Odor control using the AC barrier-type plasma reactors

Odor control from living environment becomes the increased concern. In the previous paper, we investigated the removal of acetaldehyde (CH3 CHO), whic h is one of the main odor components in cigarette smoke using the barrier-t ype packed-bed plasma reactor. In the present paper, we reported on the new results of acetaldehyde and ammonia (NH3) which is another odor component of cigarette smoke. In the experiment, two kinds of ac nonthermal plasma re actor were used. One is the packed-bed plasma reactor used in the previous paper, the other is the film-type plasma reactor consisted of laminated par allel aluminum plate electrodes. This reactor has lower pressure drop and h igher energy efficiency than the packed-bed plasma reactor. In the experime ntal results using the packed-bed plasma reactor, more than 95 % of acetald ehyde removal efficiency was obtained under dry air and N-2 environment. As for NH3 removal, almost 100% removal efficiency was obtained with minimum reaction byproduct under dry air environment. In the experimental results u sing the film-type plasma reactor, it was confirmed that more than 90% of a cetaldehyde removal efficiency could be obtained when the applied voltage i s 8 kV (SED = 391 J/L). The by-products were quantified using an FT-IR. The induced HNO3 reacted with NH3 to produce NH4 NO3 aerosol. In treatment of cigarette smoke, one of the main odor components NH3 can be completely remo ved. However, complete removal of another main odor component CH3 CHO was s omewhat difficult because of its low concentration.