-Fe<SUB>2</SUB>O<SUB>3</SUB> with carbon and sulfur occur to form Fe<SUB>3</SUB>O<SUB>4</SUB>. Above <I>ca.</I> 750 °C, pyrrhotite is formed by the reaction between Fe<SUB>3</SUB>O<SUB>4</SUB> and sulfur. These results were supported by the thermodynamical consideration based on the chemical potential diagram for the Fe–S–C–O system.
- 公益社団法人 日本化学会の論文
著者
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Eguchi Motonori
Research Laboratory of Resources Utilization, Tokyo Institute of Technology
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Ryoo Young
Research Laboratory of Resources Utilization, Tokyo Institute of Technology
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Saeki Yuzo
Research Laboratory of Resources Utilization, Tokyo Institute of Technology
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Matsuzaki Ryoko
Research Laboratory of Resources Utilization, Tokyo Institute of Technology
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Araki Hiromitsu
Research Laboratory of Resources Utilization, Tokyo Institute of Technology
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