Performance Assessment of Diesel Oxidation Catalyst in On-Road 6-Cylinder Heavy-Duty Diesel Engine

According to the latest emission standards, NOx and PM emission from on road heavy duty diesel engines need to have a dramatic reduction. To limit these emissions, an aftertreatment system consist of Diesel Oxidation Catalyst, Diesel Particulate Filter, Selective Catalytic Reduction and Ammonia Slip Catalyst is installed downstream of the engine. The aim of this paper is to analyze performance of Diesel Oxidation Catalyst (DOC) for light off, HC oxidation and NO to NO2 oxidation. The focus is on the effectiveness of Diesel Oxidation Catalyst by varying the parameters such as space velocity, HC dosing, exhaust flow rate and inlet temperature of catalyst. Usage of diesel oxidation catalyst in aftertreatment system results into lowered HC, CO and NO emissions which is helpful in meeting BS-VI legislation limits.