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The thermal decomposition reactions of Gypsum, Lime and Limestone compounds
Thesis (PhD (Chemistry))--University of Pretoria, 1975.
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University of Pretoria
2021
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| _version_ | 1867613647529836544 |
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| access_status_str | Open Access |
| author2 | Strydom, C.A. (Christiena Adriana) |
| author_browse | Strydom, C.A. (Christiena Adriana) |
| author_facet | Strydom, C.A. (Christiena Adriana) |
| collection | Thesis |
| dc_rights_str_mv | © 2021 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Thesis (PhD (Chemistry))--University of Pretoria, 1975. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/82466 |
| institution | University of Pretoria (South Africa) |
| last_indexed | 2026-06-10T12:39:28.478Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| 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:2263/82466 The thermal decomposition reactions of Gypsum, Lime and Limestone compounds Strydom, C.A. (Christiena Adriana) Hudson-Lamb, Denise Lindy UCTD Thermal decomposition Thesis (PhD (Chemistry))--University of Pretoria, 1975. A thermogravimetric study has been undertaken of the thermal decomposition of naturally-occurring Southern African gypsum, pure calcium sulphate dihydrate, synthetically prepared gypsum as well as naturallyoccurring Southern African lime, limestone and their pure compounds. The decomposition reactions proceed without any evidence of detectable melting and the reaction products are identified by using X-ray diffraction analysis and the mass loss percentages on the thermogravimetric curves. Atmospheres used are air, air/water, nitrogen, CO 2 , CO 2 /air and CO 2/water. Mass loss versus time curves of the decomposition reactions of the compounds are used to obtain the activation energy values at different heating rates and fractions decomposed. The shape of the curve of the activation energy versus fraction decomposed yields important information on the complexity of the reaction. This information together with the kinetic data, is used to select a kinetic equation which gives the best mathematical description of the individual decomposition reactions. The kinetic description of the individual decomposition reactions differs in the different atmospheres. The partial pressures of CO 2 and water vapour, also influence the thermal decomposition of the compounds. Chemistry PhD (Chemistry) Unrestricted 2021-11-02T10:19:33Z 2021-11-02T10:19:33Z 2021 1997 Thesis * http://hdl.handle.net/2263/82466 © 2021 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | UCTD Thermal decomposition The thermal decomposition reactions of Gypsum, Lime and Limestone compounds |
| title | The thermal decomposition reactions of Gypsum, Lime and Limestone compounds |
| title_full | The thermal decomposition reactions of Gypsum, Lime and Limestone compounds |
| title_fullStr | The thermal decomposition reactions of Gypsum, Lime and Limestone compounds |
| title_full_unstemmed | The thermal decomposition reactions of Gypsum, Lime and Limestone compounds |
| title_short | The thermal decomposition reactions of Gypsum, Lime and Limestone compounds |
| title_sort | thermal decomposition reactions of gypsum lime and limestone compounds |
| topic | UCTD Thermal decomposition |
| url | http://hdl.handle.net/2263/82466 |