Show simple item record

dc.contributor.advisorCardona-Martínez, Nelson
dc.contributor.authorOyola-Rivera, Oscar
dc.date.accessioned2018-05-16T15:23:37Z
dc.date.available2018-05-16T15:23:37Z
dc.date.issued2014
dc.identifier.urihttps://hdl.handle.net/20.500.11801/498
dc.description.abstractThe production of methanol and dimethyl ether via CO2 hydrogenation was studied using Pd catalysts supported on α-Ga2O3, α-β-Ga2O3 and β-Ga2O3 polymorphs. The catalytic activity improves with the increase in the content of Pd2Ga intermetallic compound over the surface. The content of Pd2Ga over Pd/Ga2O3, reduced at 573 K, depends on the Ga2O3 crystalline phase present on the catalyst. A slight catalytic deactivation with time on stream was observed. The catalyst supported over α-β-Ga2O3 displayed the largest deactivation. The deactivation of the material appears to be the result of a loss of basic sites over the catalysts surface. The selectivity to dimethyl ether is not dependent on the Pd2Ga content, but depends on the catalyst acidity. The content of Pd2Ga over Pd/Ga2O3 catalysts was identified to be a crucial parameter for CO2 hydrogenation to methanol and dimethyl ether.
dc.description.abstractSe estudió la producción de metanol y éter dimetílico a través de la hidrogenación de CO2 utilizando catalizadores de Pd soportados sobre α-Ga2O3, α-β-Ga2O3 y β-Ga2O3. La actividad catalítica mejora con el aumento en el contenido del compuesto intermetálico Pd2Ga sobre la superficie. El contenido de Pd2Ga sobre los catalizadores de Pd/Ga2O3, reducidos a 573 K, depende del polimorfo de Ga2O3 presente en el catalizador. Se observó una desactivación catalítica leve con el tiempo en flujo. La desactivación aparenta ser mayor sobre el catalizador con soporte α-β-Ga2O3. La desactivación del material parece ser resultado de una pérdida de lugares básicos sobre la superficie de los catalizadores. La selectividad al éter dimetílico es independiente del contenido de Pd2Ga, pero depende de la acidez del catalizador. Se identificó que el contenido de Pd2Ga sobre catalizadores Pd/Ga2O3 puede ser un parámetro crucial para la hidrogenación de CO2 a metanol y éter de dimetílico.
dc.description.sponsorshipNational Science Foundation (NSF) Partnership for Research and Education in Materialsen_US
dc.language.isoenen_US
dc.subjectPd catalysts supporteden_US
dc.subjectCO2 hydrogenationen_US
dc.subjectHydrocarbonsen_US
dc.subject.lcshHydrogenationen_US
dc.subject.lcshPalladium catalystsen_US
dc.subject.lcshCatalysisen_US
dc.subject.lcshGalliumen_US
dc.titleCatalytic conversion of CO2 to hydrocarbonsen_US
dc.typeThesisen_US
dc.rights.licenseAll rights reserveden_US
dc.rights.holder(c) 2014 Oscar Oyola Riveraen_US
dc.contributor.committeeMartínez Iñesta, María
dc.contributor.committeeCuret Arana, María
dc.contributor.committeeAcevedo Rullán, Aldo
dc.contributor.representativeRivera Montalvo, Luis
thesis.degree.levelM.S.en_US
thesis.degree.disciplineChemical Engineeringen_US
dc.contributor.collegeCollege of Engineeringen_US
dc.contributor.departmentDepartment of Chemical Engineeringen_US
dc.description.graduationSemesterSpringen_US
dc.description.graduationYear2014en_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

  • Theses & Dissertations
    Items included under this collection are theses, dissertations, and project reports submitted as a requirement for completing a graduate degree at UPR-Mayagüez.

Show simple item record

All rights reserved
Except where otherwise noted, this item's license is described as All Rights Reserved