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Nasonova, Anna(나소노바 안나),Kim, Dong-Joo(김동주),Kim, Kyo-Seon(김교선) 강원대학교 산업기술연구소 2010 産業技術硏究 Vol.30 No.B
We analyzed the effects of several process variables on the SO2 removal and particle growth by the dielectric barrier discharge-photocatalysts hybrid process. In this process, SO2 was converted into the ammonium sulfate ((NH4)2SO4) particles. The size and crystallinity of ammonium sulfate particles were examined by using TEM and XRD analysis. The dielectric barrier discharge reactor consisted of two zones: the first is for plasma generation and the second is for ammonium sulfate particles formation and growth. The first zone of reactor was filled with glass beads as adielectric material. To enhance SO2 removal process, the TiO2 photocatalysts were coated on glass beads by dip-coating method. As the voltage applied to the plasma reactor or the pulse frequency of applied voltage increases, the SO2 removalefficiency increases. Also as the initial concentration of SO2 decreases or as the residence time increases, the SO2 removal efficiency increases. (NH4)2SO4 particles continue to grow by particle coagulation and surface reaction, moving inside the reactor. Larger particles in site are produced according to the increase of residence time or SO2 concentrations.
Application of TiO2 Photocatalysts to NO and SO2 Removal in the Dielectric Barrier Discharge Process
Anna Nasonova,김동주,김우식,Tawatchai Charinpanitkul,Kyo-Seon Kim 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.54 No.3
The dielectric barrier discharge process combined with a TiO2 photocatalyst was applied to remove NO and SO2. The dielectric barrier discharge reactor was packed with glass beads as a dielectric material and the glass beads were coated with TiO2 particles by dip-coating into solutions of TiO2 particles prepared by using sol-gel method and of Degussa P-25 TiO2 particles. The TiO2 thin film dip-coated 1 time into the solution of TiO2 prepared by using the sol-gel method was the most uniform and efficient for NO and SO2 removal when using a dielectric barrier discharge - photocatalyst hybrid system. The increase in the applied peak voltage enhanced the NO and SO2 removal efficiencies. The NO and SO2 removal efficiencies decreased as the initial NO and SO2 concentrations were increased. The dielectric barrier discharge process combined with a TiO2 photocatalyst was applied to remove NO and SO2. The dielectric barrier discharge reactor was packed with glass beads as a dielectric material and the glass beads were coated with TiO2 particles by dip-coating into solutions of TiO2 particles prepared by using sol-gel method and of Degussa P-25 TiO2 particles. The TiO2 thin film dip-coated 1 time into the solution of TiO2 prepared by using the sol-gel method was the most uniform and efficient for NO and SO2 removal when using a dielectric barrier discharge - photocatalyst hybrid system. The increase in the applied peak voltage enhanced the NO and SO2 removal efficiencies. The NO and SO2 removal efficiencies decreased as the initial NO and SO2 concentrations were increased.
유전체 장벽 방전-광촉매 복합공정에 의한 NO와 SO2 제거
김교선,김동주,Nasonova Anna 한국청정기술학회 2007 청정기술 Vol.13 No.2
In this study, we analyzed experimently the NO and SO2 removal by the dielectric barrier discharge-photocatalysts hybrid process. The glass spheres were used as a dielectric material for dielectric barrier discharge and the TiO2 photocatalysts were coated onto those spheres by the dip-coating method. The TiO2 particles were coated in the sponge-shape, which has the larger surface area. As the voltage applied to the plasma reactor, the pulse frequency of applied voltage, or the residence time increases, the NO and SO2 removal efficiencies increase. The increase in the supplied concentrations of NO and SO2 leads to the higher energy for NO and SO2 removal and the NO and SO2 removal efficiencies decrease. These experimental results can be used as a basis to design the dielectric barrier discharge-photocatalysts hybrid process to remove NO and SO2. 본 연구에서는 유전체 장벽 방전-광촉매 복합 공정에 의한 NO 및 SO2 제거를 실험적으로 분석하였다. 유전체 장벽 방전을 위해 유전체로서 유리구가 사용되었고 TiO2 광촉매 입자는 딥코팅(dip-coating) 방법에 의해 높은 비표면적을 가지는 스펀지 형태로 유리구에 코팅되었다. 플라즈마 반응기에 인가된 전압이나 펄스 주파수, 혹은 기체의 체류시간이 증가함에 따라, NO 및 SO2의 제거효율은 증가하였다. NO 및 SO2 공급농도 증가하면 NO 및 SO2 제거에 더 많은 에너지가 요구되어 NO 및 SO2의 제거효율이 감소하였다. 본 연구의 실험 결과들은 NO 와 SO2를 제거하기 위한 유전체 장벽 방전-광촉매 복합 공정 설계의 기초 자료로 사용될 수 있다.