Universal Approach to Estimate Perfluorocarbons Emissions During Individual High-Voltage Anode Effect for Prebaked Cell Technologies
| Autor: | Frédéric Picard, Sándor Poncsák, Lukas Dion, László I. Kiss, Simon Gaboury, Nadia Morais |
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| Rok vydání: | 2018 |
| Předmět: |
Aluminum electrolysis
business.industry General Engineering High voltage 02 engineering and technology 010501 environmental sciences Aluminum industry 01 natural sciences 020501 mining & metallurgy Anode Nonlinear system 0205 materials engineering Smelting Environmental science General Materials Science Anode effect Process engineering business 0105 earth and related environmental sciences |
| Zdroj: | JOM. 70:1887-1892 |
| ISSN: | 1543-1851 1047-4838 |
| Popis: | Recent investigations on aluminum electrolysis cell demonstrated limitations to the commonly used tier-3 slope methodology to estimate perfluorocarbon (PFC) emissions from high-voltage anode effects (HVAEs). These limitations are greater for smelters with a reduced HVAE frequency. A novel approach is proposed to estimate the specific emissions using a tier 2 model resulting from individual HVAE instead of estimating monthly emissions for pot lines with the slope methodology. This approach considers the nonlinear behavior of PFC emissions as a function of the polarized anode effect duration but also integrates the change in behavior attributed to cell productivity. Validation was performed by comparing the new approach and the slope methodology with measurement campaigns from different smelters. The results demonstrate a good agreement between measured and estimated emissions as well as more accurately reflect individual HVAE dynamics occurring over time. Finally, the possible impact of this approach for the aluminum industry is discussed. |
| Databáze: | OpenAIRE |
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