A kinetic study on methylation of naphthalene over Fe/ZSM-5 zeolite catalysts

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dc.contributor.authorGulec, Fatih
dc.contributor.authorOzen, Aysun
dc.contributor.authorNiftaliyeva, Aysel
dc.contributor.authorAydiin, Ayse
dc.contributor.authorSimsek, Emir Huseyin
dc.contributor.authorKaraduman, Ali
dc.date.accessioned2020-03-26T19:52:41Z
dc.date.available2020-03-26T19:52:41Z
dc.date.issued2018
dc.departmentSelçuk Üniversitesien_US
dc.description.abstract2,6-Dimethylnaphthalene is an important dimethylnaphthalene isomer which can be used in the production of polyethylene naphthalate. The novelty of this study is to reveal Langmuir-Hinshelwood and Eley-Rideal reaction rate equations for the methylation of naphthalene over Fe/ZSM-5 zeolite catalysts besides the proposed reaction rate equation. To investigate the kinetics and mechanisms of naphthalene methylation, the methylation experiments were carried out in a gas-solid catalytic fixed-bed reactor in the presence of Fe/ZSM-5 zeolite catalysts at two different temperatures (450 and 500 degrees C) and five different weight hourly space velocities (0.5, 1.0, 1.5, 2.0, 2.5, 3.0 h(-1)). A naphthalene:methanol:1,2,4-trimethyl benzene mixture having a 1:3:10 molar ratio was used as a feed stream. The methylation products were identified by using GC-MS. For the methylation kinetics of naphthalene, the reaction rates depending on the naphthalene and methanol concentration were determined. Furthermore, the effects of temperature and weight hourly space velocity on the conversion of naphthalene, the selectivity of 2,6-dimethylnaphthalene, and the ratio of 2-methylnaphthalene/1-methylnaphthalene were determined. The results of this study demonstrate that the Langmuir-Hinshelwood reaction mechanism for naphthalene methylation is more compatible at 450 degrees C and the Eley-Rideal reaction mechanism at 500 degrees C. Moreover, in addition to 2,6-dimethylnaphthalene, other dimethylnaphthalene and tri-methylnaphthalene isomers were formed in the methylation of naphthalene. The conversion of naphthalene reached approximately 70%. Moreover, the highest selectivity of 2,6-dimethylnaphthalene was almost 40%. The ratios of 2-methylnaphthalene/1-methylnaphalene demonstrate that the methylation of naphthalene to 2-methynaphthalene is much higher than to 1-methynaphthalene.en_US
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TUBITAK)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [112M297]en_US
dc.description.sponsorshipThe study was supported by The Scientific and Technological Research Council of Turkey (TUBITAK Project No. 112M297).en_US
dc.identifier.doi10.1007/s11164-017-3090-5en_US
dc.identifier.endpage67en_US
dc.identifier.issn0922-6168en_US
dc.identifier.issn1568-5675en_US
dc.identifier.issue1en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage55en_US
dc.identifier.urihttps://dx.doi.org/10.1007/s11164-017-3090-5
dc.identifier.urihttps://hdl.handle.net/20.500.12395/36245
dc.identifier.volume44en_US
dc.identifier.wosWOS:000419609200004en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherSPRINGERen_US
dc.relation.ispartofRESEARCH ON CHEMICAL INTERMEDIATESen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.selcuk20240510_oaigen_US
dc.subjectPENen_US
dc.subjectZeoliteen_US
dc.subjectMethylation kineticen_US
dc.subject2,6-Dimethylnaphthaleneen_US
dc.subjectLangmuir-Hinshelwooden_US
dc.subjectEley-Ridealen_US
dc.titleA kinetic study on methylation of naphthalene over Fe/ZSM-5 zeolite catalystsen_US
dc.typeArticleen_US

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