Size effects in the catalysis of atmospheric oxidation of SO2 by iron ions

被引：0
|
作者：
Ermakov, A. N. [1 ]
Larin, I. K.
Ugarov, A. A.
Purmal, A. P.
机构：
[1] Russian Acad Sci, Inst Energy Problems Chem Phys, Chernogolovka 142432, Moscow, Russia
[2] Russian Acad Sci, Semenov Inst Chem Phys, Moscow 117977, Russia
来源：
KINETICS AND CATALYSIS | 2006年 / 47卷 / 06期
关键词：
D O I：
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中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The oxidation of SO, catalyzed by iron ions in cloud drops of various sizes is analyzed in terms of the reduced model of atmospheric processes. It is demonstrated for the first time that iron ions exert a catalytic effect only in the smallest (< 5 mu m) and the largest (> 100 mu m) drops. This behavior of iron ions is due to the variation of the concentration ratio between the active form Fe(III) and the inactive form Fe(II) in the drops. SO, oxidation in drops of intermediate sizes is slower, because most of the iron in these drops is in the Fe(II) state.
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页码：825 / 833
页数：9
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