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Influence of Bed Depth on Specific Liquid - Solid Mass Transfer in a 5 m Trickle Bed Reactor
Dissertation (MEng)--University of Pretoria, 2014.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2015
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| _version_ | 1867613673495724032 |
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| access_status_str | Open Access |
| author2 | Nicol, Willie |
| author_browse | Nicol, Willie |
| author_facet | Nicol, Willie |
| collection | Thesis |
| dc_rights_str_mv | © 2014 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 | Dissertation (MEng)--University of Pretoria, 2014. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/43232 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:39:53.208Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2015 |
| publishDateRange | 2015 |
| publishDateSort | 2015 |
| 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:2263/43232 Influence of Bed Depth on Specific Liquid - Solid Mass Transfer in a 5 m Trickle Bed Reactor Nicol, Willie fsaayman@tuks.co.za Saayman, Francois Liquid-solid contact Electrochemical measurement Wetting efficiency Liquid-solid mass transfer UCTD Dissertation (MEng)--University of Pretoria, 2014. Trickle bed reactors (TBRs) exhibit complex hydrodynamics and this study is aimed at giving insight into whether liquid-solid mass transfer and wetting are influenced by bed depth in a 5 m trickling column using 4 mm glass spheres as random packing. Measurements were made using the novel electrochemical technique developed by Joubert and Nicol (2013). Using this technique the wetting and mass transfer could be measured simultaneously. The study proves that the liquid-solid mass transfer and wetting efficiency do not stabilise at a minimum bed depth. The parameters were found to continue decreasing until the bottom of the bed. For the upper branch of the hydrodynamic envelope, the rate of decrease for the wetting efficiency was slow at the top of the bed and decreased rapidly closer to the bottom. However, only the wetting efficiency decreased significantly as a function of bed length; the liquid-solid mass transfer exhibited only a slight decrease of 14%. This compared well with the results of Du Toit et al. (2014), who found an 11% decrease in the liquid-solid mass transfer in a column with an x/D value of 29,4. The lower branch of the hydrodynamic envelope showed a linear decrease with respect to bed length for both wetting and mass transfer. The liquid-solid mass transfer decreased by 50% from the top of the bed to the bottom. These results are also in agreement with those of Du Toit et al. (2014)1 who found a decrease of 30% for a 1,6 m column. The wetting efficiency for the Levec mode decreased by 52%, whereas Du Toit et al. (2014)2 found a decrease of 20%. lk2014 Chemical Engineering MEng Unrestricted 2015-01-19T12:13:13Z 2015-01-19T12:13:13Z 2014/12/12 2014 Dissertation Saayman, F 2014, Influence of Bed Depth on Specific Liquid - Solid Mass Transfer in a 5 m Trickle Bed Reactor, MEng Dissertation, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/43232> M14/9/460 http://hdl.handle.net/2263/43232 en © 2014 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 | Liquid-solid contact Electrochemical measurement Wetting efficiency Liquid-solid mass transfer UCTD Influence of Bed Depth on Specific Liquid - Solid Mass Transfer in a 5 m Trickle Bed Reactor |
| title | Influence of Bed Depth on Specific Liquid - Solid Mass Transfer in a 5 m Trickle Bed Reactor |
| title_full | Influence of Bed Depth on Specific Liquid - Solid Mass Transfer in a 5 m Trickle Bed Reactor |
| title_fullStr | Influence of Bed Depth on Specific Liquid - Solid Mass Transfer in a 5 m Trickle Bed Reactor |
| title_full_unstemmed | Influence of Bed Depth on Specific Liquid - Solid Mass Transfer in a 5 m Trickle Bed Reactor |
| title_short | Influence of Bed Depth on Specific Liquid - Solid Mass Transfer in a 5 m Trickle Bed Reactor |
| title_sort | influence of bed depth on specific liquid solid mass transfer in a 5 m trickle bed reactor |
| topic | Liquid-solid contact Electrochemical measurement Wetting efficiency Liquid-solid mass transfer UCTD |
| url | http://hdl.handle.net/2263/43232 |