• Title, Summary, Keyword: 활성탄소섬유

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Adsorption Characteristics of Multi-component VOCs Including Poorly Adsorbable Chemicals on Activated Carbonaceous Adsorbents (비흡착성 화합물을 포함하는 다성분 VOCs의 탄소흡착제 흡착특성)

  • Woo, Kwang Jae;Kim, Sang Do;Lee, Si Hyun
    • Korean Chemical Engineering Research
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    • v.45 no.3
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    • pp.277-285
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    • 2007
  • The adsorption characteristics of multi-component solvent vapors including poorly-adsorbable chemicals such as toluene-xylene-MEK and toluene-MEK-IPA on the activated carbonaceous adsorbents were investigated in a stainless steel fixed bed of 10.2 cm ID and 50 cm in height in order to identify those carbons for eliminating and recovering solvent vapors from industrial emission sources. The used activated carbonaceous adsorbents were pelletized commercial activated carbons and activated carbon fiber. Breakthrough curves and adsorption capacity at atmospheric pressures were obtained. It has been found that non-polar and larger molecules have been adsorbed better than polar and smaller molecules. In special, alcohols and ketones were poorly adsorbed caused by competitive adsorbability in multi-component mixture system. However, it could be overcome by profitable employment of organization of cooperative system which was composed of different porosity activated carbonaceous adsorbents appropriately.

Preparation of Densified ACFs for Electrodes of Electrical Double Layer Capacitor (전기이중층 캐패시터용 고밀도 활성탄소섬유 전극의 제조)

  • 최영옥;김종휘;양갑승
    • Proceedings of the Korean Fiber Society Conference
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    • pp.91-94
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    • 2003
  • 탄소재료는 높은 전기전도도 및 기계적 강도, 화학적 안정성, 큰 비표면적(1000~3000 $m^2$/g) 등의 특성 때문에 연료전지, 리튬이온 이차전지, 전기이중층 캐패시터(electric double layer capacitor, EDLC)의 전극활물질로 주목받고 있다[1]. 일반적으로 활성탄소섬유는 1000~3000 $m^2$/g의 비표면적을 갖기 때문에 종래의 필름 콘덴서와 세라믹 콘덴서에 비해 비약적인 고용량(체적당 수천 배, Farad급)을 얻을 수 있다. 전기이중층 캐패시터는 수명이 반영구적이며 사용온도의 범위가 넓고 안전하다는 장점을 지니고 있으며 이러한 캐패시터의 성능은 전극으로 사용되는 활성탄소 섬유의 비표면적, 세공의 크기, 구조 및 형태, 표면의 관능기 및 전기 전도도 등의 특성에 크게 좌우된다[1-3]. (중략)

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Influence of Activation Temperature on Surface and Adsorption Properties of PAN-based Activated Carbon Fibers/Phenolic Resin Matrix Composites (활성화 온도에 의한 PAN계 활성탄소섬유/페놀수지 복합재료의 표면 및 흡착특성)

  • 박수진;김기동;이재락
    • Polymer Korea
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    • v.24 no.1
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    • pp.97-104
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    • 2000
  • PAN-based activated carbon fibers/phenolic resin matrix composites (ACFCs) were manufactured via molding process with oxidized carbon fabrics (plain-type) and phenolic resin (resole-type) compounded by 70 : 30 wt%. The green body (as molded) was submitted to carbonization (at 100$0^{\circ}C$) in an inert environment and activation (at 700, 800, 900 and 100$0^{\circ}C$) in a $CO_2$ environment. In this work, the influence of activation temperatures was investigated in surface properties, such as pH, acid- and base-values by titration method, and in adsorption properties, i.e., specific surface area and pore structures by BET-method of the composites. Also, the pressure drops of the specimens were calibrated by ASTM. As a result, the activation temperature influenced the surface property of ACFCs. When the activation temperature was higher than 90$0^{\circ}C$, the surface was gradually developed in basic nature. And, the evolutions of specific surface area, total pore volume and pore size distribution of ACFCs could be easily confirmed the dependence on the activation temperature. Among them, well-developed pore structure from adsorption characteristics was changed of the ACFCs activated at 90$0^{\circ}C$. Also, the pressure drop was slightly decreased with increasing the temperature due to increasing the burn-off with heat treatment temperature of ACFCs.

