Combination of Pseudobrookite Oxide and Low Loading of PGM as High Sulfur-Resistant Catalyst for Diesel Oxidation Applications
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United States of America Patent
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Dec 1, 2016
app pub date -
Jun 1, 2015
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Jun 1, 2015
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Abstract
Sulfur-resistant synergized platinum group metals (SPGM) catalysts with significant oxidation capabilities are disclosed. Catalytic layers of SPGM catalyst samples are prepared using conventional synthesis techniques to build a washcoat layer completely or substantially free of PGM material. The SPGM catalyst includes a washcoat layer comprising YMn2O5 (pseudobrookite) and an overcoat layer including a Pt/Pd composition with total PGM loading of at or below 5.0 g/ft3. Resistance to sulfur poisoning and catalytic stability is observed under 5.2 gS/L condition to assess significant improvements in NO oxidation, and HC and CO conversions.
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