Patent ID: 8591622
Filing Date: 2013-11-26
Classification: B01D,B33Y

Abstract:
1. A filter apparatus comprising: a housing including a first fluid port and a second fluid port; a filter stack mounted within the housing and configured to filter a fluid stream between the fluid ports with the filter stack defining a central flow path in fluid communication with the first fluid port, wherein the filter apparatus includes an outer peripheral flow path in fluid communication with the second fluid port and defined between the filter stack and the housing; the filter stack including a plurality of porous ceramic plates axially spaced from one another in an axial direction of the filter apparatus by a plurality of spacers to define a plurality of axially spaced apart radial flow areas, each porous ceramic plate including a thickness extending between a first side and a second side of the porous ceramic plate, and each porous ceramic plate further including a central aperture extending through the thickness of the plate, the central apertures of the porous ceramic plates positioned along the central flow path, wherein the thickness of the plate is further provided along a radial direction of the plate from the central aperture to an outer peripheral edge of the plate; wherein the plurality of axially spaced apart radial flow areas alternate in the axial direction along the central flow path between a first set of radial flow areas open to the central flow path and closed to the outer peripheral flow path, and a second set of radial flow areas closed to the central flow path and open to the outer peripheral flow path; and wherein the plurality of porous ceramic plates each include a filter profile defined between the first side and the second side of the porous ceramic plate that is selected from the group consisting of i) ceramic material composition, ii) porosity, iii) median pore diameter, iv) plate layering, v) catalyst loading, vi) the plate thickness being provided as a substantially constant plate thickness along the radial direction of the plate, vii) size of the central aperture, and viii) plate surface topography; and wherein at least two of the plurality of porous ceramic plates have substantially different filter profiles.