Abstract ▼ AI-Helper

Among emission gases, a Diesel Particulate Filter(DPF) to reduce PM, while a Diesel Oxidation Catalyst(DOC) or NH3-SCR using Urea for reduction of $NO_x$, are heavily studied around the world for commercial application. Moreover, to meet values of the strict regulations, a combination of ...

Among emission gases, a Diesel Particulate Filter(DPF) to reduce PM, while a Diesel Oxidation Catalyst(DOC) or NH3-SCR using Urea for reduction of $NO_x$, are heavily studied around the world for commercial application. Moreover, to meet values of the strict regulations, a combination of emission reduction devices are required. One-dimensional DOC, DPF and SCR models in regard to $NO_x$ and PM reductions by NH3-SCR and NO-$NO_2$ conversion by oxidation catalyst incorporates essential individual physics. A series of numerical experiments were carried out and parametric analysis of the $NO_x$ and PM reductions was conducted. The models were validated with extensive empirical data regarding reduction efficiency. $NO_x$ conversion is a weak function of the flowrate at higher temperature. The $NO_x$ reduction depends on NO/$NO_2$ ratio at temperatures lower than 300.