Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/2531
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dc.contributor.authorGönen, Mehmet-
dc.contributor.authorBalköse, Devrim-
dc.contributor.authorGupta, Ram B.-
dc.contributor.authorÜlkü, Semra-
dc.date.accessioned2016-11-28T08:03:51Z
dc.date.available2016-11-28T08:03:51Z
dc.date.issued2009-07
dc.identifier.citationGönen, M., Balköse, D., Gupta, R. B., and Ülkü, S. (2009).Supercritical carbon dioxide drying of methanol-Zinc borate mixtures. Industrial and Engineering Chemistry Research, 48(14), 6869-6876. doi:10.1021/ie9003046en_US
dc.identifier.issn0888-5885
dc.identifier.issn0888-5885-
dc.identifier.urihttp://dx.doi.org/10.1021/ie9003046
dc.identifier.urihttp://hdl.handle.net/11147/2531
dc.description.abstractSupercritical carbon dioxide (CO 2) drying of zinc borate species was investigated to evaluate possible chemical alterations in the product during the drying. Methanol-wetted zinc borates produced either from borax decahydrate and zinc nitrate hexahydrate (2ZnO · 3B 2O 3 ·7H 2O) or from zinc oxide and boric acid (2ZnO · 3B 2O 3 ·3H 2O) were dried by both conventional and supercritical carbon dioxide drying methods. Zinc borate samples dried by both techniques were characterized using analytical titration, X-ray powder diffraction (XRD), thermo gravimetric analysis (TGA), Fourier transform infrared (FTIR) spectroscopy, elemental analysis, and scanning electron microscopy (SEM). It was found that while zinc borate obtained from zinc oxide and boric acid did not have any chemical interaction with CO 2, carbonates were formed on the surface of zinc borate obtained from borax decahydrate and zinc nitrate hexahydrate. The main factor for the carbonate formation during supercritical CO 2 drying is anticipated as the structural differences of zinc borate species. CO 2 is a nonpolar solvent, and it does not usually react with polar substances unless water is present in the medium. While 2ZnO · 3B 2O 3 ·3H 2O had three bound OH groups, 2ZnO · 3B 2O 3 ·7H 2O had five bound OH groups and one mole of water of crystallization. It is proposed that the water of crystallization reacts with CO 2 forming carbonic acid. Then, carbonic acid, which is stronger than boric acid, substitutes borate ions from their zinc salts.en_US
dc.description.sponsorshipTÜBİTAK project number: 105M358en_US
dc.language.isoenen_US
dc.publisherAmerican Chemical Societyen_US
dc.relation.ispartofIndustrial and Engineering Chemistry Researchen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectZincen_US
dc.subjectBorate mineralsen_US
dc.subjectCarbonate formationsen_US
dc.subjectChemical alterationen_US
dc.subjectWater of crystallizationen_US
dc.titleSupercritical carbon dioxide drying of methanol-Zinc borate mixturesen_US
dc.typeArticleen_US
dc.institutionauthorGönen, Mehmet-
dc.institutionauthorBalköse, Devrim-
dc.institutionauthorÜlkü, Semra-
dc.departmentİzmir Institute of Technology. Chemical Engineeringen_US
dc.identifier.volume48en_US
dc.identifier.issue14en_US
dc.identifier.startpage6869en_US
dc.identifier.endpage6876en_US
dc.identifier.wosWOS:000268138300044en_US
dc.identifier.scopus2-s2.0-67849133304en_US
dc.relation.tubitakinfo:eu-repo/grantAgreement/TUBITAK/MAG/105M358en_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.identifier.doi10.1021/ie9003046-
dc.relation.doi10.1021/ie9003046en_US
dc.coverage.doi10.1021/ie9003046en_US
dc.identifier.wosqualityQ2-
dc.identifier.scopusqualityQ1-
item.openairetypeArticle-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
item.languageiso639-1en-
item.cerifentitytypePublications-
item.grantfulltextopen-
crisitem.author.dept03.02. Department of Chemical Engineering-
crisitem.author.dept03.02. Department of Chemical Engineering-
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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