Method of reducing NOx and particulates from internal combustion engines
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United States of America Patent
Stats
-
Oct 13, 2009
Grant Date -
Mar 10, 2005
app pub date -
Sep 8, 2003
filing date -
Sep 8, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Oxides of nitrogen are adsorbed onto the surfaces of, and particulates are trapped in, pores of channels (130, 133, 139-151) in a porous, interdigitated ceramic particulate filter (57, 100) that has relative rotation with respect to a gas inlet distributor (76, 101). The distributor has a baffle (85) or ribs (121, 122) that causes constantly flowing engine exhaust (53) to enter the filter channels over a large portion of a revolution of the adsorption bed or the distributor, and causes constantly flowing syngas (54) to thereafter pass through those passages during a small portion of each revolution. Either the inlet gas distributor (101) or the filter bed (57) may be rotated to distribute the gases. Dual, alternately regenerated filters (35, 36) may be used.
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