Isothermal kinetic analysis of the thermal decomposition of kaolinite: The thermogravimetric study

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F10%3APU88551" target="_blank" >RIV/00216305:26310/10:PU88551 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Isothermal kinetic analysis of the thermal decomposition of kaolinite: The thermogravimetric study

Popis výsledku v původním jazyce

In this kinetic study, the dehydroxylation of the medium ordered kaolinite was investigated under isothermal conditions by the thermogravimetric analysis (TGA). The kinetic model function (mechanism) of the process and important kinetic parameters, i.e.overall activation energy (EA) and pre-exponential (frequency) factor (A), were evaluated from the series of the thermogravimetric experiments in the temperature range from 370 to 500 .C. The linearization procedure on measured data indicates that dehydroxylation of kaolinite and metakaolinite formation up to the temperature 410 .C is controlled by the rate of the second-order chemical reaction. The overall activation energy and frequency factor of dehydroxylation were determined as 257 kJ mol-1 and 1.9x10E19 -1, respectively. Above 410 .C, the course of thermal decomposition of kaolinite corresponds to a third-order reaction with the EA value of 202 kJ mol-1 and 2.9x10E15 s-1, respectively.

Název v anglickém jazyce

Isothermal kinetic analysis of the thermal decomposition of kaolinite: The thermogravimetric study

Popis výsledku anglicky

In this kinetic study, the dehydroxylation of the medium ordered kaolinite was investigated under isothermal conditions by the thermogravimetric analysis (TGA). The kinetic model function (mechanism) of the process and important kinetic parameters, i.e.overall activation energy (EA) and pre-exponential (frequency) factor (A), were evaluated from the series of the thermogravimetric experiments in the temperature range from 370 to 500 .C. The linearization procedure on measured data indicates that dehydroxylation of kaolinite and metakaolinite formation up to the temperature 410 .C is controlled by the rate of the second-order chemical reaction. The overall activation energy and frequency factor of dehydroxylation were determined as 257 kJ mol-1 and 1.9x10E19 -1, respectively. Above 410 .C, the course of thermal decomposition of kaolinite corresponds to a third-order reaction with the EA value of 202 kJ mol-1 and 2.9x10E15 s-1, respectively.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JH - Keramika, žáruvzdorné materiály a skla

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2010

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Thermochimica Acta

ISSN

0040-6031

e-ISSN

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Svazek periodika

501

Číslo periodika v rámci svazku

1-2

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

6

Strana od-do

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Kód UT WoS článku

000276136400005

EID výsledku v databázi Scopus

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