고효율 충전탑에서 MEA 및 AMP 흡수제를 이용한 이산화탄소의 처리

김장호,김형호,강성진,김재홍,이경재 동아대학교 환경문제연구소 2003 硏究報告 Vol.25 No.2

In control technology of green house gas CO₂ exhausted, CO₂ recovery by chemical absorption technology is recommended. In application to a power station and industrial field with using the absorbent MEA and AMP for carbon dioxide removal. we used packing tower(D=0.l5m, H=1.05m) for experimental apparatus on the chemical absorbtion being used extensively as recovery technique of CO₂.

합성수지 충전물을 이용한 충전탑에서 암모니아 처리에 관한 연구

김장호,김형호,김종수,김재홍,이경재 동아대학교 환경문제연구소 2003 硏究報告 Vol.25 No.2

In this study, packed column was chosen so as to remove ammonia gases, kinds of odor generated from industrial fields. Random packing 35mm Pallring pp., that is suitable for the environmental protection industry, was used because the packings are comparatively simple and easy to manufacture. Random packings 35mm Pallring, PP. has a form of lattice as plastic(po1ypropylene). By studying the characteristics for packing by experiment of dry pressure drop, hydraulic pressure drop, liquid hold-up and mass transfer, packed column is made as 300 [mm] in diameter, 1400 [mm] in height, the applicable criteria to the noxious gas treatment process was presented as follows.

고효율 충전탑에서 유해가스처리

김장호,김형호,김종수 동아대학교 환경문제연구소 2001 硏究報告 Vol.24 No.2

In control technology of green house gas CO₂ exhausted, CO₂recovery by chemical absorption technology is recommended. In application to a power station and industrial field with using the absorbent MEA and AMF for carbon dioxide removal. we used packing tower(D=0.l5m, H=1.05m) for experimental apparatus on the chemical absorbtion being used extensively as recovery technique of CO₂. The pressure drop of structured packing Mellapak N. 250Y and random packing 25mm Pall nng was 5.2, 8.5 [mm H₂O/m in the gas capacity factor [kg^(1/2) m^(-1/2) s^(-1)]. Metallic Ralu-Pack 250YC, however, structured packing. has recently being used in petrochemical production plant in general. The decision of tower height depends on the number of transfer unit(NTU) and HTU influence on liquid distribute. If liquid flow is not good material separation, it is bad and usually occurs in the foolding point. In the normal condition, new systematic understanding is given on metal Ralu-Pack 250 YC.

Nylon 6 fiber media를 이용한 Biofilter의 VOCs(Toluene)의 제거

김장호,최동훈,김종수,김형호,장봉수 동아대학교 환경문제연구소 2002 硏究報告 Vol.25 No.1

This study was investigated the application and kinetics of biofiltration using cometabolic process to remediate gaseous toluene that are highly recalcitrant to adsoption and biodegradation. Biofiltration was successfully applied to treat amixture of volatile organic compounds(Toluene) from contaminated air stream. Immobilized Ps.oleovorans biofilter was evaluated for its value in simultaneous removal of Toluene from waste air stream. In the loading rate (1,000ppm) and space velocity(1,200hr). the average removal efficiencies of Toluene were 33.7%. and CO2 production rate were 5.28㎎/hr

흡수에서 합성수지 충전물(Nor-Pac, 25mm)로부터 분리작용의 연구

김장호,김재홍,김종수,김형호 동아대학교 환경문제연구소 2002 硏究報告 Vol.25 No.1

This study was carried out to demonstrate the superiority of used packing in view of energy saving and efficiency of mass transfer, comparing with conventional packing. The results are as follows 1. Owing to low pressure drop under high load, 25mm NSW-ring, pp. can cause energy saving. 2. The unique magnitudes of used packing are as follows : C_(G) = 5.78 m = 0.67 n = 0.46 3. Used packing can make high efficiency including energy saving because of low pressure drop per the number of transfer unit. To rate the characteristic of packing, it should be carried out that the measurement of pressure drop per packing height and per the number of transfer unit. This study demonstrated the superiority of used packing by caning out above experiment and could be used as basic reference for design and predicting efficiency of packing tower which is filled with same packing.

