在非等温条件下石膏和硼石膏的加热脱水动力学研究

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在非等温条件下石膏和硼石膏的加热脱水动力学研究

I.Y.Elbeyli; S.Piskin

Department of Chemical Engineering, Yildiz Technical University, 34210, Topkapt, Istanbul,
Turkey

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2004-04-28 发布日期:2004-04-28
通讯作者: I.Y.Elbeyli

Thermal Dehydration Kinetics of Gypsum and Borogypsum under Non-isothermal Conditions

I.Y.Elbeyli; S.Piskin

Department of Chemical Engineering, Yildiz Technical University, 34210, Topkapt, Istanbul,
Turkey

Received:1900-01-01 Revised:1900-01-01 Online:2004-04-28 Published:2004-04-28
Contact: I.Y.Elbeyli

摘要/Abstract

摘要： Thermal dehydration of gypsum and borogypsum was investigated under nonisothermal
conditions in air by using simultaneous thermogravimetric-differentialthermal analyzer.
Nonisothermal experiments were carried out at various linear heating rates. Kinetics of
dehydration in the temperature range of 373-503 K were evaluated from the DTA (differential
thermal analysis)-TGA (thermogravimetric analysis) data by means of Coats-Redfern,Kissinger
and Doyle Equations. Values of the activation energy and the pre-exponential factor of the
dehydration were calculated. The results of thermal experiments and kinetic parameters
indicated that borogypsum is similar to gypsum from dehydration mechanism point of view
although it consists of boron and small amount of alkali metal oxides.

关键词: 热量分析;动力学;脱水技术;石膏;等温条件

Abstract: Thermal dehydration of gypsum and borogypsum was investigated under nonisothermal
conditions in air by using simultaneous thermogravimetric-differentialthermal analyzer.
Nonisothermal experiments were carried out at various linear heating rates. Kinetics of
dehydration in the temperature range of 373-503 K were evaluated from the DTA (differential
thermal analysis)-TGA (thermogravimetric analysis) data by means of Coats-Redfern,Kissinger
and Doyle Equations. Values of the activation energy and the pre-exponential factor of the
dehydration were calculated. The results of thermal experiments and kinetic parameters
indicated that borogypsum is similar to gypsum from dehydration mechanism point of view
although it consists of boron and small amount of alkali metal oxides.

Key words: gypsum, borogypsum, differential thermal analysis, thermogravimetric analysis, kinetics

I.Y.Elbeyli, S.Piskin. 在非等温条件下石膏和硼石膏的加热脱水动力学研究[J]. CIESC Journal.

I.Y.Elbeyli, S.Piskin. Thermal Dehydration Kinetics of Gypsum and Borogypsum under Non-isothermal Conditions[J]. .

在非等温条件下石膏和硼石膏的加热脱水动力学研究

Thermal Dehydration Kinetics of Gypsum and Borogypsum under Non-isothermal Conditions

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