Kinetic analysis of non-isothermal decomposition of dolomite in nitrogen atmosphere

Halikia, I; Ioannou, Z; Zoumpoulakis, L

dc.contributor.author	Halikia, I	en
dc.contributor.author	Ioannou, Z	en
dc.contributor.author	Zoumpoulakis, L	en
dc.date.accessioned	2014-03-01T01:56:20Z
dc.date.available	2014-03-01T01:56:20Z
dc.date.issued	2007	en
dc.identifier.issn	03719553	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/28061
dc.subject	Coats-Redfern method	en
dc.subject	Decomposition kinetics	en
dc.subject	Derivative thermogravimetry	en
dc.subject	Dolomite	en
dc.subject	Improved Coats-Redfern method	en
dc.subject	Ozawa method	en
dc.subject	Romero method	en
dc.subject	Thermogravimetry	en
dc.subject	Vyazovkin method	en
dc.subject.other	Activation energy	en
dc.subject.other	Heating	en
dc.subject.other	Nitrogen	en
dc.subject.other	Pyrolysis	en
dc.subject.other	Reaction kinetics	en
dc.subject.other	Thermal effects	en
dc.subject.other	Thermogravimetric analysis	en
dc.subject.other	Coats-Redfern methods	en
dc.subject.other	Decomposition kinetics	en
dc.subject.other	Derivative thermogravimetry	en
dc.subject.other	Dolomite	en
dc.subject.other	Improved Coats-Redfern methods	en
dc.subject.other	Ozawa methods	en
dc.subject.other	Romero methods	en
dc.subject.other	Vyazovkin methods	en
dc.subject.other	Carbonate minerals	en
dc.title	Kinetic analysis of non-isothermal decomposition of dolomite in nitrogen atmosphere	en
heal.type	journalArticle	en
heal.identifier.primary	10.1179/174328507X198591	en
heal.identifier.secondary	http://dx.doi.org/10.1179/174328507X198591	en
heal.publicationDate	2007	en
heal.abstract	In the present paper, a comparative study of five different non-isothermal kinetic analysis methods for the determination of the mechanism of the thermal decomposition of dolomite from thermogravlmetrlc experiments, is presented. The experiments were carried out in a thermo-gravimetric analyser under a nitrogen atmosphere from 50 to 1100°C under non-isothermal conditions at five different heating rates, i.e. 5, 10, 20, 30 and 40 K min-1. By applying each of these methods, the kinetic parameters of the reaction were evaluated and the discrimination of the conversion function (kinetic model) that best verifies the experimental data was attempted. From a comparative study of the results of the above methods, it was concluded that the heating rate affects the activation energy values. For the model free methods, the activation energy was calculated at 242-5 kJ mol-1 and the pre-exponentlal factor In (A, s-1) at 20-6, The phase boundary reaction model of zero order was found to best represent dolomite decomposition. © 2007 Institute of Materials, Minerals and Mining and The AusIMM.	en
heal.journalName	Transactions of the Institutions of Mining and Metallurgy, Section C: Mineral Processing and Extractive Metallurgy	en
dc.identifier.doi	10.1179/174328507X198591	en
dc.identifier.volume	116	en
dc.identifier.issue	3	en
dc.identifier.spage	163	en
dc.identifier.epage	170	en