Addition of V2O5-MnO2/USY-zeolite catalyst in PTFE fiber for bag filter and its catalytic activity tests for NH3-SCR at low-temperature

Jin Ho Boo,Eunseok Kim,Byung Chan Kwon,Myung Jo Seo,Ji Man Kim,Ji Bong Joo,Dohyung Kang,No-Kuk Park 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.123 No.-

This study investigated the catalytic activity of vanadium-manganese supported on USY-zeolite as a catalystfor low-temperature NO removal, and embedded the powder catalyst in PTFE filter of bag filter. TheV2O5-MnO2/USY-zeolite catalyst was prepared using the co-impregnation method, and the V2O5/MnO2ratio was 0/10, 2.5/7.5, 5/5, 7.5/2.5, or 10/0. The catalytic activity test for NH3-SCR(selective catalyticreduction) of NO was performed at 150–230 C. An enhanced NO conversion above 60% was exhibitedin the low-temperature region below 230 C, and the NO removal efficiency increased as the MnO2 contentincreased. The NH3-TPD and NO-TPD(Temperature Programmed Desorption) analysis confirmed thatthe NH3 adsorption of the catalyst more significantly influences the NO removal performance than the NOadsorption. As the MnO2 content on the catalysts increased, the strength and amount of adsorbed NH3increased, resulting in enhanced NO conversion. The catalyst-embedded PTFE (polytetrafluoroethylene)fiber was prepared by extruding physically mixed PTFE and catalyst powder. Scanning electron microscopy/energy dispersive X-ray spectroscopy confirmed that the catalyst was well dispersed on the surfaceand inside the PTFE fiber. The NO removal performance of the catalyst included PTFE fiber increased asthe amount of the catalysts added was increased.

비강비호즈킨 림프종의 전산화단층촬영 소견 : CT Features

노태연,백호길,원종부,박성호,박오봉,백승국,신미정,김봉기,최한용 침례병원 1998 浸禮病院學術誌 Vol.14 No.-

중생 고품질 내병 다수성 벼 ‘영보(嶺寶)’

박노봉(No-Bong Park),김상열(Sang-Yeol Kim),여운상(Un-Sang Yeo),김정일(Jeong-Il Kim),이지윤(Ji-Yoon Lee),권오덕(Oh-Deog Kwon),박동수(Dong-Soo Park),이종희(Jong-Hee Lee),조준현(Jun-Hyun Cho),송유천(You-Cheon Song),오성환(Seong-Hwan Oh) 한국육종학회 2019 한국육종학회지 Vol.51 No.4

‘Yeongbo’ is a variety of japonica rice (Oryza sativa L.) with good eating quality, resistance to rice stripe virus, rice dwarf virus, and bacterial blight disease. It was developed by the rice breeding team of the Yeongdeok Branch, National Institute Crop Science, Rural Development Administration in 2014. This variety was derived from a cross between ‘Yeongdeog35’ with good eating quality and ‘Saekyehwa’ with good plant type in the 2002 summer season. A promising line selected through the pedigree breeding method, YR24269-1-2-1-2-3-3, was designated as ‘Yeongdeog57’ in 2011. After a local adaptability test at nine locations from 2012 to 2014, ‘Yeongdeog57’ was released under the name of ‘Yeongbo’ in 2014. ‘Yeongbo’ had a short culm length of 66 cm and medium growth duration. This variety was resistant to K1, K2, and K3 races of bacterial blight, rice stripe virus, and dwarf virus, and moderately resistant to leaf blast disease. ‘Yeongbo’ had translucent and clear milled rice kernel without white core and belly, and good eating quality according to a panel test. The yield potential of ‘Yeongbo’ in milled rice was approximately 5.75 MT/ha at an ordinary fertilizer level in the local adaptability test. This cultivar would be adaptable to middle plain area, south plain area, Yeongnam plain area, east costal area, and south mid-mountainous area. (Registration No.6804)

