Affiliations: Department of Man-Machine and Environment Engineering,
College of Aerospace Engineering, Nanjing University of Aeronautics and
Astronautics, Nanjing 210016, China
Abstract: As a new type of NO removal system, NO reduction in
N_2-NO plasma was applied to solve the difficulties in the
traditional methods, such as higher energy-consumption, larger equipment size
and high cost, and so on. Using the experimental NO reduction system with
single-pair electrode tip discharge structure, the NO reduction characteristics
of N_2-NO system were revealed to guide the engineering
practice; the results of NO reduction with single-pair electrode tip discharge
plasma also have the same instructive meaning to the NO reduction with
multi-pair electrode tip discharge plasma. The amount of both active N atom and
NO removal rate increased with the distance I_g increasing
between the two electrode tips and then dropped when the distance exceeded a
certain value. The NO removal rate increased while the voltage between two
electrode tips or the resident time of gas flow increased. The distance is a
key geometrical variable factor that can determine the intensity of electric
field between two electrode tips and the resident time of gas. In this paper,
the effects of the dielectric features on NO reduction using dielectric-barrier
discharge plasma system were also studied. The results of NO removal rate with
different dielectrics such as Al_2O_3,
CaO, MgO and glass showed that the electric field intensity is different with
different dielectric, because it brings different energy to particles in
discharge room and thus it causes different NO removal rate.
Keywords: NO reduction, plasma, characteristic, single-pair electrode tip discharge, dielectric-barrier discharge
