Non-thermal Plasma for Removal of NOx from Diesel Engine Vehicle: A Simulation Study

Abstract

This paper presents the simulation case study of non-thermal plasma for removal of nitrogen oxide, NOx from diesel engine vehicle. The geometric properties of the exhaust chamber are analyzed and discussed in order to obtain the most effective geometric properties of exhaust chamber that will help the process of NOx reduction become more effective. The gap between the exhaust case and perforated metal, the length of the exhaust chamber, no. of stages, hole diameter of the perforated metal and the thickness of the perforated metal are studied in details. The method used to study these geometric properties of the exhaust chamber is mesh and boundary condition. Optimum NOx reduction is achieved using exhaust chamber gap between 45mm and exhaust chamber length of 190mm with NOx reduction by 61.11%. Maximum NOx reduction is achieved by using 3 stages of the exhaust chamber with reduction by 70.63%. In addition, the hole diameter of the perforated metal with 5 mm and 1 mm of thickness are the most effective geometric properties of the perforated metal that will produce a high speed of gaseous inside the exhaust chamber and uniform speed of flow in the exit duct.