Systems and methods for recovering catalyst performance
AssigneeCummins Emission Solutions Inc.
InventorChristopher John Keturakis
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Abstract
A method of recovering catalyst performance includes providing a vanadium selective catalytic reduction (VSCR) catalyst. The method includes exposing the VSCR catalyst to a first humidity level in a range of 50%-100% relative humidity, at a first temperature in a range of 20° C.-100° C., for a first period of time of at least two hours. The method includes thermally treating the VSCR catalyst at a second temperature in a range of 300° C.-600° C. for a second period of time of at least than one hour.
Claims20
A method of recovering catalyst performance, comprising:
- providing a vanadium selective catalytic reduction (VSCR) catalyst;
- exposing the VSCR catalyst to a first humidity level in a range of 50%-100% relative humidity, at a first temperature in a range of 20° C.-100° C., for a first period of time of at least two hours;
- and
- thermally treating the VSCR catalyst at a second temperature in a range of 300° C.-600° C. for a second period of time of at least one hour.
A method of manufacturing vanadium selective catalytic reduction (VSCR) catalyst, comprising:
- sintering vanadium oxide;
- exposing the vanadium oxide to a first humidity level in a range of 50%-100% relative humidity, at a first temperature in a range of 20° C.-100° C., for a first period of time of at least two hours;
- and
- thermally treating the vanadium oxide at a second temperature in a range of 300° C.-600° C. for a second period of time of at least one hour.
Dependencies are inferred from the claim text.