Place of Origin:
JiangSu, China
Brand Name:
Hivetech
Certification:
ISO9001、ISO14001
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Honeycomb Ceramic Metal Catalyst VOCs Catalytic Combustion Pt Pd Rh Noble Metal Coating
| Quick Detail: | ||||||
| 1. Precious metal content, from 0.2 g/L to 3 g/L | ||||||
| 2. Selection of coating amount: 0.15 g/L, 0.3 g/L, 0.5 g/L, 0.75 g/L and 1.0 g/L. | ||||||
| 3. The removal efficiency is as high as 99.9% | ||||||
| 4. Airspeed up to 30000 1/h | ||||||
| 5. Ultra-long design life > 5 years | ||||||
| 6. Starting temperature > 200℃ | ||||||
| 7. Recommended temperature: 200℃ -650℃ | ||||||
| 8. Ultra-long design life > 5 years |
| Specifications: | ||
| 1 | Conversion Rate | >98% |
| 2 | Service life | 1-4 years |
| 3 | Space Velocity | 10000~35000h-1 |
| 4 | Failure rate | <1% |
| 5 | Appearance | Yellow/black/brown |
| 6 | Packaging | seal |
| 7 | highest operating temperature | 750℃ |
| 8 | Substrate Material | Cordierite |
| 9 | Thermal expansivity(%) | 1.6-1.8 |
| 10 | Compressive strength(MPa) | Lengthways >13； Side direction>5 |
| 11 | Specific surface area of coating(m2/g) | 120-180 |
| 12 | Initiation temperature | >180℃ |
| 13 | Optimum operating temperature | 300~750℃ |
| 14 | Water absorption | 20%~28% |
| 15 | Bulk density (kg/L) | 650-750 |
| 16 | Wall thickness | <0.2mm |
| 17 | Density(g/cm3) | 0.5 |
| 18 | Tolerance | +/-1mm |
With the extension of time, the activity of the catalyst will gradually decline until it becomes inactive.
There are three main types of catalyst deactivation:
(1) The catalyst is completely deactivated. The toxicants that inactivate the catalyst include fast acting toxicants and slow acting toxicants. The fast acting poisons mainly include P, As, etc., while the slow acting poisons include Pb, zn, etc. Normally, the deactivation of catalyst is due to the differentiation or fusion of poison and active group into alloy. For fast acting poisons, even if there is only a small amount, the catalyst can be rapidly deactivated;
(2) Inhibiting catalytic reaction. Halogen and sulfur compounds are easy to combine with the active center, but this combination is relatively loose, reversible and temporary. When such substances in the exhaust gas are removed, the catalyst activity can be restored;
(3) Deposition covers the active center. The presence of unsaturated compounds leads to carbon deposition. In addition, ceramic dust, iron oxides and other particles clog the active center, thus affecting the adsorption and desorption capacity of the catalyst, leading to a decline in catalyst activity.
The following corresponding measures can be taken to prevent catalyst activity degradation:
(1) Properly control the reaction conditions according to the operating procedures;
(2) When the catalyst surface is charred, the combustion temperature is increased by blowing in fresh air to burn off the surface charring;
(3) Pretreatment of waste gas to remove poison and prevent catalyst poisoning;
(4) The preparation process of the catalyst was improved to improve the heat resistance and toxicity resistance of the catalyst.
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