Multiparametric investigation on NOxremoval from simulated diesel exhaust with hydrocarbons by pulsed corona discharge

The influence of temperature and hydrocarbon additives on NO x removal and CO production has been studied by numerical modelling and process experiments for a synthetic gas mixture consisting of N 2 , O 2 , H 2 O and CO 2 in a pulsed corona reactor. The NO reduction of more than 99% was achieved at the energy cost of ∼14 eV per NO molecule in the presence of 550 ppm C 3 H 6 additive at T = 393 K. The simulated results agree well with the experimental data measured in the NO and NO x removal and C 2 H 4 and C 3 H 6 decomposition. Within a limited framework of non-uniform modelling approach, the temperature effect on the streamer nature discharge has been taken into account. Main reaction paths for the C 2 H 4 and C 3 H 6 decomposition and leading reactions of NO x conversion, CO, CH 2 O, CH 3 CHO productions are presented. Calculated concentrations of some by-products are given. The effect of the C 3 H 6 +O reaction on the NO x oxidation and C 3 H 6 decomposition using several channels and their rate constants taken from the literature has been examined numerically. The best fitting data for the C 3 H 6 +O reaction are chosen.