Designing novel DENOx catalysts with a wide thermal operational window

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buir.advisorÖzensoy, Emrah
dc.contributor.authorTohumeken, Merve
dc.date.accessioned2016-07-13T08:02:50Z
dc.date.available2016-07-13T08:02:50Z
dc.date.copyright2016-06
dc.date.issued2016-06
dc.date.submitted2016-06-24
dc.departmentDepartment of Chemistryen_US
dc.descriptionCataloged from PDF version of article.en_US
dc.descriptionThesis (M.S.): Bilkent University, Department of Chemistry, İhsan Doğramacı Bilkent University, 2016.en_US
dc.descriptionIncludes bibliographical references (leaves 72-79).en_US
dc.description.abstractThe main objective of this study is to design novel DeNOx catalyst to widen the operational temperature range of exhaust emission control systems. For this purpose, single and multi NOx-storage domains (e.g. K2O, BaO) were loaded on an Al2O3/ZrO2/TiO2 (AZT) ternary mixed oxide support with various compositions and different catalytic systems were synthesized by utilizing sol-gel and wetness impregnation methods. These materials were characterized by means of XRD, N2 sorption, in-situ FTIR and TPD measurements in comparison to the Pt/20Ba/Al benchmark catalyst. K2O and BaO co-loading on AZT sample reveals better platinum dispersion than that of the single storage domain materials. Particularly, Pt/5.4K-8Ba/AZT system revealed promising NOx storage capacity (NSC) and high sulfur removal performance. NOx/SOx adsorption geometries and stabilities of the generated adsorbates were analyzed using in-situ FTIR and TPD. Although the Pt/20Ba/AZT and Pt/10K/AZT catalysts revealed high NSC, they showed poor sulfur regeneration characteristics. In conclusion, it was demonstrated that K2O and BaO co-impregnated samples can be utilized to design new catalytic architectures to modify the operational temperature window of exhaust emission control catalysts.en_US
dc.description.degreeM.S.en_US
dc.description.provenanceSubmitted by Betül Özen (ozen@bilkent.edu.tr) on 2016-07-13T08:02:50Z No. of bitstreams: 1 Merve Tohumeken_Tez.pdf: 2945664 bytes, checksum: eb0d40ea7fd2af34e980a67bcf3c0e68 (MD5)en
dc.description.provenanceMade available in DSpace on 2016-07-13T08:02:50Z (GMT). No. of bitstreams: 1 Merve Tohumeken_Tez.pdf: 2945664 bytes, checksum: eb0d40ea7fd2af34e980a67bcf3c0e68 (MD5) Previous issue date: 2016-06en
dc.description.statementofresponsibilityby Merve Tohumeken.en_US
dc.embargo.release2018-06-22
dc.format.extentxvii, 79 leaves : illustrations, charts, graphics.en_US
dc.identifier.itemidB153625
dc.identifier.urihttp://hdl.handle.net/11693/30134
dc.language.isoEnglishen_US
dc.publisherBilkent Universityen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectNSR/DeNOx catalystsen_US
dc.subjectAl2O3/ZrO2/TiO2en_US
dc.subjectK2Oen_US
dc.subjectBaOen_US
dc.subjectPten_US
dc.subjectNOx storage capacityen_US
dc.subjectSulfur poisoningen_US
dc.titleDesigning novel DENOx catalysts with a wide thermal operational windowen_US
dc.title.alternativeGeniş sıcaklık aralığında çalışabilen yeni nesil DENOx katalizörlerinin tasarımıen_US
dc.typeThesisen_US

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