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The Selective Non Catalytic Reduction And Selective Catalytic Reduction Of NOX: A Critical Review And Experimental Investigations

R.R.Kulkarni, A.A.Pawar

In this paper, the applicability of selective non catalytic reduction and selective catalytic reduction processes has been compared. The effect of oxidation catalyst i.e. catalytic converter on emissions like HC, CO, NOX on a single cylinder diesel engine has been investigated. Three major SNCR processes for removal of oxides of nitrogen from engine exhaust gases are compared with SCR process. The three SNCR processes are similar each uses a different chemical agent ammonia, urea and cyanuric acid and were found to be most effective at low, intermediate and high concentrations of oxygen respectively. The implications of these results for a single cylinder 500cc diesel engine are discussed.