Exhaust gas purification filter
AssigneeDenso Corporation
InventorsKazuhiko KOIKE, Keisuke MIZUTANI, Kana ASAOKU
Life of this patent
Estimating the term…
Abstract
An exhaust gas purification filter comprises a base material part, a catalyst layer, and sealing parts. The base material part comprises porous partition walls. The catalyst layer is supported on pore walls of the partition walls. The partition walls supporting the catalyst layer comprise 10% or less of pores having a pore diameter of 50 μm or more. In the pore diameter distribution in the partition walls supporting the catalyst layer, the pore diameter D50 at which the cumulative pore volume becomes 50% is 10 μm or more. The pore diameter D50, and the pore diameter D10 at which the cumulative pore volume becomes 10%, satisfy the relationship of the following Expression 1. (D50−D10)/D50≤0.9 Expression 1
Claims4
An exhaust gas purification filter comprising:
- a base material part having a honeycomb-structure, the base material part comprising porous partition walls and a plurality of cells which are partitioned by the partition walls and form an exhaust gas flow path,
- a catalyst layer supported on pore walls in the partition walls of the base material part, and
- sealing parts which seal the ends of the cells alternately at an exhaust gas inflow end face or at an outflow end face:
- wherein:
- the partition walls supporting the catalyst layer contain 10% or less of pores having a pore diameter of 50 μm or more and 5 to 15% of pores having a pore diameter of 0.1 μm to 5 μm, and
- in the pore distribution in the partition walls supporting the catalyst layer, the pore diameter D50 at which the cumulative pore volume becomes 50% is 10 μm or more, and the pore diameter D50 and the pore diameter D10 at which the cumulative pore volume becomes 10% satisfy the relationship of Expression I below.
- (D50−D10)/D50≤0.9 Expression I
Dependencies are inferred from the claim text.