Articles
  • Investigation of urea selective catalytic reduction system with catalyst coated ceramic monolith

  • Devakaran Karaiellapalayam Palanisamya,* and Arunshankar Jayabalanb

  • aDepartment of Automobile Engineering, PSG College of Technology, Coimbatore
    bDepartment of Instrumentation and Control Systems Engineering, PSG College of Technology, Coimbatore

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The selective catalytic reduction (SCR) and fast-SCR retrofit systems effectively control the nitrogen oxides (NOx) emission for the diesel engine exhaust, using adblue solution and catalyst. The performance characteristic of retrofit system with efficient catalyst and optimum flow channel design, without affecting the engine performance is still a challenging factor. The experimental work is done on a stationary diesel engine test bench coupled to the retrofit system in its exhaust, at steady-state condition. A pair of ceramic monolith coated with cerium oxide (CeO2) and zeolite (ZSM-5) catalysts are used for pre-oxidation and SCR chambers respectively. The catalysts are characterized by XRD method and dip coated over the ceramic monolith. The static mixer blade inside the middle retrofit pipe is used for homogenization and complete evaporation of adblue solution. The influences of NOx conversion efficiency of retrofit systems are investigated with the ZSM-5 catalyst and later combined with CeO2 catalyst. From the experimental results, it is observed that the fast-SCR retrofit system with static mixer blade has a better NOx conversion efficiency, with marginal decrease in engine brake thermal efficiency than the other retrofit systems at maximum brake power. The increase in brake specific fuel consumption (BSFC) of the retrofit system causes the engine brake thermal efficiency to decrease marginally with increase in brake power


Keywords: Adblue, Ceramic monolith, CeO2, Fast-SCR and ZSM-5

This Article

  • 2021; 22(1): 79-85

    Published on Feb 28, 2021

  • 10.36410/jcpr.2021.22.1.79
  • Received on Jul 24, 2020
  • Revised on Dec 2, 2020
  • Accepted on Dec 4, 2020

Correspondence to

  • Devakaran Karaiellapalayam Palanisamy

  • Department of Automobile Engineering, PSG College of Technology, Coimbatore
    Tel : +91422 4344281 Fax: +91422 2573833

  • E-mail: kpd.auto@psgtech.ac.in