About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Aluminum Reduction Technology
|
| Presentation Title |
Low and High Voltage PFC Slope Coefficient Monitoring during Pot Start-up |
| Author(s) |
Christine Dubois, Luis H. Espinoza-Nava |
| On-Site Speaker (Planned) |
Luis H. Espinoza-Nava |
| Abstract Scope |
Latest intergovernmental panel on climate change update includes a methodology to estimate perfluorocarbon (PFC) emissions generated during reduction cell start-up. Alcoa has sampled PFC emissions to estimate tier 3 PFC emission slope from aluminum cell operation including cell start-up, for low and high voltage PFC emissions. Results obtained show that cell start-up methodology will impact the PFC emission slope. Thus, some aluminum smelter will have similar PFC emission slope coefficients for cell start-up and older cell in operation, while others will have different PFC emission slope coefficients for start-up and older cell. Low voltage PFC emissions from pot start-up are still under investigation but summary results are presented in this paper. Based on this, Alcoa smelters in Canada have put in place a procedure to analyze and use different slopes or integrate both results into one slope depending on the number of pot started during a given period of time. |
| Proceedings Inclusion? |
Planned: Light Metals |