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:
 
 
 
 
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生物医药
 
 

Temperature resistance ℃

high

 

high