New Catalysts for Hydroprocessing: Molybdenum and Tungsten Phosphide

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dc.contributor.authorClark, Paul Alexanderen
dc.contributor.committeechairOyama, Shigeo Teden
dc.contributor.committeememberVandsburger, Urien
dc.contributor.committeememberForsten-Williams, Kimberlyen
dc.contributor.committeememberKampe, Stephen L.en
dc.contributor.committeememberCox, David F.en
dc.contributor.departmentChemical Engineeringen
dc.date.accessioned2011-08-22T19:03:17Zen
dc.date.adate2000-11-27en
dc.date.available2011-08-22T19:03:17Zen
dc.date.issued1998-10-14en
dc.date.rdate2001-11-27en
dc.date.sdate2000-11-19en
dc.description.abstractThis dissertation describes the preparation and application of a novel class of hydroprocessing catalysts, transition metal phosphides. Concentration was placed on molybdenum and tungsten monophosphides because of the importance of these elements in standard sulfidic hydrotreating catalysts. Transition metal phosphides exist over a wide range of stoichiometry, and their properties have a great deal of variation, ranging from phosphorus poor compounds with metallic electrical properties to phosphorus rich compounds with semiconducting or insulating properties. The x-ray diffraction patterns of the phosphides studied here were unchanged under the conditions of catalytic hydroprocessing, demonstrating their stability toward the hydroprocessing conditions and allowing study of their intrinsic catalytic properties. Materials were prepared in bulk form, supported on alumina, and supported on silica. The mechanism of hydrodenitrogenation on MoP/SiO2 and WP/SiO2 catalysts was investigated by comparison of hydrodenitrogenation reactions of pyridine, piperidine, n-pentylamine, tert-pentylamine, and neo-pentylamine.en
dc.description.degreePh. D.en
dc.format.mediumETDen
dc.identifier.otheretd-11192000-22380039en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-11192000-22380039en
dc.identifier.urihttp://hdl.handle.net/10919/11224en
dc.publisherVirginia Techen
dc.relation.haspartContents.PDFen
dc.relation.haspartChapter6.PDFen
dc.relation.haspartChapter5.PDFen
dc.relation.haspartChapter2.PDFen
dc.relation.haspartVita1.PDFen
dc.relation.haspartChapter3.PDFen
dc.relation.haspartChapter7.PDFen
dc.relation.haspartChapter4.PDFen
dc.relation.haspartChapter1.PDFen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectphosphideen
dc.subjecttungstenen
dc.subjectmolybdenumen
dc.subjecthydrodenitrogenationen
dc.titleNew Catalysts for Hydroprocessing: Molybdenum and Tungsten Phosphideen
dc.typeDissertationen
thesis.degree.disciplineChemical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

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