| 초록 |
The dielectric barrier discharge-catalyst (DBD-C) hybrid process and dielectric barrier discharge-catalyst-photocatalyst (DBD-C-P) hybrid process were analyzed for NO and SO2 removals. In DBD-C hybrid process, zeolite particles were used as dielectric materials and catalysts for dielectric barrier discharge; in DBD-C-P hybrid process, zeolite particles were coated with TiO2 photocatalyst by a rotating cylindrical PCVD reactor to investigate the combined effects of plasma-catalyst-photocatalyst on NO and SO2 removals. TiO2 photocatalyst was coated partially on the zeolite surface while keeping the porous structure of zeolite. The NO and SO2 removals were studied for various process variables such as applied peak voltage, initial NO and SO2 concentrations, pulsed frequency and residence time. The NO and SO2 removal efficiencies in the DBD-C-P hybrid process are 1.02–3.4 times and 1.03–4 times higher, respectively, than those in the DBD-C hybrid process for the process variables in this study. We found that the zeolite particles coated with TiO2 photocatalyst by a rotating cylindrical PCVD reactor could be effectively used to remove NO and SO2 in DBD-C-P hybrid process. |
