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.

이산화질소, 암모니아 및 수분의 기상반응에 의한 암모늄염 생성 거동에 관한 연구

목영선,이호원,현영진 제주대학교 해양과환경연구소 2001 해양과환경연구소 연구논문집 Vol.25 No.-

This study investigates the kinetics of the gas phase reaction between nitrogen dioxide, ammonia and water vapor, and presents the appropriate ranges of the process variables such as initial NO_2 concentration, absolute humidity and reaction temperature for the effective removal of nitrogen dioxide. According to the kinetic calculations, the gas phase reaction for the removal of NO_2 takes effectively place at the water vapor content higher than 4-6 %(v/v), but further increase in the water vapor content does not significantly enhance the removal. The residence time required to achieve a desired removal efficiency of NO_2 was found to increase with the decrease in its initial concentration. Especially, the residence time required rapidly increases when the initial concentration of NO_2 is less than 100 ppm. The removal rate of NO_2 is in inverse proportion to the reaction temperature, i.e., lower temperature is favorable to promote the removal rate. The results obtained in this study may be useful for the determination of the optimal values of the process variables in non-thermal plasma technology for the removal of nitrogen oxides.

저온 플라즈마를 이용한 휘발성 유기화합물의 분해에 관한 연구

목영선,이호원,현영진 제주대학교 환경연구소 2000 환경연구논문집 : 제주대 Vol.8 No.-

A non-thermal plasma process using pulsed corona discharge was applied to the destruction of a volatile organic compound (propene). Propene was found to be easily destroyed by this process, and the destruction efficiency was proportional to the supplied power while it was in inverse proportion to the initial propene concentration. Ethane and formaldehyde were detected at the reactor outlet, but the concentrations of such byproducts were negligible. The destruction rate equation (first order in terms of propene concentration) and the rate constant (6.75×10^(3)s^(1)W^(1)) proposed were validated by the comparison between the calculations and experimental data. The increases in the contents of oxygen and water vapor decreased the pulse energy delivered to the plasma reactor. At the initial concentration of 5.85 X 10^(3) mol/㎥, the average energy requirement to destroy one molecule of propene was in the range of 26 to 47 eV according to the amount of propene destroyed, which is relatively low value, compared with that of nitric oxide(NO).

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.

Removal of Nitrogen Oxides by Using a Nonthermal Plasma-Assisted Catalytic Process in the Presence of Ammonia

목영선,Ho Won Lee,남인식 한국공업화학회 2004 Journal of Industrial and Engineering Chemistry Vol.10 No.1

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.

이산화질소, 암모니아 및 수분의 기상반응에 의한 암모늄염 생성 거동에 관한 연구

목영선,이호원,현영진 제주대학교 해양연구소 2001 해양자원연구소연구보고 Vol.25 No.-

교류 유전체 방전 공정에 의한 휘발성유기화합물 분해 및 전력공급에 관한 연구

목영선,이호원,현영진 제주대학교 해양연구소 2001 해양자원연구소연구보고 Vol.25 No.-

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.

이산화질소, 암모니아 및 수분의 기상반응에 의한 이산화질소 제거 거동에 관한 연구

목영선,장경룡,박태성,김경숙,남인식 한국화학공학회 2003 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.41 No.1

암모니아 첨가 저혼 플라즈마 공정이나 전자빔 공정에서 NO의 산화반응을 통해 생성되는 NO_2를 효과적으로 제거하기 위한 조건을 도출하기 위하여, 문헌의 반응속도에 기초한 반응기 모델링을 통해 NO_2 저감에 미치는 여러 가지 운전변수의 영향을 살펴보았다. 본 연구에서 운전변수로 선정한 것은 수분함량, 초기 NO_2 농도, 반응온도 그리고 암모니아 농도이며, 각각의 운전변수에 대한 적정 범위를 결정하였다. NO_2를 효율적으로 제거하기 위해서는 배기가스의 수분함량이 4-6%(v/v)이상은 되어야 하나, 수분함량을 더 증가시키는 것은 큰 이득이 없는 것으로 나타났다. 초기 NO_2 농도가 100ppm 이하로 작을 때는 원하는 제거효율을 달성에 필요한 체류시간이 급격히 증가하며, 반응온도는 낮을수록 NO_2제거에 유리한 것으로 나타났다. NO_2 저감 속도는 암모니아 농도이며, 각각의 운전변수에 대한 적정 범위를 결정하였다. NO_2를 효율적으로 제거하기 위해서는 배기가스의 수분함량이 4-6%(v/v)이상은 되어야 하나, 수분함량을 더 증가시키는 것은 큰 이득이 없는 것으로 나타났다. 초기 NO_2 농도가 100ppm 이하로 작을 때는 원하는 제거효율 달성에 필요한 체류시간이 급격히 증가하며, 반응온도는 낮을수록 NO_2 제거에 유리한 것으로 나타났다. NO_2 저감 속도는 암모니아의 농도에 크게 의존하지 않는 것으로 평가되었다. This study reports a simple reactor modeling utilizing chemical kinetic data of the gas phase reaction between nitrogen dioxide, ammonia and water vapor in order to estimate the influences of several operating variables on the removal of NO_2 which is generated from NO by the oxidation process in a non-thermal plasma reactor or an electron-beam irradiation reactor. The operating variables chosen are water vapro content, initial concentration of NO_2, reaction temperature and ammonia concentration and the appropriate ranges of such variables were suggested. The gas phase reaction for the removal of NO_2 takes place effectively at the water vapor content higher than 4-6%(v/v), but further increase in the water vapor content does not significantly enhance the removal. The residence of NO_2 is less than 100ppm. Since the removal rate of NO_2 is in inverse proportion to the reaction temperature, lower temperature is favorable to promote the reaction. The effect of ammonia concentration on the removal of NO_2 was estimated to be negligible.