코발트 프탈로시아닌 촉매를 이용한 메탄올의 연소특성

서성규,윤형선 여수대학교 1998 論文集 Vol.13 No.2

The catalytic combustion of methanol as a model volatile organic compound has been investigated over metallo-phthalocyanine(PC) catalysts in a fixed bed flow reactor system at atmospheric pressure. The catalytic activity was examined with reaction temperature: 200∼350℃, methanol(CH3OH): 2.29∼2.35mole% in air, contact time(W/F):0.62∼3.11 g-cat·hr/g-mol. The order of catalytic activity is summarized as follows: metal free-PC<Zn-PC<Fe-PC<Cu(a)-PC<Co-PC. The pretreated cobalt phthalocyanine catalysts have been characterised by TG/DTA. EA and XRD analysis. The catalytic activity pretreated with air and methanol mixture, 450℃, 1hr was very excellent. Under this pretreatment condition, the change from cobalt phthalocyanine(Co-PC) catalyst to new cobalt metal oxide(Co3O4) was confirmed by EA and XRD analysis. This cobalt metal oxide has high catalytic activity on methanol combustion.

코발트 담지 카본블랙 촉매를 이용한 아세트알데히드 산화반응

서성규,윤형선 國立 麗水大學校 環境問題硏究所 2002 環境硏究論文集 Vol.5 No.-

This study was performed to investigate the possibility of acetaldehyde oxidation on Co/carbon black catalyst. The experiment was conducted at the reaction temperature of 200~440℃, the acetaldehyde concentration of 0.94mole% in air and the cobalt loading amounts of 2~60wt%. The characterization of the carbon black and Co/carbon black catalyst was carried out by TGA and XRD analysis. The thermal characteristics of the carbon black was stable to the high temperature(600℃). XRD result showed that Co/carbon black were destroyed and new metal oxide were formed such as Co_(3)O_(4). Co_(3)O_(4) crystallite addition on the catalysts surface provided the greatest enhancement of the catalytic activity. The order of activity on acetaldehyde oxidation was summarized as follow: SiO_(2)<TiO_(2)<carbon black<SiO_(2)-Al_(2)O_(3). It was found from the experimental results and the economic consideration that carbon black could effectively be utilized as a support for acetaldehyde oxidation. The activity of Co/carbon black catalyst were varied with the cobalt loading amount and the optimum loading content of cobalt was found 10wt%.

금속-프탈로시아닌 촉매의 물리.화학적 특성

서성규,윤형선 麗水大學校 産業基術硏究所 1999 産業基術硏究所 論文集 Vol.8 No.-

Physico-chemical properties of metal-phthalocyanines(PC) with several pretreatment conditions were characterized by TG/DTA, EA, UV-Vis, SEM and XRD analysis. Also, catalytic activities of metal-phthalocyanines with pretreatment conditions were examined by methanol combustion. The effect of pretreatment conditions on catalytic activity was discussed in this paper. The catalytic activity of metal-phthalocyanine pretreated with air and CH₃OH, mixture at 450℃ for 1hr was excellent. Under this pretreatment condition, the basic structures of Cu(α)-PC and Co-PC were destroyed, and formed a new metal oxides such as CuO and CO₃O₄, respectively. But Zn-PC was retained its basic structure in this pretreatment condition. The order of catalytic activity on methanol combustion was summarized as follow: Co-PC> Cu(α)-PC> Fe-PC> Zn-PC.

석유화학공단 지역의 대기중 황화합물에 관한 연구

서성규,김상채 國立 麗水大學校 環境問題硏究所 1998 環境硏究論文集 Vol.1 No.-

The odor of sulfur compounds which are of air pollutants in petroleum industrial complex was investigated. Concentration vs. peak areas resulted from analyzing four sulfur compounds within the ranges of very low concentration by GC method were correlated. Correlation coefficients of four sulfur compounds were found to be above 0.9941 and very good. No sulfur compounds exception hydrogen sulfide(H₂S) were detected at four measuring sites. Also, concentration of hydrogen sulfide was much lower than an emission standard(0.2ppm) within the industrial area. Concentration of hydrogen sulfide was insignificantly changed with times and sites of sampling. However, average concentration of hydrogen sulfide of #2 site was higher than other sites.

석유화학 BTX 공정 점토탑에서의 악취 및 공정 부식 방지에 관한 연구

서성규,정채훈,문정선 여수대학교 산업기술지역개발연구소 2000 産業基術硏究所 論文集 Vol.9 No.-

offensive odors affect man's olfactory sense and cause repulsiveness. In recent years, the problem of offensive odors is becoming more complicated and diversed. The emitted offensive odors from petrochemical BTX process gave rise to a serious corrosion problem of benzene tower and offensive odor problem. The main purpose in this study is to investigate process corrosion and odor generation from clay tower of petrochemical BTX process which were assumed to be the conversion of sulfur compounds over clay into hydrogen sulfide. As a result of this study, when traces of thiophenes and mercaptans are present in the clay tower, these components are broken down by the clay. The forming H□S in this step will be concentrated in the benzene tower top. In order to remove the occurred hydrogen sulfide, Fe-chelate catalyst is used. Removing efficiency is better than 99%.

