Division BAT 54 In order to prevent or reduce CO emissions to air from the combustion of gaseous and/or liquid fuels in gas turbines on offshore platforms, BAT is to use one or a combination of the techniques given below.
United Kingdom
| Technique | Description | Applicability | |
|---|---|---|---|
| a. | Combustion optimisation | See descriptions in Section 8.3 | Generally applicable |
| b. | Oxidation catalysts | Not applicable to combustion plants operated < 500 h/yr. Retrofitting existing combustion plants may be constrained by the availability of sufficient space and by weight restrictions | |
Table 32
BAT-associated emission levels (BAT-AELs) for NOX emissions to air from the combustion of gaseous fuels in open-cycle gas turbines on offshore platforms
| These BAT-AELs are based on > 70 % of baseload power available on the day. | |
| This includes single fuel and dual fuel gas turbines. | |
| The higher end of the BAT-AEL range is 250 mg/Nm3 if DLN burners are not applicable. | |
| The lower end of the BAT-AEL range can be achieved with DLN burners. | |
| Type of combustion plant | BAT-AELs (mg/Nm3)f1 |
|---|---|
| Average over the sampling period | |
| New gas turbine combusting gaseous fuelsf2 | 15–50f3 |
| Existing gas turbine combusting gaseous fuels | < 50–350f4 |
As an indication, the average CO emission levels over the sampling period will generally be:
-
< 100 mg/Nm3 for existing gas turbines combusting gaseous fuels on offshore platforms operated ≥ 1 500 h/yr,
-
< 75 mg/Nm3 for new gas turbines combusting gaseous fuels on offshore platforms.
Annotations
Footnotes
- f1
-
These BAT-AELs are based on > 70 % of baseload power available on the day.
- f2
-
This includes single fuel and dual fuel gas turbines.
- f3
-
The higher end of the BAT-AEL range is 250 mg/Nm3 if DLN burners are not applicable.
- f4
-
The lower end of the BAT-AEL range can be achieved with DLN burners.