Sulfur-Resistant Synergized PGM Catalysts for Diesel Oxidation Application
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May 19, 2016
app pub date -
Nov 19, 2014
filing date -
Nov 19, 2014
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Abstract
Sulfur-resistant SPGM catalysts with significant oxidation capabilities are disclosed. A plurality of catalyst samples may be prepared including ZPGM material compositions of YMnO3 perovskite supported on doped Zirconia and cordierite substrate, and front zoned with Pd and Pt/Pd compositions. Incipient wetness and metallizing techniques may be used for the catalytic layers. Testing of samples may be performed under standard and sulfated DOC conditions to assess influence of adding PGM to ZPGM catalyst samples. Levels of NO oxidation and HC oxidation may be compared. Resistance to sulfur and catalytic stability may be observed under long-term sulfated DOC condition to determine SPGM catalyst samples for DOC applications which may provide the most significant improvements in NO oxidation, HC conversion, CO selectivity, and long-term resistance to sulfur.
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