Patent ID: 7566426
Filing Date: 2009-07-28
Classification: B01D,F01N,Y02A,Y02C,Y02T

Abstract:
1. A method for cleaning an exhaust stream of an internal combustion engine comprising: directing the exhaust stream into a set of inlet channels of a honeycomb substrate in a wall-flow configuration, the inlet channels of the honeycomb substrate having a porous structure comprising substantially fibrous non-woven porous walls comprising tangled ceramic fibers having interconnecting bonds; trapping particulates in the inlet channel using the porous structure while directing the exhaust gas through the porous structure; reacting the exhaust gas with at least one reactive reagent to convert it into a different species using pore diffusion within the porous structure; receiving the exhaust gas into an outlet channel of the honeycomb substrate, the outlet channel being adjacent to an inlet channel and separated by the porous structure; and directing the exhaust stream into the atmosphere from the outlet channel.