Investigation of the Thermal Decomposition Kinetics of Chalcopyrite Ore Concentrate usng Thermogravimetric Data

Basit Öğe Kaydı
dc.authorid0000-0002-8574-1056en_US
dc.contributor.authorKizilca, Meltem
dc.contributor.authorÇopur, Mehmet
dc.date.accessioned2021-03-20T20:14:53Z
dc.date.available2021-03-20T20:14:53Z
dc.date.issued2016
dc.departmentBTÜ, Mühendislik ve Doğa Bilimleri Fakültesi, Kimya Mühendisliği Bölümüen_US
dc.description.abstractThe kinetics of the thermal decomposition of chalcopyrite concentrate was investigated by means of thermal analysis techniques, Thermogravimetry/Derivative thermogravimetry (TG/DTG) under ambient air conditions in the temperature range of 0-900 degrees C with heating rates of 2, 5, 10, 15, and 20 degrees C min(-1). TG and DTG measurements showed that the thermal behavior of chalcopyrite concentrate shows a two-step decomposition. The decomposition mechanism was confirmed using X-ray diffraction (XRD), Scanning Electron Microscope (SEM)/energy-dispersive X-ray spectroscopy (EDS), and Fourier transform infrared spectroscopy (FTIR) analyses. Kinetic parameters were determined from the TG and DTG curves for steps I and II by using two model-free (isoconversional) methodsFlyn-Wall-Ozowa (FWO) and Kissinger-Akahira-Sunose (KAS). The kinetic parameters consisting of E-a, A, and g() models of the materials were determined. The average activation energies (E-a) obtained from both models for the decomposition of chalcopyrite concentrate were 72.55 and 300.77kJmol(-1) and the pre-exponential factors (A) were 15.07 and 29.39 for steps I and II, respectively. The most probable kinetic model for the decomposition of chalcopyrite concentrate is an first-order mechanism, i.e., chemical reaction [g()=(-ln(1-))], and an Avrami-Eroeyev equation mechanism, i.e., nucleation and growth for n=2 [g()=(-ln(1-)(1/2))], for steps I and II, respectively.en_US
dc.identifier.doi10.1080/00986445.2015.1056298en_US
dc.identifier.endpage704en_US
dc.identifier.issn0098-6445
dc.identifier.issn1563-5201
dc.identifier.issue5en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage692en_US
dc.identifier.urihttp://doi.org/10.1080/00986445.2015.1056298
dc.identifier.urihttps://hdl.handle.net/20.500.12885/1121
dc.identifier.volume203en_US
dc.identifier.wosWOS:000372364100015en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorÇopur, Mehmet
dc.language.isoenen_US
dc.publisherTaylor & Francis Incen_US
dc.relation.ispartofChemical Engineering Communicationsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectChalcopyriteen_US
dc.subjectFWO methoden_US
dc.subjectIsoconversional methoden_US
dc.subjectKAS methoden_US
dc.subjectKinetic parametersen_US
dc.subjectThermal analysisen_US
dc.subjectThermal decompositionen_US
dc.titleInvestigation of the Thermal Decomposition Kinetics of Chalcopyrite Ore Concentrate usng Thermogravimetric Dataen_US
dc.typeArticleen_US

Dosyalar

Koleksiyon

WoS İndeksli Yayınlar Koleksiyonu
Kimya Mühendisliği Bölümü Yayın Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu