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The effect of diabietic acid on the coking of oxidised solvent-extracted coal
Dissertation (MSc (Chemistry))--University of Pretoria, 2008.
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| Format: | Thesis |
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University of Pretoria
2013
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| _version_ | 1867613719205249024 |
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| access_status_str | Open Access |
| author2 | Morgan, D.L. |
| author_browse | Morgan, D.L. |
| author_facet | Morgan, D.L. |
| collection | Thesis |
| dc_rights_str_mv | © University of Pretor |
| description | Dissertation (MSc (Chemistry))--University of Pretoria, 2008. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/23996 |
| institution | University of Pretoria (South Africa) |
| last_indexed | 2026-06-10T12:40:36.899Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2013 |
| publishDateRange | 2013 |
| publishDateSort | 2013 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/23996 The effect of diabietic acid on the coking of oxidised solvent-extracted coal Morgan, D.L. s24476804@tuks.co.za Ludere, Margaret Tshimangadzo Anisotropic coke. Hydrogen-donating additives Coking process Refcoal UCTD Dissertation (MSc (Chemistry))--University of Pretoria, 2008. Refcoal is a refined carbon source obtained by extraction of coal with dimethylformamide (DMF). During the coking process, Refcoal goes through a mesophase (fluid) stage to form an anisotropic coke. In contrast, oxidised Refcoal does not undergo such a mesophase stage during the carbonisation process. Thus it does not yield an anisotropic coke, but forms an isotropic coke. The objective of this study is to produce an anisotropic coke from oxidised Refcoal. For this purpose, diabietic acid, a hydrogen donor, was considered as a suitable additive. Coking was performed in sealed glass capillary tubes as diabietic acid proved to be volatile at the carbonisation temperature of 500 °C. The resultant cokes were analysed using thermogravimetric analysis, Raman spectroscopy and optical microscopy. The results show that the degree of anisotropy increased with diabietic acid content (3, 5 and 10 mass %). Chemistry MSc Unrestricted 2013-09-06T16:19:50Z 2008-04-24 2013-09-06T16:19:50Z 2007-09-06 2008-04-24 2008-04-17 Dissertation Ludere, MT 2008, The effect of diabietic acid on the coking of oxidised solvent-extracted coal, MSc Dissertation, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/23996> http://hdl.handle.net/2263/23996 http://upetd.up.ac.za/thesis/available/etd-04172008-140302/ © University of Pretor application/pdf University of Pretoria |
| spellingShingle | Anisotropic coke. Hydrogen-donating additives Coking process Refcoal UCTD The effect of diabietic acid on the coking of oxidised solvent-extracted coal |
| title | The effect of diabietic acid on the coking of oxidised solvent-extracted coal |
| title_full | The effect of diabietic acid on the coking of oxidised solvent-extracted coal |
| title_fullStr | The effect of diabietic acid on the coking of oxidised solvent-extracted coal |
| title_full_unstemmed | The effect of diabietic acid on the coking of oxidised solvent-extracted coal |
| title_short | The effect of diabietic acid on the coking of oxidised solvent-extracted coal |
| title_sort | effect of diabietic acid on the coking of oxidised solvent extracted coal |
| topic | Anisotropic coke. Hydrogen-donating additives Coking process Refcoal UCTD |
| url | http://hdl.handle.net/2263/23996 http://upetd.up.ac.za/thesis/available/etd-04172008-140302/ |