Patent ID: 11867106
Assignee: CUMMINS EMISSION SOLUTIONS INC.
Field: Chemical engineering (Chemistry)
Classification: CPC F  B  Y | IPC B  F

Claim 0:
1. An aftertreatment system for reducing constituents of an exhaust gas having a sulfur content, the aftertreatment system comprising:
an oxidation catalyst;
a filter disposed downstream of the oxidation catalyst; and
a controller configured to, in response to determining that the filter is to be regenerated and a desulfation condition being satisfied:
cause a temperature of the oxidation catalyst to increase to a first regeneration temperature that is greater than or equal to 400 degrees Celsius and less than 550 degrees Celsius,
cause the temperature of the oxidation catalyst to be maintained at the first regeneration temperature for a first time period, and
after the first time period, cause the temperature of the oxidation catalyst to increase to a second regeneration temperature equal to or greater than 550 degrees Celsius,
wherein the desulfation condition being satisfied comprises a measured exotherm of the oxidation catalyst being smaller than the exothermal efficiency curve of a non-sulfated oxidation catalyst.