• Title/Summary/Keyword: 폐활성탄

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상수처리공정에서 사용된 폐활성탄의 재생 특성

  • 박남규;강경연;정재현;류병순;송승구
    • Proceedings of the Korean Environmental Sciences Society Conference
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    • 2002.05b
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    • pp.256-259
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    • 2002
  • 3종의 폐활성탄 재생실험 결과 중국산 석탄계 폐활성탄의 재생성능이 뛰어난 것으로 사료되었다. 요오드가가 각 재생 온도별로 950을 모두 넘었으며 수율 역시 94% 이상으로 가장 높은 것으로 나타났다. 반면 노리트 석탄계 폐활성탄은 재생을 하여도 요오드가 900을 넘기지 못하는 것으로 나타났다. 3종의 폐활성탄 재생에서 가장 효율적인 재생온도는 800~$900^{\circ}C$일 때 평균적으로 가장 좋은 요오드가를 나타내었으나 수율은 재생온도가 높을수록 낮게 나오는 것으로 나타났다. 하지만 800~$900^{\circ}C$에서의 수율 역시 90%를 넘는 것으로 보아 수율에서 큰 문제가 되지는 않을 것으로 사료된다.

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The Effect of Activated Charcoal on Growth and Yield in Bupleurum falcatum (시호(Bupleurum falcatum)의 생육과 생산성에 미치는 폐활성탄의 효과)

  • 최성규
    • Korean Journal of Plant Resources
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    • v.16 no.2
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    • pp.130-133
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    • 2003
  • This study was conducted to investigate the effect of activated charcoal on growth and yield of taro in different degree of activated charcoal concentration. The results obtained are summarized as follows. Stem length was shown the longest in activated charcoal of 10-20%, but shorter in control. Also stem diameter was shown the thickest in activated charcoal of 10-20%, but thinner in control. Length of main root and thickness of main root were good in activated charcoal of 10-20%. Quality and yield of Bupleurum fatcatum was the highest in activated charcoal of 10-20%. Therefore, optimum consistency of activated charcoal was 10-20%.

Characteristics of Low Temperature Desorption of Volatile Organic Compounds from Waste Activated Carbon in Cylindrical Cartridge (원통형 활성탄 카트리지 내 폐활성탄의 휘발성 유기화합물 저온 탈착 특성)

  • Kang, Sin-Wook;Lee, Seongwoo;Son, Doojeong;Han, Moonjo;Lee, Tae Ho;Hong, Sungoh
    • Clean Technology
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    • v.27 no.1
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    • pp.79-84
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    • 2021
  • In this study, the waste activated carbon used in the painting process was filled into a cylindrical cartridge and the characteristics of desorption by low temperature gas were investigated. Adsorption and desorption experiments of toluene with activated carbon were conducted to determine the flow rate of desorption. In an experiment where desorption was performed while changing conditions at flow rates of 1, 2 and 4 ㎥ min-1, it was determined that 2 ㎥ min-1 was appropriate due to the high THC concentration and desorption time. In the early stage of the desorption of waste activated carbon, 2-butanone and MIBK (methyl isobutyl ketone) with a low boiling point were generated at a high rate in the gas component, and after that, the concentration of THC decreased and the BTX was desorbed at a high rate. The total calorific value of the gas component generated during the desorption of waste activated carbon was 316 kcal kg-1. From repeating the regeneration of waste activated carbon with toluene five times, it was observed that the iodine value and the specific surface area were relatively lower than that of new activated carbon. In the desorption experiment where two cylindrical cartridges were connected in series, the maximum THC concentration was about 470 ppm.

A Study on the Explosion Riskiness with Flying of Activated Carbon (활성탄의 부유중 폭발 위험성에 관한 연구)

  • 김정환;현성호;이창우;함영민
    • Fire Science and Engineering
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    • v.12 no.3
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    • pp.3-9
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    • 1998
  • We investigated the weight loss according to temperature using TGA in order to find the thermal hazard of brand-new activated-carbon and disused activated-carbon dusts, and the properties of dust explosion in variation of the specific surface area of their dust with the same particle size. Using hartman's dust explosion apparatus which estimate dust explosion by electric ignition after making dust disperse by compressed air, dust explosion experiments have been conducted by varying concentration and size of activated carbon dust. The explosion pressure of both activated carbon increased as the specipic surface area increased. The results indicated that brand-new activated-carbon of which specific surface area was larger three to four times than that of disused activated-carbon was much easier of dust explosion.

