Systems, methods, and apparatus for regenerating a catalytic material

摘要

A steam generator coupled in flow communication downstream from a combustion device that produces a flow of exhaust gases includes a heating device configured to heat the exhaust gases that include oxides of nitrogen (NOx), and an oxidation catalyst coupled downstream from the heating device. The oxidation catalyst facilitates reducing an amount of NOx in the exhaust gases channeled into the oxidation catalyst at a first temperature that is less than a thermal regeneration temperature for a catalytic material and at a second temperature that is approximately equal to at least the thermal regeneration temperature such that the catalytic material is simultaneously regenerated.

主权项

1. A method for reducing emissions in a flow of exhaust gases generated by a gas turbine engine, the flow of exhaust gases including oxides of nitrogen (NOx), said method comprising:
operating an oxidation catalyst at a first temperature to facilitate reducing an amount of NOx in the exhaust gases channeled into the oxidation catalyst by oxidizing the NOx to higher order NxOy gases, wherein the first temperature is less than a thermal regeneration temperature for a catalytic material; measuring an efficiency of the oxidation catalyst at the first temperature; comparing the efficiency of the oxidation catalyst to a threshold value; based on the comparison, selectively activating a heating device including at least one of a duct burner and a steam-based heating element to increase a temperature of the exhaust gases to a second temperature to facilitate regenerating the catalytic material; and contacting the exhaust gases with an aqueous solution configured to remove the higher order NxOy gases from exhaust gases.