|
 |
|
 
Oxidation catalysts (Pt, Pd fine particle) dispersed on the metal honeycomb have
large surface area and various features in comparing with catalysts on other structural
support.
|
| • |
High activity because wall surface area of metal honeycomb support is 50% larger than that of other structural supports in the same cell density. |
| • |
Fine precious metal particles exposed on the surface of the
structural honeycomb because washcoat layer is very thin. These particles are
utilized as catalyst effectively. |
| • |
Low-pressure drop caused by low blockage ratio. |
| • |
Available for various size. |
| • |
High resistance for thermal shock and mechanical stress. |
 Catalyst Oxidation of VOC Gases |
|
|
| Comparison features of Various Structural Support as Catalyst |
Support |
Metal Honeycomb |
Ceramics Honeycomb |
Pellet |
Photograph |
|
|
|
Component materials of support |
Fe-Cr-Al |
SiO2-Al2O3-Mgo |
γ-Al2O3 |
Thermal conductivity |
Large |
Small |
Small |
Packed density |
0.4~0.6
|
0.6~0.7
|
0.4~0.8
|
Heat capacity |
Small |
Middle |
Large |
Space Velocity |
30,000~60,000h-1
|
20,000~40,000h-1
|
10,000~30,000h-1
|
Pressure drop(*1) |
5.5 |
7.1 |
41.5 |
Mechanical strength |
Strong |
Weak |
Middle |
Resistance for thermal shock |
Strong |
Weak |
Middle |
|
*1: Pressure drop at 1.0Nm/sec of 200°C air.
|
Removal Efficiency of metal honeycomb catalyst
|
No. |
Legend |
Name of Substance |
Chemical Formula |
Concentration
(ppm) |
Space Velocity
(h-1) |
1 |
|
Hydrogen |
H2 |
1% |
60,000 |
2 |
|
Carbon monoxide |
CO |
1,000 |
60,000 |
3 |
|
Methyl alcohol
(with 7.4% water vapor) |
CH3OH |
100 |
30,000 |
4 |
|
Ethylene |
C2H4 |
5,000 |
60,000 |
5 |
|
Cyclohexanone |
C6H10O |
550 |
60,000 |
6 |
|
Toluene |
C6H5CH3 |
550 |
60,000 |
7 |
|
Methyl Ethyl Ketone |
C2H5COCH3 |
650 |
60,000 |
8 |
|
Dimethyl disulfide
(with 7.4% water vapor) |
(CH3)2s |
10 |
30,000 |
9 |
|
Xylene |
C6H4(CH3)2 |
550 |
60,000 |
10 |
|
Ammonia
(with 7.4% water vapor) |
NH3 |
300 |
30,000 |
11 |
|
Trimethylamine
(with 7.4% water vapor) |
(CH3)3N |
30 |
30,000 |
12 |
|
Acetaldehyde
(with 7.4% water vapor) |
CH3CHO |
140 |
30,000 |
13 |
|
Ethyl alcohol |
C2H5OH |
300 |
30,000 |
14 |
|
Cresol + Phenol |
CH3C6H4OH+C6H5OH |
660+440 |
60,000 |
15 |
|
Triethylamine |
(C2H5)3N |
300 |
30,000 |
16 |
|
Acetic acid
(with 7.4% water vapor) |
CH3COOH |
100 |
30,000 |
17 |
|
Dimethylformamide |
HCON(CH3)2 |
740 |
60,000 |
|
*SV(Space Velocity) = (Flow rate of gas) / (Catalyst Volume) |
| Standard Specification of Metal Honeycomb Catalysts |
|
Order No |
Catalyst size |
Catalyst volume
[mL]
|
Standard volume of
treatment gas
(SV=60,000)
[L/min] |
Cubic shape |
|
| 100×100×L50mm |
| 150×150×L50mm |
| 50×30×L27.5mm |
|
|
|
Cylindrical shape |
| MH50A |
| MH80A |
| MH100A |
| MH150A |
| MH200A |
|
| 50A(φ55.5)×L50mm |
| 80A(φ84.0)×L50mm |
| 100A(φ108.0)×L50mm |
| 150A(φ157.5)×L50mm |
| 200A(φ208.0)×L50mm |
|
|
|
PHC-unit |
| PHC50A-MH2 |
| PHC80A-MH2 |
| PHC100A-MH2 |
| PHC150A-MH2 |
|
| 50A×L200mm |
| 80A×L200mm |
| 100A×L200mm |
| 150A×L200mm |
|
|
|
|
Other size MH-catalysts (Cylindrical, Cubic) are available upon request. |
PHC is constructed catalyst unit with pre-heater and MH catalyst in the SUS304
stainless tube. The feature of PHC is easy to mount in the exhaust line and is
easy to oxidize break down of VOC gas. |
|
| Standard Specification of PHC |
Order No |
Catalyst volume [mL] |
Standard volume of treatment gas (SV=60,000) [L/minl |
| PHC80A-MH1 |
| PHC80A-MH2 |
| PHC100A-MH1 |
| PHC200A-MH2 |
| PHC150A-MH1 |
| PHC150A-MH2 |
|
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