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

共 16 条

[1]

BOROWEIC K, UNPUB THERMOCHIM ACT

[2] KINETIC PARAMETERS FROM THERMOGRAVIMETRIC DATA [J].

COATS, AW ;

REDFERN, JP .

NATURE, 1964, 201 (491) :68-&

[3] Metallic titanium. [J].

Hunter, MA .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1910, 32 :330-336

[4]

JACKSON RB, 1959, Patent No. 2900234

[5]

KAWECKI HC, 1947, Patent No. 2418073

[6]

KAWECKI HC, 1949, Patent No. 2475287

[7]

Kroll W., 1940, US Patent, Patent No. [2205854, 2205854A]

[8]

KROLL WJ, 1953, MET IND LONDON, V8, P81

[9]

KROLL WJ, 1952, MET IND LONDON, V80, P343

[10]

KROLL WJ, 1952, MET IND LONDON, V80, P383

← 1 2 →