글라스 아이오노머 시멘트의 표면처리방법에 따른 복합레진과의 전단결합강도에 관한 연구

노봉환,황호길,조영곤 大韓齒科保存學會 1995 Restorative Dentistry & Endodontics Vol.20 No.1

교감의 지도성 유형과 직무성과의 관계

노봉근,박고훈 木浦大學校 敎育硏究所 2001 교육연구 Vol.14 No.-

본 연구는 인간에게 보편적인 창의성을 부각시키려는 의도하에 이루어진 것으로 그 목적에 상응하는 행위로서 학업성취도에 대한 창의성의 설명력을 알아보고자 하였다. 또한 창의성이 지능과 상호작용을 이루면서 학업성취도와 관련이 있을 것이라고 예측하였다. 본 연구는 중다회귀분석으로 학업성취에 대한 지능과 창의성의 설명력을 알아보았다. 본 연구결과에 의하면 지능이 창의성의 유연성, 정교성 변인에 뒤이은 낮은 단계의 모형에 속함으로서 대인관계나 공간은 비교적 창의성의 변인들보다 낮은 설명력을 갖는다. 본 연구의 결과분석에 따라서 창의성이 지능과 함께 학업성취도를 설명할 수 있다는 것은 창의성 변인이 학업성취를 예측할 수 있는 것으로, 창의성에 대한 보편적 접근과 연구가 이루어질 것으로 기대한다. This study is to find out a good method for the purpose of maximizing the effectiveness of school management, by way of making clear the types of vice principals's leadership and the things which influence on its job results within organization, and coinciding in opinion and minimizing the conflict between vice president and teachers. In conclusion, because teacher's level of mature was generally high in school situation, it is desirable for vice principal to do the role of entrusting leadership, creating permissive atmosphere. Furthermore, through opening him/herself by exposing him/herself to the members of the organization, vice principal should reduce the conflict between members and enlarge the leadership area and effectiveness through feed-back.

XLPE Film의 電氣傳導特性에 미치는 極性效果에 關한 硏究

朴魯峰 충주대 산업과학기술연구소 1999 産業科學論文集 Vol.7 No.1

Polymeric materials such as XLPE have been used extensively in the power transmission line for a variaty of reasons, including low cost and easy processing. however, many kind of factors have influence on the electrical properties of polymer such as mechanical stress, impurity, additives, chemical blend, interfacial phenomena etc. In this study, we lay emphasis on interfacial phenomena which is important part in insulating design of power cable. The electrical conduction characteristics of XLPE film are investigated as a function of different electrode matals and applied polarity reversal. Also, it was evaluated at electric fields of 30∼800[kV/cm].

저밀도 폴리에틸렌의 트리잉진전에 미치는 부분방전펄스의 영향

박노봉,박영국 충주대 산업과학기술연구소 1998 産業科學論文集 Vol.6 No.-

Inception and ptopagation of electrical tree and properties of partial discharge(PD) pulses accompanying with tree in low density polythylene were discussed. We observed the characteristic of process of electrical tree by using optical microscope and investigated the statisical characteristics of the PD pulses by analyzing PD quantities and distribution pattern. The PD quantities detected and analyzed were PD magnitude, repetion rate, average discharge power, mean phase angle and q-n, Φ-n Φ-q and Φ-q-n distribution pattern. The statistical operators used were skewness(s), kurtosis(k) and average phase angle. The average discharge power of PD appears good linear relation with propagation of tree and the repetition rate and magnitude of PD are increased with the propagation of tree. The skewness and average discharge phase angle of PD pulses increases as the Propagation of ree. The kurtosis was about 1.8 at the Inception of tree, but It increased as the propagation of tree.

