Optimization of Urea Injection System in Selective Catalytic Reduction System in Diesel Engines

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A. Jayanth Joseph
P. Senthil Kumar
N. Mageshwaran
R.V. Prasad
J. Balakumaran
A. Gunalan

Abstract

This work aims to reduce NOx emission using selective catalytic reduction (SCR) system. Many legislations have placed limitations on the automotive sector in an effort to reduce diesel engine pollution. Advanced engine technology aims to manage pollutant reduction and lower the level of unburned HC, CO2 and CO in order to comply with emission regulations. Yet, it is challenging to adhere to the NOx limitations set by global standards like the Bharat Standard (BS VI) and the European Standard (EURO VI). To comply with strict emission standards, nitrogen oxides (NOx), a kind of exhaust emission from diesel engines, should be efficiently eliminated using the appropriate De-NOx processes. Effective use of a method known as SCR can achieve this. In SCR, Urea Water Solution (UWS), a 32.5% aqueous urea solution, is added to produce the reducing agent ammonia (NH3) that is necessary for the reduction of NOx.

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