PARTICULATE FILTER HAVING PARTIALLY COATED CATALYTIC LAYER
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United States of America Patent
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Issued Date -
Oct 17, 2024
app pub date -
Aug 10, 2022
filing date -
Aug 10, 2022
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Abstract
A catalyzed particulate filter for exhaust gas from an internal combustion engine, comprising: a particulate filter of total length L; a first catalytic layer coated onto the particulate filter, comprising a first composition, wherein the first composition comprising a first support material; and a first platinum group metal and/or a first catalytic active transitional metal; a second catalytic layer coated onto the particulate filter, comprising a second composition, wherein the second composition comprises a second support material; and said first catalytic layer is present on a portion of said particulate filter, and extends from either upstream or downstream end in axial direction of said particulate filter for a length L1, and L1 is in the range from 20 to 90% of L.
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