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US 12,594,515 B2Granted
Particulate filter
AssigneeBASF Mobile Emissions Catalysts LLC
InventorsJia Di Zhang, Teng Shen, Jian Li, Wen Ji Song, Tobias Paul, Martin Kalwei, Edgar Viktor Huennekes, Weiyong Tang
Life of this patent
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Abstract
The present invention provides a method for treating a used particulate filter, comprising: removing particulates from the particulate filter; and introducing simulated ash into inlet channels of the particulate filter after removing the particulates.
Claims15
A method for treating a used particulate filter, comprising:
- removing particulates from the particulate filter;
- and
- introducing simulated ash into inlet channels of the particulate filter after removing the particulates, wherein the simulated ash comprises platinum group metals, the platinum group metal including ruthenium, rhodium, palladium, osmium, iridium, platinum, and/or gold;
- wherein the filter is coated with at least a catalyst composition comprising platinum, palladium, ruthenium, rhodium, osmium, iridium, and/or gold;
- and
- wherein the step of removing particulates includes applying a gas and/or a liquid flow at an outlet end and/or an inlet end of the particulate filter, wherein the gas flow is provided with a pressure of about 2-15 bar and/or with a flow rate of about 100-10000 L/min.
3 more elements
A method for manufacturing a particulate filter, comprising:
- providing a particulate filter having a honeycomb structure;
- introducing simulated ash into inlet channels of the honeycomb structure;
- removing at least part of the simulated ash and/or particulates from the inlet channels of the honeycomb structure;
- and
- introducing simulated ash again into the inlet channels of the honeycomb structure, wherein the simulated ash comprises platinum group metals, the platinum group metal including ruthenium, rhodium, palladium, osmium, iridium, platinum, and/or gold;
- wherein the particulate filter is coated with at least a catalyst composition comprising platinum, palladium, ruthenium, rhodium, osmium, iridium, and/or gold;
- and
- wherein the step of removing particulates includes applying a gas and/or a liquid flow at an outlet end and/or an inlet end of the particulate filter, wherein the gas flow is provided with a pressure of about 2-15 bar and/or with a flow rate of about 100-10000 L/min.
5 more elements
Dependencies are inferred from the claim text.