Kinetics of thermal decomposition of Th(C2O4)2•6H2O

被引：18

作者：

Joseph, K ^{[1
]}

Sridharan, R ^{[1
]}

Gnanasekaran, T ^{[1
]}

机构：

[1] Indira Gandhi Ctr Atom Res, Mat Chem Div, Chem Grp, Kalpakkam 603102, Tamil Nadu, India

来源：

JOURNAL OF NUCLEAR MATERIALS | 2000年 / 281卷 / 2-3期

关键词：

D O I：

10.1016/S0022-3115(00)00241-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Thermal decomposition of thorium oxalate hexahydrate was investigated under nonisothermal and isothermal conditions in moist argon by using simultaneous thermogravimetric-differential thermal analyser. Nonisothermal experiments were carried out at various linear heating rates. Intermediates formed in each stage of the thermal decomposition of thorium oxalate hexahydrate were deduced. Kinetics of decomposition in each stage were evaluated from the dynamic TGA-DTA data by means of Coats and Redfern equation. The values of the activation energy (E) and the pre-exponential factor (A) of each stage of the thermal decomposition at various linear heating rates were calculated. These kinetic parameters were evaluated from isothermal experiments also and probable decomposition mechanism is proposed. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：129 / 139

页数：11

共 13 条

[1] Kinetic study of the thermal decomposition of thorium oxalate dihydrate [J].

Aybers, MT .

JOURNAL OF NUCLEAR MATERIALS, 1998, 252 (1-2) :28-33

[2] THORIUM-OXIDE - CALCINATION, COMPACTION AND SINTERING [J].

BALAKRISHNA, P ;

VARMA, BP ;

KRISHNAN, TS ;

MOHAN, TRR ;

RAMAKRISHNAN, P .

JOURNAL OF NUCLEAR MATERIALS, 1988, 160 (01) :88-94

[3]

Brown ME, 1988, COMPREHENSIVE CHEM K, V22

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

COATS, AW ;

REDFERN, JP .

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

[5] THE THERMAL DECOMPOSITION OF THORIUM OXALATE [J].

DEYE, RWM ;

SELLMAN, PG .

JOURNAL OF INORGANIC & NUCLEAR CHEMISTRY, 1955, 1 (1-2) :143-148

[6] KINETICS OF DISSOCIATION OF HYDRATED CERIUM(III) SULFATE, NITRATE AND OXALATE IN AIR [J].

GADALLA, AM .

THERMOCHIMICA ACTA, 1985, 95 (01) :179-200

[7] METHOD OF ASSESSING SOLID-STATE REACTIVITY ILLUSTRATED BY THERMAL-DECOMPOSITION EXPERIMENTS ON SODIUM-BICARBONATE [J].

HEDA, PK ;

DOLLIMORE, D ;

ALEXANDER, KS ;

CHEN, D ;

LAW, E ;

BICKNELL, P .

THERMOCHIMICA ACTA, 1995, 255 :255-272

[8] NONISOTHERMAL KINETICS OF DEHYDRATION AND DECOMPOSITION OF NICKEL CHLORIDE HYDRATE [J].

KANUNGO, SB ;

MISHRA, SK .

THERMOCHIMICA ACTA, 1994, 241 :171-189

[9] THERMAL DECOMPOSITION OF SOME OXALATES [J].

PADMANABHAN, VM ;

SARAIYA, SC ;

SUNDARAM, AK .

JOURNAL OF INORGANIC & NUCLEAR CHEMISTRY, 1960, 12 (3-4) :356-359

[10] REACTION KINETICS OF SOME ACTINIDE OXALATES BY DIFFERENTIAL THERMAL ANALYSIS [J].

SUBRAMANIAN, MS ;

SINGH, RN ;

SHARMA, HD .

JOURNAL OF INORGANIC & NUCLEAR CHEMISTRY, 1969, 31 (12) :3789-+

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