Dissolution of cerium oxide in sulfuric acid

被引：0

作者：

Um N. ^{[1
]}

Miyake M. ^{[1
]}

Hirato T. ^{[1
]}

机构：

[1] Department of Energy Science and Technology, Kyoto University, Kyoto, 611-0011, Yoshida-honmachi, Sakyo-ku

来源：

Green Energy and Technology | 2011年 / 66卷

关键词：

Cerium oxide; Cerium polishing powder waste; Extraction; Hydrometallurgy; Sulfuric acid;

D O I：

10.1007/978-4-431-53910-0_22

中图分类号：

学科分类号：

摘要：

The dissolution behavior of CeO2 in sulfuric acid was examined using a batch reactor with various acid concentrations (8-14 M) at different temperatures (75-130°C). The dissolution of CeO2 was slow and it took more than 3 days to dissolve 4 mmol of a CeO2 powder completely in 100 mL of 12 M sulfuric acid at 90°C. The dissolution rate increased with increases in the temperature and the sulfuric acid concentration. The dissolution rate could be expressed by a shrinking sphere kinetics model. The variation of the dissolution rate constant with temperature obeyed the Arrhenius equation with the activation energy of 120 kJ mol-1. The reaction rate constant was a function of the acid concentration as C6.5. © Springer 2011.

引用

页码：165 / 170

页数：5

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