Effect of UWS spray angle and positioning of injector on ammonia concentration in Urea-SCR system

S. Sadashiva Prabhu; Kapilan Natesan; Nagaraj Shivappa Nayak

doi:10.1016/j.matpr.2021.03.026

Effect of UWS spray angle and positioning of injector on ammonia concentration in Urea-SCR system

S. Sadashiva Prabhu^*
, Kapilan Natesan
, Nagaraj Shivappa Nayak

^*Corresponding author for this work

Department of Mechanical & Industrial Engineering Manipal Institute of Technology, Manipal

Research output: Contribution to journal › Conference article › peer-review

8 Citations (Scopus)

Abstract

Compounds like Urea and Ammonium formate can be used to generate the reducing agent, NH₃in De-NO_xSelective 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.

Original language	English
Pages (from-to)	8051-8055
Number of pages	5
Journal	Materials Today: Proceedings
Volume	46
DOIs	https://doi.org/10.1016/j.matpr.2021.03.026
Publication status	Published - 2021
Event	3rd International Conference on Materials, Manufacturing and Modelling, ICMMM 2021 - Vellore, India Duration: 19-03-2021 → 21-03-2021

All Science Journal Classification (ASJC) codes

General Materials Science

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10.1016/j.matpr.2021.03.026

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title = "Effect of UWS spray angle and positioning of injector on ammonia concentration in Urea-SCR system",

abstract = "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.",

author = "\{Sadashiva Prabhu\}, S. and Kapilan Natesan and \{Shivappa Nayak\}, Nagaraj",

note = "Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd. All rights reserved.; 3rd International Conference on Materials, Manufacturing and Modelling, ICMMM 2021 ; Conference date: 19-03-2021 Through 21-03-2021",

year = "2021",

doi = "10.1016/j.matpr.2021.03.026",

language = "English",

volume = "46",

pages = "8051--8055",

journal = "Materials Today: Proceedings",

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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

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 -

Effect of UWS spray angle and positioning of injector on ammonia concentration in Urea-SCR system

Abstract

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