바이오필터에 의한 VOCs의 제거에 대한 연구

김장호,김옥택,안종수,김종수 동아대학교 환경문제연구소 2001 硏究報告 Vol.24 No.1

Biofiltration was successfully applied to treat amixture of volatile organic compounds(Benzene, Xylene) from contaminated air stream. Immobilized Ps.oleovorans biofilter was evaluated for its value in simultaneous removal of B.X from waste air stream. The variety of operating conditions were tested to evaluated important factors such as space velocity, PH, water content, ect. In the loading rate(1,000ppmv) and space velocity(l,200hr), the average removal efficiencies of B.X. were 39.3% and 30.5% and CO₂ production rate were 6.72 mg/hr, 4.65mg/hr, respectively. Removal efficiency of B.X. mixture was lower than it's each individual at same loading rate. When the concentrations of B.X. mixture were controlled 300ppmv and 900ppmv at two stages reactor, the average outlet concentration were 7.lppmv, 184.5ppmv and CO₂ production rate were 6.04mg/hr, 12.6mg/hr, respectively.

모바일 산업의 현황과 활성화 방안에 관한 연구

김장호 한국통상정보학회 2003 통상정보연구 Vol.5 No.2

The computer was only used to calculate and solve the mathematical problems, to send the simple data, and to exchange the text based informations in the early 1990's. But nowadays, computer technology give us the chance to exchange digital goods and services, etc. And more, computer and computer based systems can be applied everywhere, for example, it can be used at office, at home, and at school. Most of all, one of the remarkable changes is the development of mobile industry, which can be applied anywhere and anytime. So, this study focused on the current situation and promotion plans of the mobile industry. Mobile is based on the IT, IT and mobile technology are the foundation stone of ubiquitous computing environments. Accordingly, this thesis analysis the meaning of ubiquitous, the meaning and roll of mobile industry. With the analysis of this, the conclusion is that to develop and success the new business model at home and overseas, the cooperation of government section and industry section is the mast import thing to make it out.

韓國企業의 賃金體系 : 賃金의 決定基準 및 支給形態의 職種別差別을 中心으로 with special reference to the occupational difference in the process of wage determination and in the way of wage payment

金章鎬 淑明女子大學校 1988 論文集 Vol.29 No.-

This paper investigates empirically the characteristic features of the wage system in the Korean private business sector. In particular, the paper is concerned with the occupational difference in the process of wage determination and in the method of wage payment. The empirical investigation relies mazily upon the data source which is obtained from both the various existing plant-level sample survey results about Korean wage system and the wage tables of the several individual business establishments. The main empirical findings of the study are as follows. In the first, in the process of wage determination worker's charateristics including years of schooling, period of job tenure and sex difference are much more important factors than job characteristics, even though the Korean wage system seems superficially to be a system in which job characteristics are regarded importantly. Secondly, there are several important differences between the wage system for the blue-collar worriers and one for the white-collar workers particularly in the method of wage payment and the structure of job ladders. This occupational difference in wage determination is one of the important reasons for the existence of a big earnings gap between these two kinds of The worker groups. But it is difficult to find out any rational economic reasons why this kind of differentiation prevails in Korea except the reasons caused to custom and cultural tradition. In conclusion, the empirical evidence of the paper suggests that these kinds of factors originated mainly from custom and tradition should be eliminated in order to increase labor market efficiency and to enhance the equity in earnings distribution.

충진탑에서의 흡수와 수력학적 특성연구

김장호 동아대학교 환경문제연구소 1992 硏究報告 Vol.15 No.2

This reseach has been carried out to confirm hydraulic character and mass transfer in packing column with lattice structure packings and arranged at random. Three different system : NH₃-Air/H₂O, SO ₂-Air/NaOH, NH₃-Air/H₂SO₄ was adopted for the expermiments Latties paking Compare with conventional packing was proved low presure and high separation efficiency for high loading per tans unit. And an inflow material tested for absorption and rectification, it made an experiment under a range regular teperature, low energy and small amount of money. That made possible in simple equation, volume material transfer coefficient β_(L)·a by absorption or β_(v)·a calaculated in all range loading. The peculiarity pressure loss ∠ P/NTU_(ov) for Hiflow-ring contributed to a fall in cost of energy, a grade number of a vacuum rectification and absorption calculation.

希臘悲劇에 있어서의 CHOROS 硏究

김장호 仁川敎育大學校 初等敎育硏究所 1971 교육논총 Vol.2 No.-