Hydrogen oxidation catalysts for hydrogen-internal combustion engine systems
AssigneeBASF Mobile Emissions Catalysts LLC
InventorsYuejin Li, Olga Gerlach, Andreas Sundermann
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Abstract
An emission treatment system comprising a hydrogen oxidation catalyst, the use of the catalyst for oxidizing hydrogen gas in an emission treatment system, and a method for heat generation in an engine exhaust system. The hydrogen oxidation catalyst is capable of increasing the downstream temperature to allow for a system providing enhanced NOx removal and decreased N2O emissions relative to comparable exhaust gas treatment systems.
Claims10
An emission treatment system for a combustion engine, comprising a hydrogen injector positioned upstream of a hydrogen oxidation catalyst at a temperature ranging from about 100° C. to about 250° C. and an NO oxidation catalyst, wherein the hydrogen oxidation catalyst and the NO oxidation catalyst are combined, and wherein the hydrogen oxidation catalyst comprises a platinum group metal supported on a zeolite;
- wherein the hydrogen oxidation catalyst is positioned upstream of one or more of a NO oxidation catalyst, a selective catalytic reduction (SCR) catalyst, an ammonia oxidation (AMOX) catalyst, or any combination thereof;
- wherein an N2O formation of the emission treatment system is <30 ppm;
- and
- wherein the H2 conversion of the hydrogen oxidation catalyst is in a range of 80-100%.
A method for heat generation in an engine exhaust system, the engine exhaust system comprising an emission treatment system, the method comprising injecting hydrogen gas into an emission treatment system comprising a hydrogen injector positioned upstream of a hydrogen oxidation catalyst at a temperature ranging from about 100° C. to about 250° C., allowing the hydrogen oxidation catalyst to oxidize the hydrogen gas, and raising the temperature of the engine exhaust system downstream of the hydrogen oxidation system,
- wherein the hydrogen oxidation catalyst comprises a platinum group metal supported on a zeolite,
- wherein the hydrogen oxidation catalyst is positioned upstream of one or more of a NO oxidation catalyst, a selective catalytic reduction (SCR) catalyst, an ammonia oxidation (AMOX) catalyst, or any combination thereof, and
- wherein an N2O formation of the emission treatment system is <30 ppm.
A use of a hydrogen oxidation catalyst for oxidizing hydrogen gas in an emission treatment system comprising a hydrogen injector positioned upstream of the hydrogen oxidation catalyst at a temperature ranging from about 100° C. to about 250° C., wherein the hydrogen oxidation catalyst is positioned upstream of one or more of a NO oxidation catalyst, a selective catalytic reduction (SCR) catalyst, an ammonia oxidation (AMOX) catalyst, or any combination thereof;
- wherein an N2O formation of the emission treatment system is <30 ppm, wherein the hydrogen oxidation catalyst comprises a platinum group metal supported on a zeolite;
- and
- wherein the H2 conversion of the hydrogen oxidation catalyst is in a range of 80-100%.
Dependencies are inferred from the claim text.