The use of ruthenium Y zeolite catalysts for the selective methanation of carbon monoxide

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dc.contributor.advisorJack, Calvinen_ZA
dc.contributor.advisorFletcher, Quintinen_ZA
dc.contributor.authorAhmed, Zaheeraen_ZA
dc.date.accessioned2016-06-17T06:29:26Z
dc.date.available2016-06-17T06:29:26Z
dc.date.issued2015en_ZA
dc.description.abstractFuel processing is the conversion of hydrocarbons to produce a mixture of H2 and CO, whereby the H2 will be used in a PEMFC. CO needs to be removed as the tolerance level of the Pt based electro catalyst is only 10 ppm of CO. In order to lower the concentration from 1% post-WGS, to 10 ppm, CO can be converted to CH4 via selective methanation. A selective catalyst primarily methanates CO and inhibits the methanation of CO2 which results in the over consumption of H2. Common catalysts for SMET include Ru/Al2O3 and Ru/Y zeolites. This study involved the use of Ru/Y zeolite catalysts with loadings between 1 wt.%-5.4 wt.% Ru prepared via ion exchange, and a commercial 5 wt.% Ru/Al₂O3. These catalysts were tested in a fixed bed reactor at temperatures between 160°C and 210°C at various space velocities with a feed composition of 1% CO, 20% CO2, 10% H2O, 59% H2 and 10% Ar. The effects of loading, space velocity and reaction temperature on the CO conversion and CO selectivity were investigated. The 2.2 wt.% was found to be the optimum loading by displaying the highest selectivity of 72%, and 100% CO conversion at 170°C. The higher loadings produced large amounts of CH4 displaying lower selectivity, coupled with a high undesirable consumption of H2. The 1 wt.% Ru/Y zeolite showed low activity for SMET but was active for the WGS reaction. The 5 wt.% Ru/Al2O3 displayed the highest selectivity of 60%, and 100% CO conversion at 180°C.en_ZA
dc.identifier.apacitationAhmed, Z. (2015). <i>The use of ruthenium Y zeolite catalysts for the selective methanation of carbon monoxide</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering. Retrieved from http://hdl.handle.net/11427/20032en_ZA
dc.identifier.chicagocitationAhmed, Zaheera. <i>"The use of ruthenium Y zeolite catalysts for the selective methanation of carbon monoxide."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering, 2015. http://hdl.handle.net/11427/20032en_ZA
dc.identifier.citationAhmed, Z. 2015. The use of ruthenium Y zeolite catalysts for the selective methanation of carbon monoxide. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Ahmed, Zaheera AB - Fuel processing is the conversion of hydrocarbons to produce a mixture of H2 and CO, whereby the H2 will be used in a PEMFC. CO needs to be removed as the tolerance level of the Pt based electro catalyst is only 10 ppm of CO. In order to lower the concentration from 1% post-WGS, to 10 ppm, CO can be converted to CH4 via selective methanation. A selective catalyst primarily methanates CO and inhibits the methanation of CO2 which results in the over consumption of H2. Common catalysts for SMET include Ru/Al2O3 and Ru/Y zeolites. This study involved the use of Ru/Y zeolite catalysts with loadings between 1 wt.%-5.4 wt.% Ru prepared via ion exchange, and a commercial 5 wt.% Ru/Al₂O3. These catalysts were tested in a fixed bed reactor at temperatures between 160°C and 210°C at various space velocities with a feed composition of 1% CO, 20% CO2, 10% H2O, 59% H2 and 10% Ar. The effects of loading, space velocity and reaction temperature on the CO conversion and CO selectivity were investigated. The 2.2 wt.% was found to be the optimum loading by displaying the highest selectivity of 72%, and 100% CO conversion at 170°C. The higher loadings produced large amounts of CH4 displaying lower selectivity, coupled with a high undesirable consumption of H2. The 1 wt.% Ru/Y zeolite showed low activity for SMET but was active for the WGS reaction. The 5 wt.% Ru/Al2O3 displayed the highest selectivity of 60%, and 100% CO conversion at 180°C. DA - 2015 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2015 T1 - The use of ruthenium Y zeolite catalysts for the selective methanation of carbon monoxide TI - The use of ruthenium Y zeolite catalysts for the selective methanation of carbon monoxide UR - http://hdl.handle.net/11427/20032 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/20032
dc.identifier.vancouvercitationAhmed Z. The use of ruthenium Y zeolite catalysts for the selective methanation of carbon monoxide. [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/11427/20032en_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.titleThe use of ruthenium Y zeolite catalysts for the selective methanation of carbon monoxideen_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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