Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/4759
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dc.contributor.authorBayraktar, Oğuz-
dc.contributor.authorKugler, Edwin L.-
dc.date.accessioned2016-06-13T11:01:14Z
dc.date.available2016-06-13T11:01:14Z
dc.date.issued2004
dc.identifier.citationBayraktar, O., and Kugler, E. L. (2004). Temperature-programmed oxidation of equilibrium fluid catalytic cracking catalysts: Effects of pretreatment on coke formation. Journal of Thermal Analysis and Calorimetry, 75(3), 989-998. doi:10.1023/B:JTAN.0000027192.43670.1ben_US
dc.identifier.issn1388-6150
dc.identifier.issn1388-6150-
dc.identifier.urihttp://doi.org/10.1023/B:JTAN.0000027192.43670.1b
dc.identifier.urihttp://hdl.handle.net/11147/4759
dc.description.abstractCharacterization of coke on equilibrium, fluid catalytic cracking (FCC) catalysts contaminated with metals was investigated using temperature-programmed oxidation (TPO). TPO spectra of spent equilibrium catalysts from cracking of sour imported heavy gas oil (SIHGO) were deconvoluted into four peaks (Peak K, L, M and N). The four peaks were assigned to different types of coke on the catalyst. Peak L in the TPO spectrum was assigned to the 'contaminant' coke in the vicinity of metals. The amount of contaminant coke (Peak L) correlates with metal-contaminant concentration. The size of Peak L which is related to amount of contaminant coke decreased significantly for the spent highly contaminated catalyst pretreated with hydrogen and methane prior to cracking reactions as compared to the non-pretreated catalysts. Since both hydrogen and methane pretreatment can reduce oxidation state of the vanadium that present at high concentrations on the equilibrium catalysts the decrease in the amount of contaminant-coke represented by Peak L was explained by the reduction of the oxidation state of vanadium. Less contaminant coke was produced after the equilibrium catalysts were pretreated using hydrogen and methane gases since reduced vanadium has lower dehydrogenation activity compared to oxidized vanadium.en_US
dc.language.isoenen_US
dc.publisherSpringer Verlagen_US
dc.relation.ispartofJournal of Thermal Analysis and Calorimetryen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectCoke characterizationen_US
dc.subjectFCC catalystsen_US
dc.subjectPretreatmenten_US
dc.subjectTemperature-programmed oxidationen_US
dc.subjectVanadiumen_US
dc.subjectMetallurgical cokeen_US
dc.titleTemperature-programmed oxidation of equilibrium fluid catalytic cracking catalysts: Effects of pretreatment on coke formationen_US
dc.typeArticleen_US
dc.institutionauthorBayraktar, Oğuz-
dc.departmentIzmir Institute of Technology. Chemical Engineeringen_US
dc.identifier.volume75en_US
dc.identifier.issue3en_US
dc.identifier.startpage989en_US
dc.identifier.endpage998en_US
dc.identifier.wosWOS:000220510700026en_US
dc.identifier.scopus2-s2.0-1842563129en_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.identifier.doi10.1023/B:JTAN.0000027192.43670.1b-
dc.relation.doi10.1023/B:JTAN.0000027192.43670.1ben_US
dc.coverage.doi10.1023/B:JTAN.0000027192.43670.1ben_US
item.grantfulltextopen-
item.fulltextWith Fulltext-
item.languageiso639-1en-
item.openairetypeArticle-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.cerifentitytypePublications-
Appears in Collections:Chemical Engineering / Kimya Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection
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