14
SCR Design Considerations
l
Engine model, power
l
Fuel
l
Exhaust characteristics
–
Flow rate
–
Temperature
–
O
2
, H
2
O concentration
–
Untreated NO
x
emissions
l
Required NO
x
reduction
l
Allowable pressure drop
l
l
Achievable Performance
–
>95% DeNO
x
–
<5 ppm NH
3
slip
–
<0.05 g/bhp-hr outlet NO
x
–
Low pressure drop
–
Wide operating temperature
range