Vanadia-Based Catalysts for Mobile SCR

Department BF66330, BC2, Volvo Group Trucks Technology, SE-405 08 Gothenburg, Sweden 

Nova and E. Tronconi (eds.), Urea-SCR Technology for deNOx After Treatment of Diesel Exhausts, Fundamental and Applied Catalysis, 

The other path would be to lower the engine-out NOx to the legislated value with later injection timing and cooled EGR. This would lead to higher soot from the combustion and higher fuel consumption. A DOC (diesel oxidation catalyst) and/or a DPF (diesel particulate filter) are then used in order to reduce the particulates to the legislated value (Fig. 3.2). 

The choice of system is not obvious. The SCR system has the advantage of a simpler engine design leading to less complexity and lower engine product cost. Since the SCR system does not require cooled EGR, higher engine power output 

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