| abstract |
The present invention is directed to an improved dual phase muffler (2) for the abatement of reduction of sound and emission pollutants such as hydrocarbons, carbon monoxide, and nitrogen oxides. More specifically, the muffler comprises a muffler casing (4,6) , an inner chamber (20) formed in the muffler, and a catalytically coated supported material (22) contained within the inner chamber. The present invention is also directed to a catalytically coated metallic foam catalyst support, which optionally can be pre-coat with a metallic thermal arc sprayed layer. |