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Adsorption Characteristics of Three-components Volatile Organic Compounds on Activated Carbonaceous Adsorbents (탄소흡착제에 의한 삼성분계 휘발성 유기화합물의 흡착특성)

  • Son, Mi Sook;Kim, Sang Do;Woo, Kwang Jae;Park, Hee jae;Seo, Man cheol;Lee, Si hun;Ryu, Seung Kon
    • Korean Chemical Engineering Research
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    • v.44 no.6
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    • pp.669-675
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    • 2006
  • Toluene of aromatic compounds, MEK of ketones and IPA of alcohols were extremely used as VOCs (Volatile Organic Compounds) on the getting into step with industrial process. The adsorption characteristics of three component solvent vapors (Toluene-MEK-IPA) on the activated carbonaceous adsorbents such as AC, ACF and AC+ACF were investigated in a stainless steel fixed bed adsorption experimental apparatus in order to identify those carbons for eliminating and recovering solvent vapors from industrial emission sources. The used activated carbonaceous adsorbents were pelletized commercial activated carbon and activated carbon fiber. The breakthrough curves and adsorption capacity have been obtained at atmospheric pressure in a adsorption fixed bed. It has been found that non-polar and larger molecules have been adsorbed better than polar and smaller molecules. Especially, alcohols and ketones were poorly adsorbed due to competitive adsorbability in ternary mixture system. However, it could be overcome by employment of activated carbonaceous adsorbent which have different porosity distribution appropriately.

Molecular Sieve Properties for $CH_4/CO_2$ of Activated Carbon Fibers Prepared by Benzene Deposition (벤젠 증착에 의해 제조된 활성탄소섬유의 $CH_4/CO_2$ 분자체 성질)

  • Moon, Seung-Hyun;Shim, Jae-Woon
    • Journal of Korean Society of Environmental Engineers
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    • v.27 no.6
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    • pp.614-619
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    • 2005
  • The activated carbon fibers of different surface area and pore structures were modified by carbon deposition from the pyrolysis of benzene, in an attempt to obtain carbon molecular sieves of high adsorption capacity and selectivity for the separation of $CO_2/CH_4$ gas mixtures. The ACFs molecular sieves prepared from different temperature and time were tested by the static adsorption of $CO_2$ and $CH_4$ gas, and their pore structures were characterized by the $N_2$ adsorption isotherms. We are able to prepare ACF molecular sieve with good selectivity for $CO_2/CH_4$ separation and showing acceptable adsorption capacities from the change of porosity by carbon deposition of pyrolyzed benzene.

The effects of carbon black addition in activated carbon fibers and surface treatment for controlled drug release in electro-responsive drug release system (전기 반응으로 약물방출 제어를 위한 활성탄소섬유의 표면처리 및 카본블랙 첨가 효과)

  • Kim, Min Il;Park, Mi-Seon;Lee, Sei Hyun;Lee, Young-Seak
    • Proceedings of the KIEE Conference
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    • pp.1544-1544
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    • 2015
  • 재료의 종류 및 특성에 따른 전기 반응 약물방출 특성을 확인하기 위하여 전압을 이용한 약물방출 시스템을 설계 하였으며 각각의 재료의 특성에 따른 약물방출 특성을 확인하였다. 약물방출은 활성탄소섬유에 친수성 관능기를 도입할 경우 방출되는 약물의 양이 37% 감소하였다. 한편 PVA에 카본블랙을 첨가하여 전도성을 향상 시킨 경우 11%의 약물만을 방출하던 PVA가 대부분의 약물(98%)을 방출하였다.

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Effect of Various Sizing Agents on the Properties of Nylon6/Carbon Fiber Composites Prepared by Reactive Process (다양한 사이징제가 반응중합에 의해 제조된 나일론 6/탄소섬유 복합체의 물성에 미치는 영향)

  • Park, Ha-Neul;Lee, Hak Sung;Huh, Mongyoung
    • Composites Research
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    • v.31 no.6
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    • pp.299-303
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    • 2018
  • In order to improve the interfacial bonding force and reaction polymerization degree of the carbon fiber reinforced nylon 6 composite material, the surface of the existing epoxy-sizing carbon fiber was desized to remove the epoxy and treated with urethane, nylon and phenoxy sizing agent, was observed. The interfacial bond strength of the resized carbon fiber was confirmed by IFSS (Interfacial Shear Strength) and the fracture surface was observed by scanning electron microscope. The results showed that the interfacial bonding strength of the carbon fiber treated with nylon and phenoxy sizing agents was higher than that of urethane - based sizing. It has been found that the urethane - type resizing carbon fiber has lower interfacial bonding strength than the conventional epoxy - sizing carbon fiber. This result shows that the interfacial bonding between carbon fiber and nylon 6 is improved by removing low activity and smoothness of existing carbon fiber.