Numerical Analysis of Iron-Zeolite Based Emission Control Device for Two-Wheelers

The present work involves numerical simulation of a novel emission control device (Indian Patent Publication Number: 41/2018) for about 30 million two-wheeled vehicles running on Euro3/BS III norms without a catalytic converter across the Asia Pacific. The governing equations for turbulent fluid flow and species transport with eddy dissipation and PDF models have been solved on commercial package FLUENT^® to predict the behavior of oxides of nitrogen (at different engine loads) in presence of Iron-Zeolite. Substrates of Iron Zeolites with high viscous resistance provide ample residence time for adsorption of exhaust gas molecules and reduction of inorganic oxides. The findings show that the concentration of harmful oxides of Nitrogen in exhaust gases gets reduced by approximately 50% by conversion to harmless nitrogen gas. Furthermore, the geometry is optimized in a way to ensure invariance in standard speed-torque characteristics of the engine by generating negligible back pressure. The device provides an optimal business and environmental solution by controlling emissions through extremely cheap and innovative Iron-Zeolite at places where ultra-expensive Platinum/Palladium/Rhodium based catalysts are not feasible.