Carbon monoxide clean-up of reformate gas by preferential oxidation

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dc.contributor.advisorFletcher, Jacken_ZA
dc.contributor.advisorBrosius, Roalden_ZA
dc.contributor.authorMuziki, Sibongileen_ZA
dc.date.accessioned2016-06-22T08:58:00Z
dc.date.available2016-06-22T08:58:00Z
dc.date.issued2015en_ZA
dc.description.abstractThe preferential oxidation (PrOx) activity of two Ru/Al2O3 catalysts prepared using different methods was tested. The first catalyst was prepared by wetness impregnation at a high pH and the second was prepared by incipient wetness impregnation. Catalytic activity was measured at varying temperatures, space velocities as well as O2/CO ratio. The Ru catalyst catalyst prepared using wetness impregnation at high pH was found to exhibit higher CO conversion despite having a lower Ru dispersion compared to the Ru catalyst prepared using incipient wetness impregnation at the tested temperature range. For both Ru catalysts the trends observed with varying temperature, space velocity as well as O2/CO ratio were similar. Increasing temperature increased CO conversion up to a maximum after which a further increase in temperature led to a decrease in CO conversion. At low temperatures, increasing space velocity resulted in a decrease in CO conversion. An increase in CO conversion was observed with increasing space velocity at higher temperatures. Increasing space velocity led to a decrease in CH4 formation at high temperatures. Furthermore it was determined that mass transfer limitations played a role during the catalytic process. The effects of mass transfer limitations could be reduced by increase the linear space velocity. A Pt-Fe/mordenite catalyst was prepared in this study using solid state ion exchange to deposit Fe and competitive ion exchange to deposit Pt. This method was proposed in order to try and improve the preparation method reported in literature. The synthesised catalyst did not perform as well as the Pt-Fe/Mordenite reported in literature. A maximum CO conversion of 99 % with 47 % CO2 selectivity at 180 °C, 120 000 ml/(h gcat) and O2/CO ratio of 1 was achieved.en_ZA
dc.identifier.apacitationMuziki, S. (2015). <i>Carbon monoxide clean-up of reformate gas by preferential oxidation</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering. Retrieved from http://hdl.handle.net/11427/20090en_ZA
dc.identifier.chicagocitationMuziki, Sibongile. <i>"Carbon monoxide clean-up of reformate gas by preferential oxidation."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering, 2015. http://hdl.handle.net/11427/20090en_ZA
dc.identifier.citationMuziki, S. 2015. Carbon monoxide clean-up of reformate gas by preferential oxidation. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Muziki, Sibongile AB - The preferential oxidation (PrOx) activity of two Ru/Al2O3 catalysts prepared using different methods was tested. The first catalyst was prepared by wetness impregnation at a high pH and the second was prepared by incipient wetness impregnation. Catalytic activity was measured at varying temperatures, space velocities as well as O2/CO ratio. The Ru catalyst catalyst prepared using wetness impregnation at high pH was found to exhibit higher CO conversion despite having a lower Ru dispersion compared to the Ru catalyst prepared using incipient wetness impregnation at the tested temperature range. For both Ru catalysts the trends observed with varying temperature, space velocity as well as O2/CO ratio were similar. Increasing temperature increased CO conversion up to a maximum after which a further increase in temperature led to a decrease in CO conversion. At low temperatures, increasing space velocity resulted in a decrease in CO conversion. An increase in CO conversion was observed with increasing space velocity at higher temperatures. Increasing space velocity led to a decrease in CH4 formation at high temperatures. Furthermore it was determined that mass transfer limitations played a role during the catalytic process. The effects of mass transfer limitations could be reduced by increase the linear space velocity. A Pt-Fe/mordenite catalyst was prepared in this study using solid state ion exchange to deposit Fe and competitive ion exchange to deposit Pt. This method was proposed in order to try and improve the preparation method reported in literature. The synthesised catalyst did not perform as well as the Pt-Fe/Mordenite reported in literature. A maximum CO conversion of 99 % with 47 % CO2 selectivity at 180 °C, 120 000 ml/(h gcat) and O2/CO ratio of 1 was achieved. DA - 2015 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2015 T1 - Carbon monoxide clean-up of reformate gas by preferential oxidation TI - Carbon monoxide clean-up of reformate gas by preferential oxidation UR - http://hdl.handle.net/11427/20090 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/20090
dc.identifier.vancouvercitationMuziki S. Carbon monoxide clean-up of reformate gas by preferential oxidation. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering, 2015 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/20090en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Chemical Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherChemical Engineeringen_ZA
dc.titleCarbon monoxide clean-up of reformate gas by preferential oxidationen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMSc (Eng)en_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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