Older gas turbines can meet strict, present day emission standards by the addition of such emission reducing technologies as water injection, reduced emission combustion components, CO reduction catalyst and selective catalytic NOx reduction (SCR). The following is a description of a gas turbine peaking plant using SCR and a CO catalyst reduction system to allow 30 year old gas turbines to attain very low levels of NOx and CO emissions. Installation, startup and day-to-day operation are described, as well as operation with anhydrous ammonia.
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