| US 7,614,214 B2 | ||
| Gasification of soot trapped in a particulate filter under reducing conditions | ||
| Jiyang Yan, Troy, Mich. (US) | ||
| Assigned to Eaton Corporation, Cleveland, Ohio (US) | ||
| Filed on Jul. 26, 2006, as Appl. No. 11/493,120. | ||
| Prior Publication US 2008/0022662 A1, Jan. 31, 2008 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. F01N 3/00 (2006.01) | ||
| U.S. Cl. 60—286 [60/274; 60/285; 60/295; 60/297; 60/301; 48/197 R] | 9 Claims |
| 1. 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 NOx and SOx 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.
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