Gas Turbine Handbook : Principles and Practices

Gas Turbine Exhaust Treatment 135
In addition to low NO x
combustor designs, the methods currently
in use to reduce emissions are water injection and steam injection
into the combustor, and a selective catalytic reactor (SCR) in the
turbine exhaust.
Table. 9-3. Residence Time of Atmospheric Trace Elements.
————————————————————————————————
EMISSIONS
LIFE
CO 8
1-3 years
NO 5
1/2 - 1 day
NO
5
2
3-5 days
HC (as CH 4
) 8 1.5 years
SO
5
x
3 - 4 days
P-M 9
hours to days (troposphere)
days to years (stratosphere)
————————————————————————————————
Crude Oils
Distillate Oils
Ethanol (C 2
H 5
OH)
Liquified Natural Gas (LNG)
Liquified Petroleum Gas (LPG)
Methanol (CH 3
OH)
Natural Gas Liquids (NGL)
Residual Oils
0 1 2 3 4
Figure 9-2. Courtesy of Solar Turbines Incorporated. Comparison
to methane of the relative Thermal NO x
produced by various liquid
fuels.