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US 8,986,620 B2Granted
System for treating a platinum contaminated catalytic component
AssigneeCummins Inc.
InventorsXu Chen, Krishna Kamasamudram, Neil W. Currier, Aleksey Yezerets
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Abstract
An example method includes determining that a selective catalytic reduction (SCR) component having a zeolite-based catalyst is contaminated with platinum (Pt). The method further includes elevating the temperature of the SCR component to at least 600° C. in response to the determining the catalytic component is contaminated with Pt, and maintaining the elevated temperature of the catalytic component for a predetermined time period thereby restoring reduction activity of the catalyst.
Claims17
A system, comprising:
- an electronic controller comprising:
- a platinum (Pt) contamination module comprising a means for determining that a catalytic component comprising a zeolite-based catalyst is contaminated with Pt;
- a degradation reporting module structured to provide a Pt degradation indicator to an output device;
- a recovery planning module structured to provide a rejuvenation time period and rejuvenation temperature in response to the Pt degradation indicator, wherein the rejuvenation temperature comprises at least 600° C.;
- and
- a catalyst recovery device structured to elevate a temperature of the zeolite-based catalyst to at least the rejuvenation temperature for at least the rejuvenation time period.
3 more elements
A system, comprising:
- a catalytic component in an exhaust system;
- controller structured to receive input associated with operating conditions of the exhaust system and determine the catalytic component is contaminated with Pt in response to the input;
- and
- a catalyst recovery device structured to elevate a temperature of the catalytic component to at least a rejuvenation temperature for at least a rejuvenation time period in response to the catalytic component being contaminated with Pt, wherein the rejuvenation temperature comprises at least 600° C.
1 more element
Dependencies are inferred from the claim text.