Experimental investigation on reducing agents for catalytic converters of CI engine

Abstract

High level pollution and emissions arising out of ever-increasing transport vehicles are wrecking a lot of havoc on the environment globally. Stringent emission norms and regulations force the research community across the globe to develop exhaust gas after-treatment systems for effective emission control. Catalytic converters are used to reduce the emissions of hydrocarbon, nitrogen oxides, carbon monoxide and particulate matter. Selective catalytic reduction (SCR) is a system used in IC engines, in which the NOx emission is reduced by injecting a reducing agent in the presence of catalyst. Normally adblue solution is used as the reducing agent for the dissociation of NOx into nitrogen and water. However, it has many drawbacks like NH3 slip, deposit formation and incomplete conversion of NOx. In the present study investigation has been carried out in a CI engine provided with a Vanadium based catalytic converter. Three different reducing agents were used for the dissociation of NOx into nitrogen and water and their effectiveness in controlling the NOx emission has been analyzed and reported.