General Electric Company

Ai Alpine US Bidco Inc.

Maruthi NarasingaRao Devarakonda

Prashant Srinivasan

William Collins Vining

Dipankar Deb

Edward Owen Reinbold

A method for controlling an emission amount in an exhaust gas stream emitted from a power generation system is presented. The method includes determining a pre-catalyst emission level using a combustion engine model. The method further includes determining a post-catalyst emission level using a three-way catalyst model based on the pre-catalyst emission level. Furthermore, the method includes determining an adjusted post-catalyst emission level based on the post-catalyst emission level. Moreover, the method includes determining a difference between the post-catalyst emission level and the adjusted post-catalyst emission level and comparing the difference with a threshold value. Additionally, the method includes determining whether to adjust an actual value of an engine operating parameter based on the comparison such that the emission amount in the exhaust gas stream is maintained below an emission regulatory limit. An engine controller and a power generation system employing the method are also presented.

Engine controller and methods for controlling emission and power generation system using the same

A system for controlling an air/fuel ratio in an engine based on catalyst deactivation includes an NHdetector disposed downstream from the three way catalyst, and a subsystem that compares measured values of NHconcentration with a nominal value of NHconcentration at rich operating conditions. A subsystem adjusts the air/fuel ratio based on the measured value of NHconcentration and estimated CO concentration.

Systems and methods for monitoring catalyst deactivation and controlling an air/fuel ratio

A catalyst system may include a three-way catalyst that may receive exhaust gases from an engine and convert the exhaust gases to first converted exhaust gases. An ammonia slip catalyst may receive the first converted exhaust gases and convert the first converted exhaust gases to second converted exhaust gases. A hydrocarbon oxidation catalyst may receive the second converted exhaust gases and convert the second converted exhaust gases to third converted exhaust gases.

Aftertreatment system for simultaneous emissions control in stationary rich burn engines

A catalyst system may include a three-way catalyst that receives exhaust gases from an engine and an ammonia slip catalyst that receives exhaust gases from the three-way catalyst. An air injection component can be configured between the three-way catalyst and the ammonia slip catalyst. A first sensor can determine first exhaust gases data and transmits that data to a controller, while a second sensor can determine second exhaust gases data and transmit that data to a controller. The controller can estimate unmeasured exhaust gases data based on the data received from the sensors and determine a setting of a component of the system and/or of the engine based on the unmeasured exhaust gases data.

Emissions control in stationary rich burn engines

A method and system for controlling emissions in an engine, includes establishing a desired first temperature at an inlet () of an ammonia slip catalyst assembly (); and determining a second temperature associated with a temperature at the inlet of the ammonia slip catalyst assembly (). If the second temperature is higher than the desired first temperature, then directing an air injector () to add air to the inlet () of the ammonia slip catalyst assembly ().

Systems and methods for controlling emissions in an internal combustion engine through the control of temperature at the inlet of an ammonia slip catalyst assembly

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Waukesha, WI, United States of America

Maruthi NarasingaRao Devarakonda