VTechWorks staff will be away for the winter holidays starting Tuesday, December 24, 2024, through Wednesday, January 1, 2025, and will not be replying to requests during this time. Thank you for your patience, and happy holidays!
 

Synthesis, characterization and reactivity of tungsten oxynitride

Simple item page
dc.contributor.authorLucy, Toby E.en
dc.contributor.committeechairOyama, Shigeo Teden
dc.contributor.committeememberCox, David F.en
dc.contributor.committeememberDavis, Richey M.en
dc.contributor.departmentChemical Engineeringen
dc.date.accessioned2014-03-14T21:48:43Zen
dc.date.adate2008-11-01en
dc.date.available2014-03-14T21:48:43Zen
dc.date.issued1996-08-30en
dc.date.rdate2008-11-01en
dc.date.sdate2008-11-01en
dc.description.abstractHigh surface area tungsten oxynitride samples have been prepared by the temperature programmed reaction (TPR) of W0₃ with NH₃. All samples were characterized by X-ray diffraction (XRD), nitrogen physisorption, and CO chemisorption. In addition, some sample compositions were determined by elemental analysis. Samples were prepared at various heating rates (β), allowing a Redhead analysis to be carried out giving an activation energy of nitridation of 109 kJ mol⁻¹. A heating rate of 0.016 K S⁻¹ gave optimum synthesis conditions. Solid state intermediates were studied by interruption of the temperature program at various stages. No distinct suboxide phases formed along the synthesis path were found using XRD. An increase in surface area, CO uptake and nitrogen weight content, were found to occur as the reaction progressed. Reactivity experiments showed reasonable hydro deoxygenation (HDO) and hydrodenitrogenation (HDN) activities, but little hydrogenation (HYD) or hydrodesulfurization (HDS) activities.en
dc.description.degreeMaster of Scienceen
dc.format.extentiv, 53 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-11012008-063455en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-11012008-063455/en
dc.identifier.urihttp://hdl.handle.net/10919/45408en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1996.L839.pdfen
dc.relation.isformatofOCLC# 35950249en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectreactivityen
dc.subjectsynthesisen
dc.subjectcatalysisen
dc.subjecttungsten nitrideen
dc.subjectTPRen
dc.subject.lccLD5655.V855 1996.L839en
dc.titleSynthesis, characterization and reactivity of tungsten oxynitrideen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineChemical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
LD5655.V855_1996.L839.pdf
Size:
1.51 MB
Format:
Adobe Portable Document Format
Download

Collections

Masters Theses