Investigation of the Dissolution Kinetics of Meta-Kaolin in H2SO4 Solution

被引：28

作者：

Altiokka, Mehmet Riza ^{[1
]}

Akalin, Handan ^{[1
]}

Melek, Nergis ^{[1
]}

Akyalcin, Sema ^{[1
]}

机构：

[1] Anadolu Univ, Dept Chem Engn, TR-26555 Eskisehir, Turkey

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2010年 / 49卷 / 24期

关键词：

CLAY; ACID;

D O I：

10.1021/ie101147n

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Kaolin with a given size distribution was calcined at 1023 K for 2 h then digested in 3 0, 4 5, and 60 N sulfuric acid at constant temperatures within the range 328-358 K The samples taken from the solution at predetermined time intervals were analyzed by using a complexometric method and the amount of aluminum passed into the solution was determined The results showed that the dissolution kinetics follow the shrinking core model for spherical particles of unchanging size, t/tau = 1 - (1 - x(B))(1/3), with the apparent activation energy of 98 4 kJ/mol The leaching reaction was found to be the 0 75th order with respect to acid concentration and controlled by reaction step

引用

页码：12379 / 12382

页数：4

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