Modelling of non-thermal plasma aftertreatment of exhaust gas streams

Abstract

A reaction mechanism has been developed that is appropriate for the plasma aftertreatment of diesel exhaust gas. It is based on a simulated gas mixture containing propene, nitric oxide, nitrogen dioxide, oxygen and nitrogen. The reaction mechanism has been used to determine the end-products from the plasma processing and their concentrations using a chemical kinetics modelling procedure. It has been validated by a range of experiments using the same gas mixture with a packed bed, a dielectric barrier plasma reactor and a wide range of end-product analysis techniques. Using a wide range of experimental conditions has enabled us to validate the model and its predictions and to critically evaluate several alternative reaction mechanisms for the oxidation of propene and the formation of end-products in a more systematic and reliable manner than before.

Design and Research of Marine Non-thermal Plasma Reactor

“…In the 1990 s, foreign began to research use the low temperature plasma technology to reduce the diesel exhaust [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18].Using the low NTP technology research and development of automobile 3rd International Conference on Mechatronics and Information Technology (ICMIT 2016) exhaust purification device besides general automobile exhaust purifier has the function of, still have the following features: 1) Reduce the engine's fuel consumption. 2) Reduce the engine's noise, smooth operation.…”

Simultaneous removals of NOx, HC and PM from diesel exhaust emissions by dielectric barrier discharges

“…Total hydrocarbons, including SOF and gaseous HC, initially react with O atoms produced in discharges, and afterwards a series of chain reactions occur. Finally, HC are mainly oxidized into CO and CO 2 [28]. NO x reduction in plasma mainly belongs to oxidative process, in which O radicals oxidize NO to NO 2 [29].…”

“…NO x reduction in plasma mainly belongs to oxidative process, in which O radicals oxidize NO to NO 2 [29]. Hydrocarbons are critical to enhance the selective partial oxidation of NO to NO 2 in plasma, in particular the existence of unsaturated hydrocarbons [28,30]. In the presence of water vapor molecules, reactions of NO x with OH radicals further result in the formation of HNO 2 or HNO 3 , which contribute to the leading NO x reduction [15,27,[30][31][32].…”

Low Temperature Plasma Assisted Catalytic Reduction of NO x in Simulated Marine Diesel Exhaust

“…Previous workers have used propene as the reductant in plasma treatment of NO x where no catalyst has been used [9][10][11] and also where a catalyst is used [12][13][14]. A detailed plasma reaction scheme mechanism and its validation have been described previously [15].…”