DESULFATION CONTROL STRATEGY

摘要

The inventors' concept relates to controlling a power generation system (100) having an exhaust aftertreatment system comprising a fuel reformer (104) and an LNT (105) in series. Over the course of a desulfation, a fuel injection upstream of the fuel reformer (104) is pulsed to create alternating lean and rich phases and control the LNT (105) temperature. The LNT (105) temperature is controlled by manipulating a minimum temperature for the fuel reformer (104) at the end of the lean phase, a length of the lean phase, or a pulse frequency. Preferably, the rich phases end when the fuel reformer (104) reaches a predetermined maximum temperature. The method is effective in regulating the fuel reformer (104) temperature while accurately controlling the LNT (105) temperature.