Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Honeycomb structure

A honeycomb structure body and technology of honeycomb structure, applied in the direction of catalyst carrier, catalyst carrier, exhaust gas treatment, etc., can solve the problems of deterioration, inability to suppress purification performance, easy stagnation of exhaust gas flow, etc., to achieve improved purification performance, less stagnation, The effect of abrasion resistance maintenance

Active Publication Date: 2018-10-23
NGK INSULATORS LTD
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, there is a problem that stagnation of the exhaust gas flow is extremely easy, and it is impossible to suppress the deterioration of the purification performance when the flow rate is large.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Honeycomb structure
  • Honeycomb structure
  • Honeycomb structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] In Example 1, first, a molding material for producing a honeycomb structure was prepared. Specifically, a binder, a surfactant, a pore-forming material, and water are added to a ceramic raw material to form a molding raw material. It should be noted that kaolin, talc, and alumina, which are cordierite-forming raw materials, were used as ceramic raw materials.

[0087] Next, the obtained molding raw materials are kneaded with a kneader, and then kneaded with a vacuum mud mill to form a green body. Next, the obtained green body is extruded using a nozzle to produce a honeycomb molded body. The change in the arrangement direction of the nozzle using the shape of the cell including the protrusion is Figure 4 The nozzle shown "the compartment shape of one specific compartment is 4 times symmetric to the compartment shape of other specific compartments adjacent to one specific compartment". After the honeycomb molded body is fired, the thickness of the partition wall is 3...

Embodiment 2～18、 comparative example 1～7

[0122] A honeycomb structure was produced in the same manner as in Example 1, except that the predetermined number of protrusions and the arrangement direction of the shape of cells including the protrusions were changed as shown in Table 1 and Table 3.

[0123] For the honeycomb structures of Examples 2 to 18 and Comparative Examples 1 to 7, the thickness of the partition wall (mm), the porosity (%) of the partition wall, and the cell density (cell / cm 2 ), carry out LA-4 test, erosion test, and evaluation of pressure loss. The results are shown in Tables 1 to 4.

[0124] table 3

[0125]

[0126] Table 4

[0127]

[0128] (result)

[0129]As shown in Table 2 and Table 4, it can be seen that the honeycomb structures of Examples 1 to 18 include specific cells, so that compared with the honeycomb structures of Comparative Examples 1, 3, 5, and 6 that do not have specific cells, The purification performance of the exhaust gas after the catalyst is supported is high.

...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a honeycomb structure which enhances the purification performance during high exhaust flow and maintains the wear resistance in the condition of carrying a catalyst. The honeycomb structure includes a honeycomb structure body having porous partition walls which are disposed in region to define a plurality of cells (2) extending from a first end surface to a second end surface and forming a fluid channel of fluid and a circumferential wall arranged around the partition walls, wherein the partition walls are provided with protrusions (21) which protrude to extend into thecells and are continuously disposed in an extending direction of the cells, the cells have a polygonal shape in a cross section orthogonal to the extending direction of the cells, the plurality of cells include a plurality of specific cells (2a) having at least one place where two sides each of which is provided with a different number of protrusions intersect each other, and in the cross sectionorthogonal to the extending direction of the cells, disposition directions of the shapes of the cells including the protrusions in the specific cells are different in one specific cell and other specific cells other than the one specific cell.

Description

technical field [0001] The present invention relates to a honeycomb structure. More specifically, it relates to a honeycomb structure in which purification performance is improved when the flow rate of exhaust gas is large (high flow rate), and wear resistance is maintained. Background technique [0002] In recent years, awareness of environmental issues has increased throughout society. Therefore, in the technical field of generating power by burning fuel, various technologies for removing harmful components such as nitrogen oxides from exhaust gas generated during fuel combustion are being developed. Furthermore, as various technologies for removing harmful components, for example, various technologies for removing harmful components such as nitrogen oxides from exhaust gas emitted from automobile engines are being developed. When removing harmful components in the exhaust gas in this way, a catalyst is usually used to chemically react the harmful components to change th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/94B01D53/56B01J32/00
CPCB01D53/9431B01D46/247B01D46/2486B01D46/2474B01D46/2476F01N3/10F01N2260/06F01N2260/14F01N2330/06F01N2510/06C04B35/195C04B38/0006C04B35/185C04B35/478C04B35/565C04B2235/663F01N3/2828F01N2330/34F01N2330/38C04B35/80B01J35/56C04B35/515C04B38/0009
Inventor 青木洋一
Owner NGK INSULATORS LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com