SCR-DeNO sub(x) for Diesel Engine Exhaust Aftertreatment: Unsteady-State Kinetic Study and Monolith Reactor Modelling

Experiments investigating the kinetics of NH sub(3) adsorption-desorption and the kinetics of the NO + NH sub(3)/O sub(2) Selective Catalytic Reduction (SCR) reaction were carried out for temperatures in the range of 50-450 degree C and in the presence of water over a commercial powdered V sub(2)O sub(5)-WO sub(3)/TiO sub(2) catalyst loaded in a micro-reactor. Data are reported detailing the influences of water and oxygen feed contents. The project applied Different Transient Response Techniques to evaluate SCR dynamics with respect to vehicular applications. A dynamic 1-D heterogeneous PFR model was used to evaluate experimental findings. Data were fitted by multiresponse nonlinear regression to yield estimates of the rate parameters.