• Title/Summary/Keyword: Absorbent

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첨단기술

  • Korean Federation of Science and Technology Societies
    • The Science & Technology
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    • v.17 no.9 s.184
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    • pp.46-48
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    • 1984
  • 생체고분자재료 (Bio-Polymeric Material) / 우라늄흡착재 (Uranium Absorbent) / 인조다이아몬드(Synthetic Diamond)

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Membrane contactor and Carbon Dioxide Separation

  • 이규호
    • Proceedings of the Membrane Society of Korea Conference
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    • 2002.07a
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    • pp.59-101
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    • 2002
  • PVDF is good material for a hollow fiber membrane with high porosity and excellent hydrophobicity. Asymmetric PVDF hollow fiber membranes were prepared by the Loeb-Sourirajan phase inversion method. Asymmetric PVDF hollow fiber membranes could be controlled in pore size and porosity using various additives(LiCl, ZnCl$_2$) and internal coagulants (water, EtOH/water, and DMAc/water mixture). $CO_2$removal efficiency of asymmetric PVDF hollow fiber membranes was 1.2 times high than that of commercialized PP hollow fiber membranes at MEA 5wt% solution. $CO_2$flux of asymmetric PVDF hollow fiber membranes was 2.5 times higher than that of commercialized PP hollow fiber membranes. $CO_2$removal efficiency and absorption rate of asymmetric PVDF hollow fiber membranes were 30 times higher than those of packed column at absorbent $H_2O$. $CO_2$flux of asymmetric PVDF hollow fiber membranes at MEA 5wt% solution was 48 times higher than that of pure water. In the case of MEA 5wt% solution used as an absorbent, the $CO_2$absorption rate and removal efficiency of PVDF hollow fiber membrane were 2.3 times higher than that of a packed column.

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Sewage Treatment Characteristics and Efficiencies of Absorbent Biofilter Systems (흡수성 바이오필터 시스템의 오수처리 특성 및 효율)

  • Cheon, Gi-Seol;Kwun, Soon-Kuk;Kim, Song-Bae
    • Journal of The Korean Society of Agricultural Engineers
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    • v.46 no.5
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    • pp.131-139
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    • 2004
  • In this study, on-site sewage treatment tests were conducted using the Absorbent Biofilter System (ABS) under different hydraulic loading rates to examine its treatment characteristics and efficiencies and to determine its feasibility as a small on-site sewage treatment system in a rural area. Results showed that the removal rates of BOD and SS were satisfactory at hydraulic loading rates of 100~150 cm/day, meeting the Korean effluent water quality standards for the riparian zone (10 mg/L). In the case of nutrients (N, P), however, the system did not perform well, necessitating further improvement for nutrient removal. A comparative analysis indicated that as a small on-site sewage treatment system, the ABS would be more suitable than other treatment systems in terms of performance stability, maintenance requirement, and cost-effectiveness and could be applied as an alternative treatment system in Korean rural areas.

Numerical Analysis of Heat and Mass Transfet in the Absorbent By Surfactant Addition (계면활성제첨가에 의한 흡수용액내의 열 및 물질이동해석)

  • ;;Heo Boo, Back Mok
    • Journal of the Korean Society of Safety
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    • v.6 no.3
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    • pp.40-49
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    • 1991
  • To better understand the phenomena inside an absorber, where heat and mass transfer coexist, this study selected the most baslc absorption model from in whifh water vapor is absorbed on the surface of a stationary lithium bromide absurbent solution. The purpose of this study is to obtain basic knowledge of heat and mass transfer processes as affected by Marangoni convection induced by addition of surfactant. We apply a non-flowing bulk absorption model and assume that dropwise surfactant is fixed on the absorbent surface. Four governing equation-continuity, laminar monentum, energy and diffusion are solved numerically to obtain temperature and concentraion distributions during steam absorption with Marangonl convection.. In conclusion, Sh and Nu genrally increase at the initial absorption stage.

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A Study on Acustic absorption Efficiency of Vacuum cleaner by Kind of Acustic absorbent (흡음재의 종류에 따른 진공청소기의 흡음성능 특성 연구)

  • Kim, J.H.;Cho, T.J.;Jeong, J.W.;Choi, M.J.;Lee, S.G.
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2007.05a
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    • pp.687-692
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    • 2007
  • Vacuum cleaner, one of those household articles, have easily used in our life. Recently vacuum cleaner tends to be compact and portably with high suction power and low noise. As increasing this suction power, the vibration and noise of vacuum cleaner become important problem. To reduce noise efficiently, it is important to identify the noise and the vibration. This pater is to characterize the noise and vibration of a vacuum cleaner.

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A Preliminary Study on the In-line Concentration Measurement of Absorbent Solution (흡수용액의 In-line 농도측정을 위한 기초연구)

  • 민병혁;황덕용;정시영;구기갑
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.15 no.2
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    • pp.152-158
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    • 2003
  • Titration method is one of the widely used methods for the concentration measurement of absorbent ammonia/water. However, this method is inconvenient because the solution should be extracted for the measurement. Moreover, significant error can be introduced by the evaporation of ammonia during the sampling and measuring procedure. In this study a reliable in-line concentration measurement method was proposed. To prove the validity of the concept, a measuring apparatus was designed, built, and tested with water. It is found that the location of flow inlet and exit is important in the measurement accuracy. The flow inlet and exit located in the middle of the test cell showed the best result. By the error analysis, it is expected that the ammonia concentration can be measured within the error of $\pm$0.18% assuming the error of 0.1 K in temperature measurement and 0.1 g in weight measurement.

Novel Recycling Technology of Ultra-fine Fibrous Materials

  • Kim, Seong-Hun;Oh, Kyung-Wha;Lee, Shin-Kyung
    • Proceedings of the Polymer Society of Korea Conference
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    • 2006.10a
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    • pp.209-209
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    • 2006
  • Ultra-fine fibers are spun by expensive fiber spinning technology using special spinnerets. Ultra-fine fibrous materials have attracted considerable attentions because of their potential applications as high performance wiping cloths, water absorbent sound proofing materials and moisture transfer sporting good. However, production expense of ultra-fine fibers is 5 to 7 times higher than general textile materials. The objective of this research is to develop cost-effective recycling process to produce multi-functional ultra-fine fibrous material in terms of the development of garnetting and carding machines for ultra-fine fibrous material waste and scrap. The efficiency of sound absorption for the recycled polyester nonwoven increased with decreasing length and thickness of component fibers, which was attributed to the reduction of air permeability. It is expected that high value and cost-effective textile products are developed using ultra-fine fibrous wastes and that sound proofing material and oil absorbent f

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