FABRICATION AND ANALYSIS OF 3 WAY CATALYTIC CONVERTER USING SCR

MECHANICAL ENGINEERING

A catalytic converter is an exhaust emission control device that converts toxic gases and pollutants in exhaust gas from an internal combustion engine into less-toxic pollutants by catalyzing a redox reaction (an oxidation and a reduction reaction). Selective catalytic reduction (SCR) is a means of converting nitrogen oxides, also referred to as NOx with the aid of a catalyst into diatomic nitrogen (N2) , and water (H2O). A gaseous reductant, typically anhydrous ammonia, aqueous ammonia or urea, is added to a stream of flue or exhaust gas and is adsorbed onto a catalyst. Carbon dioxide, CO2 is a reaction product when urea is used as the reductant. We have further developed this system by deploying a new redox agent which has greater reduction of NOx and CO2. We have used reduction agent like Ammonium chloride and Zinc to convert NOx into Ammonia, Ammonia is further oxidized by Manganese Dioxide to form Ammonium hydroxide. After the Ammonium hydroxide is converted a dilute HCL is sprayed to make Ammonium hydroxide into Ammonium chloride. A small-scale Ammonium chloride is formed inside the muffler which must be maintained and cleaned for an interval period of time

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