dc.contributor.author | Meirbekova, Rauan | |
dc.contributor.author | Haarberg, Geir Martin | |
dc.contributor.author | Thonstad, Jomar | |
dc.contributor.author | Saevarsdottir, Gudrun | |
dc.date.accessioned | 2018-01-22T12:31:30Z | |
dc.date.available | 2018-01-22T12:31:30Z | |
dc.date.created | 2017-10-19T11:15:09Z | |
dc.date.issued | 2017 | |
dc.identifier.citation | Journal of the Electrochemical Society. 2017, 164 (7), E161-E165. | nb_NO |
dc.identifier.issn | 0013-4651 | |
dc.identifier.uri | http://hdl.handle.net/11250/2478723 | |
dc.description.abstract | Many factors may contribute to loss of current efficiency (CE) in aluminum reduction and one of them is a presence of impurities. In this work, the effect of phosphorus on CE is studied in a laboratory cell at different current densities. Due to a growing trend toward higher amperage in retrofitted industrial cells, a study is performed both at a representative industrial current density (0.8 A/cm2) and at a high current density (1.5 A/cm2). More resolution was obtained at phosphorus levels comparable to typical industrial concentration in aluminum reduction cell (0–220 mg/kg). It is shown that the effect of phosphorus on the CE is more significant at high current density. Trend lines for the whole concentration range btw. 0 and 630 mg/kg showed a decrease of 1.1% in CE per 100 mg/kg for the high current density and 0.67% per 100 mg/kg at the low current density. The detrimental effect was more pronounced for relatively low phosphorus contents up to 220 mg/kg. A trend line for that smaller range revealed a reduction of 2.5% per 100 mg/kg of phosphorus at 1.5 A/cm2, while at 0.8 A/cm2 a reduction of 0.92% per 100 mg/kg of phosphorus was obtained. This indicates that increasing amperage in retrofitted cells may amplify the detrimental effect of impurities on the current efficiency. | nb_NO |
dc.language.iso | eng | nb_NO |
dc.publisher | Electrochemical Society | nb_NO |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no | * |
dc.title | Influence of phosphorus on current efficiency in aluminum electrolysis at different current densities | nb_NO |
dc.type | Journal article | nb_NO |
dc.type | Peer reviewed | nb_NO |
dc.description.version | publishedVersion | nb_NO |
dc.source.pagenumber | E161-E165 | nb_NO |
dc.source.volume | 164 | nb_NO |
dc.source.journal | Journal of the Electrochemical Society | nb_NO |
dc.source.issue | 7 | nb_NO |
dc.identifier.doi | 10.1149/2.0941707jes | |
dc.identifier.cristin | 1505852 | |
dc.description.localcode | This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives 4.0 License (CC BY-NC-ND, http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reuse, distribution, and reproduction in any medium, provided the original work is not changed in any way and is properly cited. | nb_NO |
cristin.unitcode | 194,66,35,0 | |
cristin.unitname | Institutt for materialteknologi | |
cristin.ispublished | true | |
cristin.fulltext | postprint | |
cristin.qualitycode | 2 | |