Title:
CORDIERITE FILTERS WITH REDUCED PRESSURE DROP
Document Type and Number:
WIPO Patent Application WO2005005794
Kind Code:
A3
Abstract:
A diesel particulate filter comprising a plugged, wall-flow honeycomb filter body composed of cordierite and having a plurality of parallel end-plugged cell channels traversing the body from a frontal inlet end to an outlet end thereof, wherein the filter exhibits a CTE (25-800˚C) of less than 13x10<-7>/˚C, a bulk filter density of less than 0.60 g/cm<3>, a median pore diameter, d50, of less than 25 micrometers, a porosity and pore size distribution that satisfy the relationship Pm<=3.75, WHEREIN Pm is equal to 10.2474{1/[(d50)<2> (%porosity/100)]} + 0.0366183(d90) - 0.00040119(d90)<2> + 0.468815(100/%porosity)<2> + 0.0297715(d50) + 1.61639(d50-d10)/d50, wherein d10, and d90 are pore diameters at 10% and 90% of the pore size distribution on a volumetric basis, and d10 < D50 < D90. A method of making the same is also provided.
More Like This:
Inventors:
MERKEL GREGORY A (US)
TAO TINGHONG (US)
TAO TINGHONG (US)
Application Number:
PCT/US2004/012854
Publication Date:
June 02, 2005
Filing Date:
April 26, 2004
Export Citation:
Assignee:
CORNING INC (US)
MERKEL GREGORY A (US)
TAO TINGHONG (US)
MERKEL GREGORY A (US)
TAO TINGHONG (US)
International Classes:
B01D39/06; B01D39/20; B01D46/00; B01D46/24; C04B35/195; C04B38/00; F01N3/02; F01N; (IPC1-7): B01D39/20; B01D46/00; F01N3/02
Domestic Patent References:
| WO2002041972A1 | 2002-05-30 | |||
| WO2001091882A1 | 2001-12-06 |
Foreign References:
| US20030024219A1 | 2003-02-06 |
Other References:
See also references of EP 1639236A4
Download PDF: