Emissions control in stationary rich burn engines

摘要

A catalyst system includes a three-way catalyst (120,220) that receives exhaust gases from an engine (110,210) and an ammonia slip catalyst (130,230) that receives exhaust gases from the three-way catalyst. An air injection component (150,250) is configured between the three-way catalyst and the ammonia slip catalyst. A first sensor determines first exhaust gases data and transmits that data to a controller (180,280), while a second sensor determines second exhaust gases data and transmit that data to a controller. The controller estimates unmeasured exhaust gases data based on the data received from the first and second sensors and determines a setting of a component of the system and/or of the engine based on the unmeasured exhaust gases data.