자동차 폐촉매의 특성 및 VOCs 연소활성

서성규,문정선 麗水大學校 産業基術硏究所 1999 産業基術硏究所 論文集 Vol.8 No.-

The characterization of waste automotive catalyst was examined by EA(Elemental Analysis) and ICP-AES(Inductively Coupled Plasma-Atomic Emission Spectrophoto meter) analysis. The content of Pt, Pd and Rh in waste automotive catalyst was 1,228ppm, and 233ppm in Excel and 581ppm, 1,883ppm, and 255ppm in Pride. The combustion performance of waste automotive catalyst was investigated for acetaldehyde and toluene as a model VOCs in a fixed bed reactor at atmospheric pressure. The number of estimated waste automotive catalyst was 427,520 in 1997. Carbon deposit amount was higher in front brick than rear brick of catalyst, and increased with mileage. Catalytic activity of waste automotive catalyst for acetaldehyde and toluene combustion was very excellent, and decreased with mileage.

석유화학 공단 주변 지역 SO_(2)의 계절별 변화 예측

서성규,이선원,이상득,박종혁 國立 麗水大學校 環境問題硏究所 1999 環境硏究論文集 Vol.2 No.-

This study focuses on the assessment of long-term So_(2) concentration around the Yochon industrial complex area using ISCLT model. ISCLT model has been officially authorized by the U.S. EPA. Yochon industrial complex was located around Kwang-yang bay. In order to simulate the prediction of long-term So_(2) concentration by ISCLT model and the application in Yochon industrial complex area, every point source was identified and applicability to this region was studied in detail. Long-term meteorological data were analyzed from 1995 to 1998. As the result of verification and calibration for the model accuracy. the conversion factor was 8.35. According to the analysis from 1995 to 1988 meteorological data in Yochon, west north west(WNW: 13), north east north(NEN: 1), and south(s: 8) direction were identified to be the most frequently occurred one whit its frequency. As the result of modeling prediction, SO_(2) concentration in Yochon petroleum industrial complex area was satisfied to Air Quality Standards.

환경친화적 고체연료 개발 : 패각 및 석탄의 특성과 탈황반응

서성규,황원준 國立 麗水大學校 環境問題硏究所 2000 環境硏究論文集 Vol.3 No.-

In this study, characteristics of sea shell, coal and desulfurization have been investigated in order to examine the feasibility on the development of the clean solid fuel. Physico-chemical properties of waste sea shells and limestone have been characterized by using BET, XRD, and SEM. The main component of oyster shell was CaCO_(3) similar to limestone. After calcination of oyster shell, specific area decreased, and pore diameter increased. Under this experimental conditions, desulfurization efficiency of sea shells was the range of 49.1~61.7%. The desulfurizer capacity and efficiency of oyster shell were higher than others. The best fit desulfurization condition of oyster shell based on economy and desulfurization efficiency was as follows : particle size = 90~150㎛, and Ca/S =1.5~3.0. We can conclude that wasted sea shells can be used as a desulfurizer on the development of clean solid fuel

대학캠퍼스와 광양만 주변지역의 대기질에 관한 연구

서성규,이선원,문정선 國立 麗水大學校 環境問題硏究所 2000 環境硏究論文集 Vol.3 No.-

By the air quality standard of korea, the 7 major pollutants should be continuously monitored; that is SO_(2), NO_(2), O_(3), CO, PM10, TSP and Pb, At present, air monitoring system is furnished at 6 site around Kwangyang-bay which has been assigned to the air pollution special measure area as well as the air quality regulation area. According the measurement results of the university campus, the present levels of pollutants were not exceed the limit level of air quality standard, but the levels of some pollutants were high at special period of a day. It may be recommended to monitor continuously for the long-term. The monitoring results of SO_(2), NO_(2), O_(3) and CO showed that SO_(2), NO_(2) and CO level were well within the limit levels of air quality standard. The O_(3) levels were not exceed the limit levels of air quality standard, but high enough to concern based on one and eight hour average levels. Especially for monitoring data at Weollae-dong district The O_(3) levels were approaching the limit levels of air quality standard. The pattern of O_(3) and NO_(2) increase due to the photo-oxidation in the industrial district was not similar th that residential district

Metal separator의 자력개선과 자동차 연구

서성규,황원준,양병곤 여수대학교 산업기술지역개발연구소 2001 産業基術硏究所 論文集 Vol.10 No.-

The metal separators which are used at chemical plants and/or plastic powder manufacturing plants are to improve the productivity and reduce the inferiority of the materials and protect the machines so as to prevent the malfunction of the machines. The metal separators are divided according to the collecting methods as permanent magnet, electro magnet, supersonic waves and each method has advantages and disadvantages. The extensively spread metal separator is magnet type which has relatively low collecting ratio to 91%, but the facility cost is cheap and almost no annual operation cost with long average life span. The magnetic force intensity of the magnet bar surface can improve the efficiency of alien substance remove. The extensively used current permanent magnet type has the maximum 4000 gauss of surface magnetic force intensity. Recently a local company developed a maximum 8500 gauss of surface magnetic force intensity and supply to the local market with equal capacity to the imported one. But, the alien substance collected on the permanent magnet bar may be removed manually and it is required of magnetic force improvement and automation for process and economical efficiency. Therefore, the object of this research is to develop the magnetic force improved magnetic bar and automatic device for the collected alien substance removal, so improve the collecting ratio and the efficiency of the production process. We tested the optimized conditions by measuring the magnetic force of the permanent magnet bar according to the magnet location and size. As a result of this research, we developed a magnet bar with surface magnetic force intensity with maximum 8500 gauss. Also, we tried to check the possibility of the automation by testing of surface resin coating method for automation device development, researching the collecting capacity of alien substance and designing the stabilization of machine process structure.