Denitration | what types of catalysts are used in SCR denitration system?
Release time:
2022-08-09
Selective catalytic reduction method is to control the exhaust NOx of diesel engine, and use No3 or urea as reducing substance to reduce No3 to N2 and H2O under the action of a certain temperature and
Selective catalytic reduction method is to control the exhaust NOx of diesel engine, and use No3 or urea as reducing substance to reduce No3 to N2 and H2O under the action of a certain temperature and catalyst.
SCR catalyst is divided into low temperature catalyst, medium temperature catalyst and high temperature catalyst. The following are the characteristics of each catalyst:
| SCR catalyst | Low temperature catalyst | Medium temperature catalyst | High temperature catalyst |
| Catalyst type | Cuo-SCR | VWT-SCR | Fe-Zeolite |
| Temperature resistance ℃ | 180-250 | 250-420 | 420-600 |
| Sulfur resistance | low | high |
Fuel sulfur <25ppm
Or sulfur in tail gas <2ppm
|
| Thermal aging performance | high | lower | high |
| Maximum denitration efficiency | >98% | >98% | >98% |
The following is the working curve of each catalyst:
| high |
| high |
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