中性水溶液中における硫酸第一鉄の空気酸化

URI http://repository.tsuyama-ct.ac.jp/metadata/513
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Title
中性水溶液中における硫酸第一鉄の空気酸化
Title Alternative
Air Oxidation of Aqueous Ferrous Sulfate Solution in the Neutral Region
Author
著者 樋口 敏三
著者(別表記) Higuchi Binzo
著者 川口 善澄
著者(別表記) Kawaguchi Yoshizumi
著者 朝木 善次郎
著者(別表記) Asaki Zenjiro
著者 近藤 良夫
著者(別表記) Kondo Yoshio
Abstract

The oxidation of FeSO4 solution by O2 gas was studied at pH between 6.0 and 7.7. The oxidation was presumed to be composed of the sequential steps of dissolution of O2 gas and reaction between Fe2+ ion and O2, and the rate determining steps were pursued. The rate of oxidation increased with pH. In the region of pH (at 25℃ and Re 4000), the overall rate was controlled by the transferring rate of 02 in the liquid boundary film adjacent to the gas bubbles. The rate of reaction between Fe2+ ion and O2 was revealed to be proportional to the 4/3th power of C(OH-). At the temperature below 15℃, (at pH 6.8 and Re 1000), the overall rate was affected by both rates of mass transfer of O2 and chemical reaction. From the calculated rate constant of the reaction between Fe2+ ion and O2, the activation energy of 21 kcal/mole was obtained. The overall rate of oxidation increased with the flow rate of gas stream (at 25℃ and pH 6.8). At lower Reynolds number, the oxidation was mass transfer control. When Reynolds number was higher, it was of mixed control of mass transfer of O2 and chemical reaction.

Subject
430 Chemistry
Publish Date
1979-10-15
Publication Title
津山工業高等専門学校紀要
Publication Title Alternative
Bulletin of Tsuyama National College of Technology
Volume
17
Start Page
7
End Page
17
ISSN
0287-7066
NCID
AN00149351
Publisher
津山工業高等専門学校
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Contents Type
Departmental Bulletin Paper
language
Japanese
File Version
publisher