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A Study on Fuel Characteristics of Mixtures Using Torrefied Wood Powder and Waste Activated Carbon (반탄화 목분과 폐활성탄 혼합물의 복합연료활용을 위한 연료적 특성에 관한 연구)

  • Lee, Chang Goo;Kang, Seog Goo
    • Journal of the Korean Wood Science and Technology
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    • v.43 no.1
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    • pp.135-143
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    • 2015
  • This study evaluated fuel properties of composite materials which were prepared by mixing a waste activated carbon from the used purifier filter with torrefied wood powder. Wood species of the raw material of torrefied wood powder are oak wood (Quercus serrata Thunb. ex Murray) and pine wood (Pinus densiflora Siebold & Zucc). And the treatment conditions used for this study were 300 s, 450 s, and 600 s at $200^{\circ}C$ for the wood roaster. Also, the mixing ratios are 5 : 95, 10 : 90, 15 : 85, 20 : 80, 40 : 60, 60 : 40 and 80 : 20 (waste activated carbon : torrefied wood powder). The fuel properties such as highly heating value (HHV), elementary analysis and ash content were evaluated. The results obtained are followings; 1. Despite the same treatment condition of wood roasting, pine wood has higher carbon contents than oak wood. Therefore, pine wood indicated the optimum carbonization at low temperature and short treatment times. 2. The gross calorific value and ash content increased as the mixing ratio of waste activated carbon increased. 3. Mixtures of the waste activated carbon and torrefied wood powder showed greater gross calorific value than those of the mixtures of waste activated carbon and the untreated wood powder. Also, the pine wood resulted in higher heating value that thaose of the oak wood. 4. When composite fuels that were composed waste activate carbon and wood powder are used, higher temperature conditions are required because the combustion is incomplete at $800^{\circ}C$ and 4 hours. 5. The increasing rate of the gross calorific value of mixtures of waste activated carbon and untreated wood powder is higher than does the mixtures of waste activated carbon and torrefied wood powder. Also, this phenomenon is more obvious for pine woods. Therefore, an optimal mixing ratio of waste activated carbon was determined to be between 5% and 10% (wt%). Also, this condition satisfied the requirement of the No.1 grade of wood pellet.

Investigation on Desorption Reaction and Heating Value of Used Activated Carbons Collected from VOC Adsorption Towers (휘발성 유기화합물 흡착탑 폐활성탄의 탈착반응 및 열량특성 연구)

  • Yoon, Sung-Min;Kim, Joo-Yeon;Park, Kun-Yik;Yoon, Soo-Kyung;Kil, In-Sub;Park, Hui-Jae;Rhee, Young-Woo
    • Clean Technology
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    • v.16 no.1
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    • pp.33-38
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    • 2010
  • The characteristics of desorption reaction and the heating values of used activated carbons collected from the companies of Shiwha/Banwal industrial complex were investigated. The desorption characteristics of used activated carbons were analyzed based on the data obtained from a thermogravimetric analyzer. The activation energies and reaction orders for desorption reaction of used activated carbons were calculated by employing Freeman-Carroll method. Heating values of volatile organic compounds(VOC) desorbed from used activated carbons were estimated based on the data obtained from a total hydrocarbon analyzer. It was found that the reaction orders of desorption of used activated carbons were 0.1~0.8, their desorption activation energies, 6.9~26.4 kJ/mol, and VOC heating values, 0.4~10.7 kcal/kg.

Investigation on Desorption Characteristics of VOCs Adsorbed on used Activated Carbons Collected from Painting Process (도장공정에서 수거한 폐활성탄에 흡착된 VOCs의 탈착특성 연구)

  • Kim, Joo Yeon;Yoon, Sung Min;Park, Kunyik;Yoon, Soo Kyung;Kil, In Sub;Park, Hui Jae;Rhee, Young-woo
    • Korean Chemical Engineering Research
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    • v.48 no.6
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    • pp.752-756
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    • 2010
  • Desorption reaction characteristics of the used activated carbons collected from painting process in Shiwha/Banwal industrial complex were investigated. Thermogravimetric analyzer was used to investigate the desorption characteristics. Activation energies and reaction orders for desorption reaction characteristics of used activated carbons were estimated by employing Friedman method and Freeman-Carroll method. In the used activated carbons collected from painting process, it was found that the activation energies were 20.6~43.2 kJ/mol in Friedman method and 12.3~26.5 kJ/mol in Freeman-carroll method, and reaction orders were 0.1~1.7.

Characteristic recovery of active carbon waste treated by microwave (Microwave에 의한 정수장 폐활성탄의 복원 특성)

  • Lee, Bum-Suk;Kim, Taik-Nam;Kim, Jong-Ock
    • The Journal of Engineering Research
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    • v.4 no.1
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    • pp.93-107
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    • 2002
  • The active carbon waste which was used in water purification plant was investigated for the improvement of capillary after microwave treatment. The variation of surface area was measured with the various kinds and amounts of active carbon. The water vapor as the activator was verified to improve the capillary but it reacted with the water contained in waste active carbon. In contrast to the water vapor, the $CO_2$ gas improved the surface area about 10-20 % compared to as received one. The best results was observed at the intensity of 2.75 kw microwave. The more effective recovery of active carbon waste was observed at the microwave treatment compared to the rotary kiln treatment. However, the mass production is so difficult in the microwave process.

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