POST THERMAL CONTROL DEVICE FOR USE WITH A NOx SLIP CATALYST
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United States of America Patent
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Issued Date -
Dec 11, 2014
app pub date -
Jan 19, 2012
filing date -
Jan 19, 2012
priority date (Note) -
Abandoned
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Abstract
A system and method for treating diesel exhaust in a diesel exhaust system, and specifically for improved NOx conversion efficiency during particulate filter regeneration, is disclosed. The exhaust gas treatment system includes a diesel oxidation catalyst (DOC); a diesel particulate filter (DPF) fluidly coupled to the DOC; a mixer fluidly coupled to the DOC and DPF, a thermal control device (TCD) positioned after the DPF, a NOx slip catalyst (NSC), at least one temperature sensor (TS), wherein the thermal control device reduces the temperature of the exhaust gas stream. The thermal control device used in conjunction with the NOx slip catalyst provides for improved overall exhaust system NOx conversion efficiency during active DPF regeneration.
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