THE THERMAL-DECOMPOSITION OF (NH4)[VO(O2)2(NH3)]

被引：9
|
作者：
STRYDOM, CA
DEWAAL, D
机构：
[1] Department of Chemistry, University of Pretoria, Pretoria
来源：
JOURNAL OF THERMAL ANALYSIS | 1992年 / 38卷 / 04期
关键词：
KINETIC INVESTIGATIONS; (NH4)[VO(O2)2(NH3);
D O I：
10.1007/BF01979427
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The compound, (NH4)[VO(O2)2(NH3)], thermally decomposes to ammonium metavanadate, which then decomposes to vanadium pentoxide. Using a heating rate of 5 deg.min-1, the first decomposition step occurs between 74-degrees and 102-degrees-C. The transformation degree dependence of the activation energy (alpha-E) is shown to follow a decreasing convex form, indicating that the first decomposition step is a complex reaction with a change in the limiting stage of the reaction. Infrared spectra indicated that the decomposition proceeds via the gradual reduction of the ratio of the '(NH4)2O' to 'V2O5' units from the original 1:1 ratio in ammonium metavanadate, which may be written as (NH4)2O.V2O5, to V2O5.
引用
收藏
页码：943 / 951
页数：9
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