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Nonthermal Plasma-enhanced Catalytic Methanation of CO over Ru/TiO2/Al2O3
목영선,강호철,고동준,신동남,백준현 한국물리학회 2010 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.57 No.3
Catalytic methanation of carbon monoxide (CO) was investigated in a nonthermal plasma (NTP) reactor packed with Ru/TiO2/Al2O3 catalyst pellets. With the NTP alone, no conversion of CO was observed over the entire temperature range of 240 - 300 ℃, but the combination of plasma and catalyst was found to greatly improve the catalytic conversion of CO, particularly in the lower temperature region below 280 ℃. Higher CO conversion efficiencies were obtained at higher applied voltages because of increased NTP action in the catalytic reactions. The increase in the voltage resulted in a decrease in the activation energy for methanation. Reaction products, including CH4 and CO2, were identified by using a Fourier transform infrared (FTIR) pectrometer. The increases in the applied voltage and in the temperature tended to slightly bring down the selectivity toward CH4, it being more than 0.93 under all experimental conditions explored.
실내공기정화기에서 먼지 및 유기물화합물의 동시 제거에 관한 연구
목영선,강호철,이호원,현영진 제주대학교 공과대학 첨단기술연구소 2002 尖端技術硏究所論文集 Vol.13 No.1
The indoor air cleaner used in this study consisted of a plasma reactor followed by an electrostatic precipitator. The role of the electrostatic precipitator is to collect particulate matters, and the plasma reactor plays an important role in decomposing organic compounds and precharging particulate matters in order that they may easily be collected in the following electrostatic precipitator. For the performance test of the air cleaner, toluene, trichloroethylene (TCE), n-butanol and methanol were added to the indoor air. According to the experimental data, the collection efficiency of particulate matters was found to be largely enhanced when the plasma reactor was operated. This enhancement of collection efficiency is believed to result from precharging particulate matters. A large amount of electrical energy was required for the decomposition of the organic compounds, which indicates that the indoor air should be repeatedly circulated for proper treatment.
플라즈마와 cordierite 지지 촉매를 이용한 diethylether의 분해
목영선,( Quang Hung Trinh ),조진오,이호원,현영진 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
허니컴 형상의 cordierite 지지 촉매 (Mn, Fe, Mn-Fe oxides)와 결합된 저온 플라즈마 공정을 이용하여 diethylether (DEE, 농도: 150 ppm; 유량: 1 L min-1)제거 연구를 수행하였다. 플라즈마 생성방식은 유전체배리어방전이었으며, 반응기는 실린터 구조였다. 1단계 반응기 구성 (플라즈마 방전 공간내에 촉매 설치)의 경우 대부분의 DEE 분해가 플라즈마에 의해 일어났으며, Mn, Fe, Mn-Fe 촉매는 상승효과를 나타내지 않았다. 이 결과는 플라즈마에 의한 DEE 분해속도가 너무 빨라 촉매에 의한 효과가 감추어졌기 때문으로 판단된다. 그러나 2단계 반응기 구성 (플라즈마가 생성되는 영역의 하류에 촉매를 설치)의 경우, 1단계 반응기 구성과 달리 DEE 분해성능이 향상되는 현상을 보였는데, 이는 촉매상에서 오존이 분해되어 더 산화력이 우수한 산소 라디칼이 생성되었기 때문이다. 조사된 촉매중 Mn-Fe/cordierite가 플라즈마에 의해 생성된 오존의 분해에 가장 효과적이었으며, DEE를 가장 빠르게 저감시키는 것으로 나타났다.
기체 전기방전을 이용한 리액티브 블루 4의 분해에 관한 연구
목영선,조진오,이호원 제주대학교 공과대학 첨단기술연구소 2006 尖端技術硏究所論文集 Vol.17 No.1
Gaseous electrical discharge is an effective method available for the production of ozone and ultraviolet light. The wastewater treatment system of this study was designed to utilize both ozone and ultraviolet light produced by the electrical discharge for the degradation- of organic contaminants. The electrical discharge device (DBD reactor) consisted of a quartz cylinder, a coaxial ceramic tube inside of which a steel rod was placed (discharging electrode), and a steel wire that was helically wound around the quartz cylinder (ground electrode). The DBD reactor was immersed in the wastewater in order that the ultraviolet light could irradiate the wastewater. The ozone-containing gas from the DBD reactor was sparged throughout the wastewater. An anthraquinone-based dye, Reactive Blue 4, was chosen as the organic contaminant. The experimental results showed that the present system was very effective for the degradation of the organic contaminant. The energy requirement for the degradation was found to be 0.42kJ/mg, on the basis of 90% chromaticity removal.
교류 유전체 방전 공정에 의한 휘발성유기화합물 분해 및 전력공급에 관한 연구
목영선,이호원,현영진 제주대학교 해양과환경연구소 2001 해양과환경연구소 연구논문집 Vol.25 No.-
Dielectric barrier discharge reactor packed with glass beads or scoria was utilized for decomposition of volatile organic compounds including benzene, toluene, trichloroethylene, n-butanol and chloroform. Glass beads of 4 to 6 mm in diameter and scoria of 4.75-6.7 mm were used as the dielectric packing materials. The effects of the dielectric packing materials, the gas composition, the applied voltage, and the polarity of the voltage on the decomposition and the power delivery were examined. Filling of the dielectric materials such as glass beads and scoria in the reactor gave rise to the increase in the decomposition of the organic compounds and the discharge power. In spite of the adsorption capability, the scoria showed similar decomposition performance to the glass beads, which indicates that the adsorption capability does not significantly affect the decomposition in steady state condition. In the absence of the dielectric packing material, higher voltage was required to decompose the organic compounds. The gas composition did not largely influence the decomposition efficiency of the organic compounds. When the AC voltage was rectified to positive or negative half-wave, the discharge power and the decomposition efficiency greatly decreased. The power transfer efficiency from the wall plug to the reactor was found to be a strong function of the applied voltage, and a weak function of the gas composition.