摘要:
A honeycomb filter of the present invention includes a ceramic honeycomb substrate having a large number of cells placed longitudinally in parallel with one another with a cell wall interposed therebetween, each of the cells passing fluid therethrough and being sealed at either a fluid inlet end or a fluid outlet end of the cell; an auxiliary filter layer formed on a surface of the cell wall of the cell opened at the fluid inlet end and sealed at the fluid outlet end in the surface of the cell wall; and an SCR catalyst supported on a surface of the cell wall of the cell sealed at the fluid inlet end and opened at the fluid outlet end, in the cell wall on which the auxiliary filter layer is formed. The honeycomb filter includes a portion that satisfies a
摘要:
A honeycomb structure body where ash can be easily discharged to the outside and a pressure loss can be kept low. In the honeycomb structure body, cells are arranged side-by-side in the length direction and either of the end sections of a cell is sealed, the porosity of the structure is 70% - 95%, and the ratio of the length in the longitudinal direction of the honeycomb structure body to the diameter in a cross-section orthogonal to the longitudinal direction of the honeycomb structure body is 0.2 - 0.9.
摘要:
A honeycomb filter of the present invention includes a ceramic honeycomb substrate including a porous honeycomb fired body having a large number of cells placed longitudinally in parallel with one another with a cell wall interposed therebetween, each of the cells passing fluid therethrough and being sealed at either a fluid inlet end or a fluid outlet end of the cell; and an auxiliary filter layer including at least two layers, the auxiliary filter layer being formed on a surface of the cell wall of the cell opened at the fluid inlet end and sealed at the fluid outlet end, and on a pore portion in the cell wall. The auxiliary filter layer includes a first layer in which particles having a first average particle diameter are deposited on the surface of said cell wall, and a second layer in which particles having a smaller second average particle diameter than said first average particle diameter are deposited on a surface of said first layer.