INTRINSIC KINETICS OF THE OXIDATION OF NA2TIF6 AND NA3TIF6

被引：4

作者：

BOROWIEC, K ^{[1
]}

PRZEPIERA, A ^{[1
]}

KOLBRECKA, K ^{[1
]}

机构：

[1] POLISH ACAD SCI,CTR APPL INORGAN CHEM,PL-72010 POLICE,POLAND

来源：

JOURNAL OF THERMAL ANALYSIS | 1991年 / 37卷 / 03期

关键词：

D O I：

10.1007/BF01913115

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The intrinsic kinetics, unaffected by diffusional and mass transfer effects, of the air oxidation of Na2TiF6 and Na3TiF6 were determined by using a nonisothermal technique. The oxidation of these sodium fluorotitanates proceeds through two-step reactions involving the formation of oxyfluorotitanate, i.e. Na3TiOF5, as the intermediate. The oxidation rate shows a first-order dependence on the amount of the unreacted solids for each of the two-step reactions for both fluorotitanates. The activation energy for the further oxidation of Na3TiOF5 to a mixture of NaF + TiO2 was determined to be 52.4 kJ/mol and 55.3 kJ/mol for Na2TiF6 and Na3TiF6 as reactants, respectively.

引用

页码：637 / 644

页数：8