US 11,898,475 B2
Increasing and measuring filtration efficiency of a honeycomb body
Pavel Boyuk, Almond, NY (US); Joseph Henry Citriniti, Corning, NY (US); Stefan Wolfgang Kramel, Regensburg (DE); and Cai Liu, Suzhou (CN)
Assigned to Corning Incorporated, Corning, NY (US)
Appl. No. 17/925,677
Filed by CORNING INCORPORATED, Corning, NY (US)
PCT Filed Jul. 8, 2020, PCT No. PCT/CN2020/100782
§ 371(c)(1), (2) Date Nov. 16, 2022,
PCT Pub. No. WO2022/006768, PCT Pub. Date Jan. 13, 2022.
Prior Publication US 2023/0160329 A1, May 25, 2023
Int. Cl. F01N 11/00 (2006.01); F01N 3/022 (2006.01)
CPC F01N 11/00 (2013.01) [F01N 3/0222 (2013.01); F01N 2550/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of increasing a filtration efficiency of a porous honeycomb filter comprised of a plugged honeycomb body comprising porous walls, an inlet end and an outlet end, the method comprising:
flowing an inlet flow of inorganic particles into the inlet end of the plugged honeycomb body;
counting an inlet number of a selected portion of the inorganic particles entering the plugged honeycomb body;
counting an exit number of a selected portion of the inorganic particles exiting the plugged honeycomb body in an outlet flow;
wherein inorganic particles which enter the plugged honeycomb body without exiting the plugged honeycomb body are deposited onto and/or into the porous walls of the honeycomb body, thereby increasing a filtration efficiency of the plugged honeycomb body as deposition continues;
determining a filtration efficiency of the plugged honeycomb body with the deposited particles based on the inlet number and the outlet number; and
terminating the flowing of the inlet flow of inorganic particles into the inlet end of the plugged honeycomb body based on the determined filtration efficiency.