This study was undertaken to better understand how emission
factors for CF4 and C2F6 vary with reduction technology, what
fraction of the overall PFC emissions is emitted as fugitive
emissions, and how emission rate is affected by cell voltage
during AE. Another objective was to compare the effectiveness of
equations based on cell over-voltage [5] with those based on time
on anode effect for predicting PFC emissions [6,7,8,11]. The
results of measurements at six commercial primary aluminum
production facilities are reported here.
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