We are excited to announce that the repository will soon undergo an upgrade, featuring a new look and feel along with several enhanced features to improve your experience. Please be on the lookout for further updates and announcements regarding the launch date. We appreciate your support and look forward to unveiling the improved platform soon.
dc.contributor.author | Jansen, Arnold Alexander![]() |
|
dc.contributor.author | Gama, Jabulani Selby![]() |
|
dc.contributor.author | Van der Walt, Izak Jacobus![]() |
|
dc.contributor.author | Crouse, Philippus L.![]() |
|
dc.date.accessioned | 2024-07-03T04:25:36Z | |
dc.date.available | 2024-07-03T04:25:36Z | |
dc.date.issued | 2024-08 | |
dc.description.abstract | The thermal behaviour of waste tractor tyre tread was investigated using 5-, 10-, 15- and 20 mm cubes and video recording of the process – an experimental approach for which no precedent could be found in the literature. Pyrolysis and gasification under CO2 flow in the range of 400 °C to 1000 °C were studied using a pre-heated tube furnace under near-isothermal reaction conditions. The video-graphic timeline and thermal history observations were used to correlate the results with first-order heat-transfer calculations and TGA-derived kinetics published previously. For pyrolysis, heat-transfer becomes the rate limiting step in the region 800–900 °C and above. Experimental evidence shows that the full pyrolysis time may be estimated from the algebraic sum of the local kinetic component and a heat-transfer component. The pressure build-up due to the release of gaseous products results in shattering of the solid into sub-millimetre char fragments. The kinetics of the reverse-Boudouard reaction can be described by a standard gas–solid shrinking particle model; however the character of the charred remains complicates this. Mass transfer limits are predicted only to become significant above 1200 °C, for a well-characterised char surface. | en_US |
dc.description.department | Chemical Engineering | en_US |
dc.description.librarian | hj2024 | en_US |
dc.description.sdg | None | en_US |
dc.description.sponsorship | The University of Pretoria and Suid-Afrikaanse Akademie vir Wetenskap en Kuns. | en_US |
dc.description.uri | https://pubs.rsc.org/en/journals/journal/re | en_US |
dc.identifier.citation | Jansen, A.A., Gama, J.S., Van der Walt, I.J. & Crouse, P.L. 2024, 'Pyrolysis and gasification of 5-20 mm tyre rubber cubes under carbon dioxide flow', Reaction Chemistry and Engineering, vol. 2024, no. 9, pp. 2180-2196, doi : 10.1039/d3re00577a. | en_US |
dc.identifier.issn | 2058-9883 (online) | |
dc.identifier.other | 10.1039/d3re00577a | |
dc.identifier.uri | http://hdl.handle.net/2263/96769 | |
dc.language.iso | en | en_US |
dc.publisher | Royal Society of Chemistry | en_US |
dc.rights | © The Royal Society of Chemistry 2024. This article is licensed under aCreative Commons Attribution-NonCommercial 3.0 Unported Licence. | en_US |
dc.subject | Pyrolysis | en_US |
dc.subject | Gasification | en_US |
dc.subject | Tyre rubber cubes | en_US |
dc.subject | Waste tractor tyre tread | en_US |
dc.subject | Carbon dioxide flow | en_US |
dc.title | Pyrolysis and gasification of 5–20 mm tyre rubber cubes under carbon dioxide flow | en_US |
dc.type | Article | en_US |