Sulfur Resistance of Zero-PGM for Diesel Oxidation Application
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United States of America Patent
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Issued Date -
May 5, 2016
app pub date -
Oct 29, 2014
filing date -
Oct 29, 2014
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Abstract
Sulfur tolerant oxidation catalysts with significant oxidation capabilities are disclosed. A plurality of catalyst samples may be prepared including ZPGM material compositions of YMnO3 perovskite, CuxMn3-xO4 spinel, and a combination of both, supported on doped Zirconia and cordierite substrate, and front zoned with sulfur getters of Pd, Ba acetate, and Ce nitrate. Testing of samples may be performed under standard and sulfated DOC conditions to assess influence of adding front zoned sulfur getters to ZPGM catalyst samples. Levels of NO oxidation and HC conversion may be compared, and resistance to sulfur and catalytic stability may be observed to determine ZPGM samples zoned with sulfur getter which may provide the most significant improvements in NO oxidation, HC conversion, CO selectivity, and resistance to sulfur for use in DOC applications.
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