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Monitering van die emissies van vonkontstekingsenjins onder verskillende rykondisies en met verskillende brandstofformulerings
Tesis (M. Sc) -- Universiteit van Stellenbosch, 1997.
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| Other Authors: | |
| Format: | Thesis |
| Language: | Afrikaans |
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Stellenbosch : Stellenbosch University
2012
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| _version_ | 1867613737010069506 |
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| access_status_str | Open Access |
| author | De Goede, Stefan |
| author2 | Engelbrecht, W. J. |
| author_browse | De Goede, Stefan Engelbrecht, W. J. |
| author_facet | Engelbrecht, W. J. De Goede, Stefan |
| author_sort | De Goede, Stefan |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Tesis (M. Sc) -- Universiteit van Stellenbosch, 1997. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/55590 |
| institution | Stellenbosch University (South Africa) |
| language | Afrikaans |
| last_indexed | 2026-06-10T12:40:53.839Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2012 |
| publishDateRange | 2012 |
| publishDateSort | 2012 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/55590 Monitering van die emissies van vonkontstekingsenjins onder verskillende rykondisies en met verskillende brandstofformulerings De Goede, Stefan Engelbrecht, W. J. Van der Merwe, S. W. J. Stellenbosch University. Faculty of Science. Dept. of Chemistry & Polymer Science. Automobiles -- Motors -- Exhaust gas -- Measurement Aldehydes -- Health aspects Aldehydes -- Environmental aspects Combustion gases -- Environmental aspects Automobiles -- Fuel systems -- Health aspects -- South Africa Air -- Pollution -- South Africa Benzene -- Health aspects Benzene -- Environmental aspects Internal combustion engines -- Combustion Fuel -- South Africa Combustion gases -- Health aspects Dissertations -- Chemistry Tesis (M. Sc) -- Universiteit van Stellenbosch, 1997. Motor vehicles contribute significantly to atmospheric pollution. Some species in automobile emissions, like unburned hydrocarbons, nitrogen oxide emissions, carbon monoxide and carbon dioxide are well known for their negative effect on atmospheric pollution. It was only realised recently that aldehydes and benzene in exhaust emissions present a significant danger. Aldehydes are responsible for certain respiratory illnesses, as well as eye irritations. Some aldehydes are even suspected carcinogens. Most aldehydes are reactive and can contribute to photochemical smog. During this study standard and modified internal combustion engines were used to study regulated and non regulated emissions from different fuel blends. The engines were chosen to be representative of the engine technology currently making up the South African vehicle fleet, therefore engines without catalytic converters and feedback control were utilised. The regulated emissions were determined by a bank of gas analysers, while aldehydes were trapped in cartridges containing acidified 2.4-dinitrophenylnydrazine. After sampling of the aldehydes. extraction was done with acetonitrile, and quantification was achieved by means of HPLC, equipped with a diode array detector. The analytical apparatus was calibrated by injecting known amounts of 2.4-dinitrophenylhydrazine derivatives of a range of aldehydes. The effect of engine settings on the regulated and the non regulated emissions was first studied. An increase in the fuel/ air equivalence ratio was responsible for an increase in the unburned hydrocarbon emissions, a decrease in the oxygen content of the exhaust gas and a decrease in the nitrogen oxide emissions It was also responsible for an increase in the carbon monoxide emissions. Some of the aldehydes showed a very significant decrease with the increase in the fuel/ air equivalence ratio. A retardation in the ignition timing was responsible for an increase in the unburned hydrocarbon emissions and the nitrogen oxide emissions. The carbon monoxide and the aldehyde emissions showed small variations. Masters 2012-08-27T11:37:08Z 2012-08-27T11:37:08Z 1997 Thesis http://hdl.handle.net/10019.1/55590 af Stellenbosch University 164 pages : ill. application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Automobiles -- Motors -- Exhaust gas -- Measurement Aldehydes -- Health aspects Aldehydes -- Environmental aspects Combustion gases -- Environmental aspects Automobiles -- Fuel systems -- Health aspects -- South Africa Air -- Pollution -- South Africa Benzene -- Health aspects Benzene -- Environmental aspects Internal combustion engines -- Combustion Fuel -- South Africa Combustion gases -- Health aspects Dissertations -- Chemistry De Goede, Stefan Monitering van die emissies van vonkontstekingsenjins onder verskillende rykondisies en met verskillende brandstofformulerings |
| title | Monitering van die emissies van vonkontstekingsenjins onder verskillende rykondisies en met verskillende brandstofformulerings |
| title_full | Monitering van die emissies van vonkontstekingsenjins onder verskillende rykondisies en met verskillende brandstofformulerings |
| title_fullStr | Monitering van die emissies van vonkontstekingsenjins onder verskillende rykondisies en met verskillende brandstofformulerings |
| title_full_unstemmed | Monitering van die emissies van vonkontstekingsenjins onder verskillende rykondisies en met verskillende brandstofformulerings |
| title_short | Monitering van die emissies van vonkontstekingsenjins onder verskillende rykondisies en met verskillende brandstofformulerings |
| title_sort | monitering van die emissies van vonkontstekingsenjins onder verskillende rykondisies en met verskillende brandstofformulerings |
| topic | Automobiles -- Motors -- Exhaust gas -- Measurement Aldehydes -- Health aspects Aldehydes -- Environmental aspects Combustion gases -- Environmental aspects Automobiles -- Fuel systems -- Health aspects -- South Africa Air -- Pollution -- South Africa Benzene -- Health aspects Benzene -- Environmental aspects Internal combustion engines -- Combustion Fuel -- South Africa Combustion gases -- Health aspects Dissertations -- Chemistry |
| url | http://hdl.handle.net/10019.1/55590 |
| work_keys_str_mv | AT degoedestefan moniteringvandieemissiesvanvonkontstekingsenjinsonderverskillenderykondisiesenmetverskillendebrandstofformulerings |