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Kinetic studies on the reactions involved in the hot gas desulfurization using a regenerable iron oxide sorbent—II: Reactions of iron sulfide with oxygen and sulfur dioxide

✍ Scribed by S.C. Tseng; S.S. Tamhankar; C.Y. Wen

Publisher
Elsevier Science
Year
1981
Tongue
English
Weight
669 KB
Volume
36
Category
Article
ISSN
0009-2509

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✦ Synopsis

In the hot gas desulfurization process using iron oxide sorbent. the regeneration of the sultided iron oxide sorbent consists of two reactions: the oxidation of iron sulfide with air, and its reaction with the sulfur dioxide formed during the air oxidation. This part describes the kinetic studies on the reactions of iron sulfide (formed by the reactions of Fe20, with &-CO mixture and subsequently with H#) with oxygen and sulfur dioxide. The experimental and analysis procedures used are similar to those outlined in Part I of this paper.

The activation energies for the oxygen and the sulfur dioxide reactions are found to be 15.63 and 17.5 kcal/mol, respectively. Notably, the product oxides formed in the two cases arc different. With air, the reaction is fast and the final product is Fe*O,. whereas with SO2, the major product is Fe,O,, which slowly oxidizes to Fe203 in a secondary step. Also, in the latter reaction elemental sulfur is formed.

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