The effect of sulphur in fuel on the performance of automotive catalysts

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dc.contributor.advisorDutkiewicz, Ryszard Karolen_ZA
dc.contributor.authorSiemelink, Johannes Jacobusen_ZA
dc.date.accessioned2016-08-24T12:50:46Z
dc.date.available2016-08-24T12:50:46Z
dc.date.issued1994en_ZA
dc.description.abstractCatalysts have been used on cars since 1974 to reduce tailpipe emission levels of carbon monoxide, hydrocarbons and oxides of nitrogen. Initially, oxidation catalysts were used that operated under very lean air/fuel conditions and gave rise to increased sulphate particulate emissions. These sulphate emissions could fortunately be reduced by better air/fuel control. However, the introduction of more active catalyst compositions, in particular the use of cerium oxide components on the wash coat, led to bad odour complaints from motorists. In the report it is shown that under fuel-lean conditions, sulphur, originating from the fuel, is stored as aluminium and cerium sulphates onto the washcoat. Upon a rapid change to fuel-rich engine operation the stored sulphates are released as hydrogen sulphide and is the cause for the smell observed. The sulphur storage/release process results in hydrogen sulphide emissions many times higher than is possible from steady-state conversion from the fuel sulphur level. By using a catalyst/engine combination on a testbed the experiments have shown that the hydrogen sulphide release is a kinetically limited reaction and, apart from the air/fuel control, depends mainly on the catalyst temperature.en_ZA
dc.identifier.apacitationSiemelink, J. J. (1994). <i>The effect of sulphur in fuel on the performance of automotive catalysts</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Energy Research Centre. Retrieved from http://hdl.handle.net/11427/21486en_ZA
dc.identifier.chicagocitationSiemelink, Johannes Jacobus. <i>"The effect of sulphur in fuel on the performance of automotive catalysts."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Energy Research Centre, 1994. http://hdl.handle.net/11427/21486en_ZA
dc.identifier.citationSiemelink, J. 1994. The effect of sulphur in fuel on the performance of automotive catalysts. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Siemelink, Johannes Jacobus AB - Catalysts have been used on cars since 1974 to reduce tailpipe emission levels of carbon monoxide, hydrocarbons and oxides of nitrogen. Initially, oxidation catalysts were used that operated under very lean air/fuel conditions and gave rise to increased sulphate particulate emissions. These sulphate emissions could fortunately be reduced by better air/fuel control. However, the introduction of more active catalyst compositions, in particular the use of cerium oxide components on the wash coat, led to bad odour complaints from motorists. In the report it is shown that under fuel-lean conditions, sulphur, originating from the fuel, is stored as aluminium and cerium sulphates onto the washcoat. Upon a rapid change to fuel-rich engine operation the stored sulphates are released as hydrogen sulphide and is the cause for the smell observed. The sulphur storage/release process results in hydrogen sulphide emissions many times higher than is possible from steady-state conversion from the fuel sulphur level. By using a catalyst/engine combination on a testbed the experiments have shown that the hydrogen sulphide release is a kinetically limited reaction and, apart from the air/fuel control, depends mainly on the catalyst temperature. DA - 1994 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1994 T1 - The effect of sulphur in fuel on the performance of automotive catalysts TI - The effect of sulphur in fuel on the performance of automotive catalysts UR - http://hdl.handle.net/11427/21486 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/21486
dc.identifier.vancouvercitationSiemelink JJ. The effect of sulphur in fuel on the performance of automotive catalysts. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Energy Research Centre, 1994 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/21486en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentEnergy Research Centreen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherMechanical Engineeringen_ZA
dc.subject.otherEnergy Researchen_ZA
dc.subject.otherApplied Scienceen_ZA
dc.titleThe effect of sulphur in fuel on the performance of automotive catalystsen_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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