Positive DC corona discharge in N₂-NO-CO₂-O₂ mixtures

Positive DC corona discharge in a hemicylindrical discharge reactor was applied to mixtures containing N₂, NO, O₂, CO₂ and H₂O, while an NO_x chemiluminescence analyzer and an IR spectrometer were used to evaluate the concentration changes and analyze the products of the process in the discharge chamber. The removal efficiency of 89% for NO and the energy cost of 350 eV/molecule were achieved. Special attention was paid to the influence of CO₂ on discharge, its character, performance and products of the process. In addition to the main components of the gas mixture (NO, NO₂, CO₂, CO etc.), other compounds and functional groups (e.g., amides I-III, imides, NCO) have been identified among the products of the process.