Thermogravimetric analysis of pretreated Turkish lignites

Basit Öğe Kaydı
dc.contributor.authorCeylan, K
dc.contributor.authorKaraca, H
dc.contributor.authorÖnal, Y
dc.date.accessioned2024-08-04T20:11:59Z
dc.date.available2024-08-04T20:11:59Z
dc.date.issued1999
dc.departmentİnönü Üniversitesien_US
dc.description.abstractThe kinetics of nonisothermal pyrolysis of raw, demineralized or oxidized Turkish lignites have been investigated by thermogravimetry, differential thermal analysis and differential scanning calorimetry. The analyses were carried out in an inert atmosphere or in air atmosphere. The weight loss data indicate that pyrolysis characteristics of the lignites and the prevailing kinetic mechanism vary depending on temperature. The weight loss rates show essentially two regimes, and the major weight loss occurs in the range of 300 degrees C-650 degrees C. The results for the low temperature region (T < 200 degrees C) suggest that the weight loss may be represented by 1.2-1.4-th order of reaction with an activation energy of approximately 15-35 kJ mol(-1). The differential thermal analysis and the differential scanning calorimetry data gave similar values for the overall reaction order and activation energies for this temperature region. At the higher temperature region (T > 300 degrees C), 1.2-1.8-th order of reaction shows a good fit with the weight loss data. The values of the estimated activation energies for this region vary from approximately 40 to 85 kJ mol(-1) depending on the type of sample. However, the differential thermal analysis data suggest that the overall reaction order is around 1.0-1.2 and the effective activation energies vary approximately from 170 to 250 kJ mol(-1). (C) 1999 Elsevier Science Ltd. All rights reserved.en_US
dc.identifier.doi10.1016/S0016-2361(99)00009-5
dc.identifier.endpage1116en_US
dc.identifier.issn0016-2361
dc.identifier.issue9en_US
dc.identifier.scopus2-s2.0-0032685888en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage1109en_US
dc.identifier.urihttps://doi.org/10.1016/S0016-2361(99)00009-5
dc.identifier.urihttps://hdl.handle.net/11616/93145
dc.identifier.volume78en_US
dc.identifier.wosWOS:000080838900012en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier Sci Ltden_US
dc.relation.ispartofFuelen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectligniteen_US
dc.subjectthermogravimetryen_US
dc.subjectkineticsen_US
dc.titleThermogravimetric analysis of pretreated Turkish lignitesen_US
dc.typeArticleen_US

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