Patent ID: 7052532
Filing Date: 2006-05-30
Classification: B01D,F01N,Y10S

Abstract:
1. A filter comprising a hybrid filter media for filtering nanoparticles in a gas flowing along an axial flow direction and having a gas temperature greater than about 200° C., said hybrid filter media comprising first and second sheets, said second sheet having a plurality of pleats defined by wall segments extending in a zig-zag manner between pleat tips at axially extending bend lines, the pleat tips on one side of said second sheet being in contact with said first sheet to define axial flow channels, at least one sheet of said sheets comprising, in the same sheet, a) fibrous filter media having a plurality of fibers; and b) granular filter media having a plurality of particles extending from surfaces of said fibers, wherein the gas flows through said at least one sheet and said at least one sheet provides depth media filtering of nanoparticles.