Division Table 18 BAT-associated emission levels for NOx emissions to air when applying BAT 57

United Kingdom

The BAT-AEL for NO_x emissions from the units concerned by BAT 57, expressed in mg/Nm³ as a monthly average value, is equal to or less than the weighted average of the NO_x concentrations (expressed in mg/Nm³ as a monthly average) that would be achieved by applying in practice at each of those units techniques that would enable the units concerned to meet the following:

(a)

for catalytic cracking process (regenerator) units: the BAT-AEL range set out in Table 4 (BAT 24);
(b)

for combustion units burning refinery fuels alone or simultaneously with other fuels: the BAT-AEL ranges set out in Tables 9, 10 and 11 (BAT 34).

This BAT-AEL is expressed by the following formula:

\frac{Σ [(flue gas flow rate of the unit concerned) \times ({NO}_{X} concentration that would be achieved for that unit)]}{Σ (flue gas flow rate of all units concerned)}