Investigation of reduction kinetics of Cr2O72- in FeSO4 solution

被引：12
|
作者：
Sevim, Fatih [1 ]
Demir, Derya [1 ]
机构：
[1] Ataturk Univ, Fac Engn, Dept Chem Engn, TR-25240 Erzurum, Turkey
来源：
CHEMICAL ENGINEERING JOURNAL | 2008年 / 143卷 / 1-3期
关键词：
chrome; electrochemistry; reduction kinetics; chemical reaction control model;
D O I：
10.1016/j.cej.2008.03.013
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The kinetics of reduction of potassium dichromate (K2Cr2O7) by Fe2+ ions in sulfuric acid (H2SO4) solution have been investigated under well-defined hydrodynamic conditions. The reaction has been monitored potentionnetrically by measuring volt values between saturated calomel electrode and a Pt electrode. The effect of stirring rate, particle size, temperature, Fe2+ and H+ concentrations have been studied. It was found that the reaction kinetic model achieved in the study was chemical reaction control model. The reaction has been analyzed using kinetic equation t = tau(1 -(1 - x)(1/3)). The rate has been found proportional to [Fe2+](0.5)[H+](0.5) and the apparent activation energy has been determined as 46.18 kJ mol(-1). (C) 2008 Elsevier B.V. All rights reserved.
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页码：161 / 166
页数：6
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