Patent ID: 7614214

Claim:
A method of operating a power generation system, comprising: operating a diesel engine to produce power and exhaust; passing the exhaust through a particulate filter to trap soot from the exhaust; passing the exhaust through a LNT, whereby the LNT adsorbs and stores NO x and SO x from the exhaust; from time-to-time initiating a rich phase in which a fuel reformer is used to produce reformate that is provided to the exhaust upstream of the DPF, whereby the DPF receives a rich exhaust mixture containing reformate; in the rich phase, catalyzing at temperatures of 400° C. or less soot gasification reactions selected from the group consisting of hydrogen-methanation, steam gasification, and the reverse-Boudouard reaction, by which soot is removed from the DPF and the DPF produces a rich DPF exhaust; and passing the rich DPF exhaust through the LNT, whereby the LNT is regenerated.