TY - JOUR
T1 - Effect of UWS spray angle and positioning of injector on ammonia concentration in Urea-SCR system
AU - Sadashiva Prabhu, S.
AU - Natesan, Kapilan
AU - Shivappa Nayak, Nagaraj
N1 - Publisher Copyright:
© 2021 Elsevier Ltd. All rights reserved.
PY - 2021
Y1 - 2021
N2 - Compounds like Urea and Ammonium formate can be used to generate the reducing agent, NH3in De-NOxSelective Catalytic Reduction Systems (SCR). In Urea-SCR, optimized Urea-Water Solution (UWS) injection is a key factor for ammonia (NH3) distribution in SCR mixing chamber. The present simulation study emphasizes the effect of UWS injection strategies and positioning of the injector on NH3conversion efficiency through parametric studies at temperature range of 300-400°C using CFD code AVL FIRE. Simulations were carried out for three spray angles of UWS injection at two different UWS injector positions. For lower spray angles, the NH3concentration was low and it found to increase with an increase in spray angle. The optimized spray angle is necessary in balancing both NH3genartion and wall interaction. The 3D-simulations considering residence time for various spray angles determine the time to achieve maximum NH3concentration in SCR mixing domain. The shifting of injector position leads to variation in urea decomposition and distribution of NH3in the SCR chamber.
AB - Compounds like Urea and Ammonium formate can be used to generate the reducing agent, NH3in De-NOxSelective Catalytic Reduction Systems (SCR). In Urea-SCR, optimized Urea-Water Solution (UWS) injection is a key factor for ammonia (NH3) distribution in SCR mixing chamber. The present simulation study emphasizes the effect of UWS injection strategies and positioning of the injector on NH3conversion efficiency through parametric studies at temperature range of 300-400°C using CFD code AVL FIRE. Simulations were carried out for three spray angles of UWS injection at two different UWS injector positions. For lower spray angles, the NH3concentration was low and it found to increase with an increase in spray angle. The optimized spray angle is necessary in balancing both NH3genartion and wall interaction. The 3D-simulations considering residence time for various spray angles determine the time to achieve maximum NH3concentration in SCR mixing domain. The shifting of injector position leads to variation in urea decomposition and distribution of NH3in the SCR chamber.
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U2 - 10.1016/j.matpr.2021.03.026
DO - 10.1016/j.matpr.2021.03.026
M3 - Conference article
AN - SCOPUS:85114170351
SN - 2214-7853
VL - 46
SP - 8051
EP - 8055
JO - Materials Today: Proceedings
JF - Materials Today: Proceedings
T2 - 3rd International Conference on Materials, Manufacturing and Modelling, ICMMM 2021
Y2 - 19 March 2021 through 21 March 2021
ER -