| 发明名称 |
Thin-walled porous ceramic wall-flow filter |
| 摘要 |
A thin-walled porous ceramic wall-flow filter is disclosed. The filter produces a relatively lower pressure drop coupled with relatively high initial filtration efficiency (FE0), and may enable packaging the filter in a smaller volume. The filter includes a plurality of porous ceramic walls forming cell channels. At least some of the cells are plugged forcing some exhaust gases through the walls, thereby filtering out entrained particulates. The walls have a wall thickness (Twall) wherein 102 μm≦Twall<279 μm, and a median pore diameter (MPD), and wherein 10<Twall/MPD, and may also be <40. The relatively small median pore diameter (MPD) in comparison to the wall thickness (Twall) allows the use of thinner ceramic walls that provide less flow resistance than thicker walls while maintaining sufficient initial filtration efficiency (FE0). Furthermore, such thin-walled filter structure coupled with unequal inlet/outlet area ratio (Ai/Ao) may allow filter lengths to be additionally shortened. |
| 申请公布号 |
US8814974(B2) |
申请公布日期 |
2014.08.26 |
| 申请号 |
US200711895312 |
申请日期 |
2007.08.24 |
| 申请人 |
Corning Incorporated |
发明人 |
Beall Douglas Munroe;Heibel Achim Karl-Erich;Tandon Pushkar |
| 分类号 |
B01D39/20;B01D39/14;B01D39/06;B01D24/00;B01D50/00;B01J23/00;B01J23/10 |
主分类号 |
B01D39/20 |
| 代理机构 |
|
代理人 |
McNutt Matthew B. |
| 主权项 |
1. A ceramic wall-flow filter, comprising:
a plurality of porous ceramic walls forming cell channels, at least some of the cell channels including plugs, wherein the porous ceramic walls exhibit
102 μm≦Twall<279 μm, and 15<WP<42 wherein WP is a ratio defined as WP=Twall/MPD, MPD is a median pore diameter of a porosity in the walls in μm, and Twall is a wall thickness of the walls in μm; wherein the ceramic wall-flow filter employs asymmetric cell technology (ACT); and wherein the configuration (cell density (cpsi)/wall thickness (mils)) of the ceramic wall-flow filter is selected from the group consisting of: 200/9 ACT, 270/10 ACT, 270/15 ACT, 300/8 ACT, 300/10 ACT, 300/12 ACT, and 100/10 ACT. |
| 地址 |
Corning NY US |
