Determination of oxygen gas-liquid mass transfer rates in heap bioleach reactors
| dc.contributor.author | Petersen, J | |
| dc.date.accessioned | 2016-08-16T12:15:25Z | |
| dc.date.available | 2016-08-16T12:15:25Z | |
| dc.date.issued | 2010 | |
| dc.date.updated | 2016-08-16T12:13:41Z | |
| dc.description.abstract | A detailed experimental study is described which was conducted to determine the rate of oxygen gas–liquid mass transfer within the packed bed of heap bioleach reactors at different temperatures (22–68 °C), using the Na2SO3 method. The raw data was analysed using a simplified film mass transfer model, making corrections for oxygen solubility in concentrated solution and for increased water vapour partial pressure at elevated temperatures. The results compared favourably against two independent experimental leach studies, indicating kLa values between 33 and 46 h−1. The value varied with the particle size distribution of the packing, with kLa assuming larger values for those packings that had a higher fines contents. While kLa increases with temperature, the solubility of oxygen decreases simultaneously, resulting in net mass transfer rates being relatively unaffected by temperature in the range studied. This indicates that thermophile heap bioleach reactors are likely to operate under gas–liquid mass transfer limitations, especially at high altitude. | en_ZA |
| dc.identifier | http://dx.doi.org/10.1016/j.mineng.2010.01.006 | |
| dc.identifier.apacitation | Petersen, J. (2010). Determination of oxygen gas-liquid mass transfer rates in heap bioleach reactors. <i> Minerals Engineering</i>, http://hdl.handle.net/11427/21272 | en_ZA |
| dc.identifier.chicagocitation | Petersen, J "Determination of oxygen gas-liquid mass transfer rates in heap bioleach reactors." <i> Minerals Engineering</i> (2010) http://hdl.handle.net/11427/21272 | en_ZA |
| dc.identifier.citation | Petersen, J. (2010). Determination of oxygen gas–liquid mass transfer rates in heap bioleach reactors. Minerals Engineering, 23(6), 504-510. | en_ZA |
| dc.identifier.issn | 0892-6875 | en_ZA |
| dc.identifier.ris | TY - Journal Article AU - Petersen, J AB - A detailed experimental study is described which was conducted to determine the rate of oxygen gas–liquid mass transfer within the packed bed of heap bioleach reactors at different temperatures (22–68 °C), using the Na2SO3 method. The raw data was analysed using a simplified film mass transfer model, making corrections for oxygen solubility in concentrated solution and for increased water vapour partial pressure at elevated temperatures. The results compared favourably against two independent experimental leach studies, indicating kLa values between 33 and 46 h−1. The value varied with the particle size distribution of the packing, with kLa assuming larger values for those packings that had a higher fines contents. While kLa increases with temperature, the solubility of oxygen decreases simultaneously, resulting in net mass transfer rates being relatively unaffected by temperature in the range studied. This indicates that thermophile heap bioleach reactors are likely to operate under gas–liquid mass transfer limitations, especially at high altitude. DA - 2010 DB - OpenUCT DP - University of Cape Town J1 - Minerals Engineering LK - https://open.uct.ac.za PB - University of Cape Town PY - 2010 SM - 0892-6875 T1 - Determination of oxygen gas-liquid mass transfer rates in heap bioleach reactors TI - Determination of oxygen gas-liquid mass transfer rates in heap bioleach reactors UR - http://hdl.handle.net/11427/21272 ER - | en_ZA |
| dc.identifier.uri | http://hdl.handle.net/11427/21272 | |
| dc.identifier.uri | http://www.sciencedirect.com/science/article/pii/S0892687510000075 | |
| dc.identifier.vancouvercitation | Petersen J. Determination of oxygen gas-liquid mass transfer rates in heap bioleach reactors. Minerals Engineering. 2010; http://hdl.handle.net/11427/21272. | en_ZA |
| dc.language | eng | en_ZA |
| dc.publisher | Elsevier | en_ZA |
| dc.publisher.institution | University of Cape Town | |
| dc.source | Minerals Engineering | en_ZA |
| dc.source.uri | http://www.sciencedirect.com/science/journal/08926875 | |
| dc.subject.other | Leaching | |
| dc.subject.other | Heap leaching | |
| dc.subject.other | Bio-leaching | |
| dc.subject.other | Oxygen | |
| dc.subject.other | Gas–liquid mass transfer | |
| dc.title | Determination of oxygen gas-liquid mass transfer rates in heap bioleach reactors | en_ZA |
| dc.type | Journal Article | en_ZA |
| uct.type.filetype | Text | |
| uct.type.filetype | Image | |
| uct.type.publication | Research | en_ZA |
| uct.type.resource | Article | en_ZA |