SO₂로부터 원소 황 회수를 위한 Ce_(1-x)Zr_(x)O₂ 촉매반응연구

김봉석,이종대,박노국,류시옥,이태진,김재창 한국화학공학회 2003 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.41 No.5

Ce_(1-x)Zr_(x)O₂ 촉매상에서 CO에 의한 SO₂의 촉매환원으로부터 원소 황 회수 반응에 대하여 연구하였다. Ce_(1-x)Zr_(x)O₂ 촉매는 Ce/Zr 조성비를 x=1, 0.8, 0.5, 0.2, 0과 같이 조절하여 제조하였으며 반응온도(400-450℃), 공간속도(10,000-70,000 h^(-1)) 변화에 따른 SO₂전화율과 원소 황(S)선택도를 조사하였다. Ce_(1-x)Zr_(x)O₂촉매의 최적반응온도는 425℃ 이었으며 공간속도 50,000 h^(-1)에서 Ce_(0.8)Zr_(0.2)O₂와 Ce_(0.5)Zr_(0.5)O₂ 촉매의 SO₂ 전환율이 93%, 원소 황 선택도 98%로 CeO₂, Ce_(0.2)Zr_(0.8)O₂ 촉매보다 반응성이 높았다. Ce_(1-x)Zr_(x)O₂촉매에 Zr의 첨가량이 증가할수록 CeO₂의 환원률이 증가되었으며, 이러한 결과는 산소 저장성이 우수한 CeO₂에 Zr를 첨가함으로써 산소이동성이 증가되었기 때문인 것으로 판단된다. 본 연구에서 Zr의 첨가로부터 Ce-based 촉매의 격자산소 환원과 비어있는 격자산소 자리의 재산화에 영향을 주어 redox 반응특성을 개선할 수 있음을 확인하였다. The catalytic reduction of SO₂ to elemental sulfur with CO over Ce_(1-x)Zr_(x)O₂ was studied. The Ce_(10x)Zr_(x)O2 catalysts were prepared by changing the Ce/Zr mole ratio(x=1, 0.8, 0.2, 0). The reactivity of Ce_(1-x)Zr_(x)O₂ in accordance with experimental conditions, such as reaction temperature(400-450??), space velocity (GHSV: 10,000-70,000 h^(-1)) were investigated. The conversion of SO2 and the selectivity to elemental sulfur in the recovery of elemental sulfur from SO2 using Ce_(0.8)Zr_(0.4)O₂ and Ce_(0.5)Zr_(0.5)O₂ catalysts were respectively about 93% and 98% at temperature about 425 ??, which were superior to other catalysts. It seems that the reactivity is influenced by the Ce/Zr mole ratio. From these results, it was concluded that the oxygen mobility of catalysis was increased with inserting the Zr. Because the reduction of lattice oxygen and reoxidation of Ce-based catalysts was improved by the adding Zr, it is possible to improve the redox characteristic.

책상의 照度分布와 反射光幕이 눈의 피로에 對한 考察

朴魯蜂 충주대학교 1979 한국교통대학교 논문집 Vol.12 No.2

The room chosen for the experiment was 2.5 m by 3.3 m by 2.8 m high. A spacd of the visual task pekfarmance was illuminated by ceiling fittings and table lamps. Light sources were cool white nuorescent lamps and incandesent lamps. The illumination levels were adapted for the performance of visual tasks from 300 Lx to 700 lx on the surface of the chart. The visual task consisted in the recognition of small Landlt's rings of 2.5mm diameter printed with black ink of 3% reflactance on the mat white paper or drawing paper. Besides, the subject read the books as visual task. The task time was Iinited to 80 minutes or 120 minutes.

棒一平板電極에서 空氣中 正極性 스트리마 시뮬레이숀에 關한 硏究

朴魯峰 忠州大學校 1995 한국교통대학교 논문집 Vol.30 No.2

I found out the fact that streamer-making in the spark discharge was much influenced. However, in spite of the fact that we find amuzing blackdown characteristics in the unequal electric field, the intrepretations are not found so much. This paper aims at the interpretation on the streamer from the streamer simulation in relation with the spacial change, time change, and charge atom density.