Patent ID: 7980065

Claim:
A method for at least partially regenerating a diesel particulate filter, wherein the diesel particulate filter comprises an inlet, an outlet, and a porous body comprising a plurality of porous walls disposed between the inlet and the outlet, wherein a gas stream flows into the inlet, through the diesel particulate filter, and out of the outlet, and wherein the porous walls contain an amount of carbon soot trapped in or on the porous walls, the method comprising: elevating a temperature of the gas stream flowing into the inlet of the diesel particulate filter to greater than or equal to 450° C. at the inlet of the diesel particulate filter; wherein the gas stream at the inlet of the diesel particulate filter contains an amount of NOx of equal to or greater than 300 ppm, and an amount of O 2 equal to or greater than 5% vol; wherein the temperature of the gas stream flowing into the inlet of the diesel particulate filter is between 450° C. and 550° C. for a first period of time of less than or equal to 15 minutes, wherein the temperature of the gas stream is subsequently elevated to a temperature of greater than or equal to 550° C. for a second period of time, and wherein the amount of NOx is equal to or less than 300 ppm at the inlet of the diesel particulate filter during the second period, thereby burning the soot in the diesel particulate filter.