Automobile exhaust gases are conventionally purified with a catalyst supported on a ceramic body able to withstand high temperatures. The preferred catalyst support structure is a honeycomb configuration which includes a multiplicity of unobstructed parallel channels sized to permit gas flow and bounded by thin ceramic walls. The walls of these channels provide the surface for precious-metal catalysts that convert noxious emissions into carbon dioxide, nitrogen and water vapor. We can provide honeycomb ceramic substrate has been coated and non-coated precious-metal.
A. Technical data of petrol vehicle honeycomb ceramic substrate:
Parameters
Unit
standard
typical data
|
Cordierite crystal phase
wt%
≥90
9 4
|
Coefficient of Thermal Expansion (20 -800 °C )
cm/cm/ °C
≤1.8 ×10 -6
≤1.5 ×10 -6
|
Thermal Stability (20 -650 °C )
times
≥1
3
|
Soften Temperature
°C≥1420
1440
|
Compression Strength
Lengthways
MPa
16
16.9
|
Horizontal
MPa
5
6.2
Specific Weight
Kg/L
0.45-0.55
0.45-0.5
|
Porosity
%
40-45
41
|
Water-absorbing rate
%
23-25
23.8
|
B.Specification of catalyst carrier (straight hole)used in petrol engine car:
Rotundity shape
| Ellipse shape
|
Specification (mm )
Number of channels ( holes / square inch )
Specification (mm)
Number of channels ( holes /square inch )
Φ83×85
400
T146.8×77×86.4
400
Φ144×152.4
400
T120.6×80×152.4
400
Φ100×100
400
T169.7×80.7×76.2
400
Φ130×130
400
T144.8×81.3×152.4
400
Φ118×150
400
T144.8×81×76.2
400
Φ103×100
400
T169.7×80.7×101.6
400
Φ150×75
400
T144.8×81.3×100
300
Φ83×125
400
T127×63.5×107
300
Φ150×150
300
T144.8×81.3×70
300
Φ120×100
300
T144.8×81.3×150
300
Φ101.6×100
300
Race track shape
|
Φ94×100
300
P120.65× 80.01×76.2
400
Φ85×70
300
P120.65× 80.01× 76.2
200
Φ93×76
200
P144×68×150
400
Φ118×76
200
P125×80×100
400