| 摘要 |
FIELD: process engineering. ^ SUBSTANCE: invention relates to catalytic filters for cleaning diesel engine exhaust gases. Proposed filter comprises inlet and outlet and axial length coated by first catalyst comprising platinum group metals on carrier materials and differs from known designs in that said carrier materials are selected from the group including aluminium oxide, silicon dioxide, titanium dioxide, zirconium dioxide, cerium dioxide and mixes thereof, or mixed oxides. Note here that first catalyst additionally comprises at least one zeolite to accumulate hydrocarbons starting from filter inlet. Note also that section of said filter length is coated by second catalyst that contains no zeolite. Invention covers the method of fabricating said filter wherein both catalyst are applied on said filter as suspension coat. Besides it covers application of said filter for decreasing the content of carbon, hydrocarbon and ash particles in diesel engine exhaust gases. ^ EFFECT: improved conversion of hydrocarbons into carbon oxide. ^ 10 cl, 2 tbl, 3 ex |
