• Title, Summary, Keyword: activated carbon

Search Result 1,993, Processing Time 0.04 seconds

Physical and Mechanical Properties of Porous Concrete Using Waste Activated Carbon (폐활성탄을 사용한 다공성 콘크리트의 물리.역학적 성질)

  • Youn, Joon-No;Sung, Chan-Yong;Kim, Young-Ik
    • Journal of The Korean Society of Agricultural Engineers
    • /
    • v.51 no.4
    • /
    • pp.21-27
    • /
    • 2009
  • This study was performed to evaluate the physical and mechanical properties of porous concrete using waste activated carbon. Material used were ordinary portland cement, recycled coarse aggregate, waste activated carbon and superplasticizer. The replacement ratios of waste activated carbon were 0,1,2,3,4,5,6,7,8,9, and 10 %. The void ratio was decreased and ultrasonic pulse velocity was increased with increasing the waste activated carbon powder, respectively. The compressive strength and flexural strength of porous concrete using waste activated carbon powder were in the range of 8.21${\sim1}$6.58 MPa and 1.69${\sim1}$3.68 MPa, respectively. The pH degree of porous concrete in 1day and 77days were shown in 12.50${\sim1}$12.63 and 10.21${\sim1}$10.70, respectively. Accordingly, waste activated carbon can be used for porous concrete material.

Deodorization of Non-woven Fabrics Bonded with Activated Carbon (활성탄 함유 부직포의 소취성 평가)

  • Jeong, Dong-Seok;Chun, Tae-Il
    • Textile Coloration and Finishing
    • /
    • v.27 no.1
    • /
    • pp.50-61
    • /
    • 2015
  • The merits of activated carbon for removal of organic compounds have been well known in the various industrial fields. Fixing methods with activated carbon in the non-woven fabric have the advantages of fast adsorption and ease of handling when compared with bonding and coating methods. In this study, we have examined deodorization of non-woven fabrics fixed with activated carbon. We have been tested the deodorization of various kinds activated carbon and non-woven fabric structures. The effective mixing ratio of activated carbon was 5% on the weight of fabrics, which are closely related to the fabric structure. The activated carbon with higher mesh size show the better deodorization effect.

The Effect of Potassium Hydroxide on the Porosity of Phenol Resin-based Activated Carbon Fiber

  • Jin, Hang-Kyo
    • Carbon letters
    • /
    • v.7 no.3
    • /
    • pp.161-165
    • /
    • 2006
  • Activated carbon fiber could be prepared at 973 K by catalytic activation using potassium hydroxide. Phenol resin fiber (Kynol) was impregnated with potassium hydroxide ethanol solution, carbonized and activated at 973 K, resulting in activated carbon fibers with different porosities. The potassium hydroxide accelerated the activation of the fiber catalytically to form narrow micropore preferentially in carbon dioxide atmosphere. The narrow micropore volume of 0.3~0.4 cc/g, total pore volume of 0.3~0.8 cc/g, mean pore width of 0.5~0.7 nm was obtained in the range of 20~50% burnoff.

  • PDF

Zeta-potentials of Oxygen and Nitrogen Enriched Activated Carbons for Removal of Copper Ion

  • Park, Kwan-Ho;Lee, Chang-Ho;Ryu, Seung-Kon;Yang, Xiaoping
    • Carbon letters
    • /
    • v.8 no.4
    • /
    • pp.321-325
    • /
    • 2007
  • The oxygen and nitrogen enriched activated carbons were obtained from modification of commercial activated carbon by using nitric acid, sodium hydroxide and urea. Zeta-potentials of modified activated carbons were investigated in relation to copper ion adsorption. The structural properties of modified activated carbons were not so much changed, but the zeta-potentials and isoelectric points were considerably changed. The zeta-potential of nitric acid modified activated carbon was the most negative than other activated carbons in the entire pH region, and the $pH_{IEP}$ was shifted from pH 4.8 to 2.6, resulted in the largest copper ion adsorption capacities compare with other activated carbons in the range of pH 3~6.5. In case of urea modified activated carbon, copper ion adsorption was larger than that of the as-received activated carbon from pH 2 to pH 6.5 even though the $pH_{IEP}$ was shifted to pH 6.0, it was due to the coordination process operated between nitrogen functional groups and copper ion. The adsorption capacity of copper ion was much influenced by zeta-potential and $pH_{IEP}$ of carbon adsorbent.

Effect of Temperature on the Adsorption and Desorption Characteristics of Methyl Iodide over TEDA-Impregnated Activated Carbon

  • Park, Geun-Il;Kim, In-Tae;Lee, Jae-Kwang;Ryu, Seung-Kon;Kim, Joo-Hyung
    • Carbon letters
    • /
    • v.2 no.1
    • /
    • pp.9-14
    • /
    • 2001
  • Adsorption and desorption characteristics of methyl iodide at high temperature conditions up to $250^{\circ}C$ by TEDA-impregnated activated carbon, which is used for radioiodine retention in nuclear facility, was experimentally evaluated. In the range of temperature from $30^{\circ}C$ to $250^{\circ}C$, the adsorption capacity of base activated carbon decreased sharply with increasing temperature but that of TEDA-impregnated activated carbon showed higher value even at high temperature ranges. Especially, the desorption amount of methyl iodide on TEDA-impregnated carbon represented lower value than that on unimpregnated carbon. The breakthrough curves of methyl iodide in the fixed bed packed with base carbon and TEDA-impregnated activated carbon at high temperature were compared. TEDA-impregnated activated carbon would be applicable to adsorption process up to $150^{\circ}C$ for the removal of radioiodine in a nuclear facility.

  • PDF

Adsorption Characteristics of Ammonia, Hydrogen Sulfide and Methylmercaptan on Activated Carbons with Different pH (활성탄의 pH에 따른 Ammonia, Hydrogen Sulfide 및 Methylmercaptan 흡착 특성)

  • 김정열;신창호;서문원;김종열;김영호;이근회
    • Journal of the Korean Society of Tobacco Science
    • /
    • v.19 no.1
    • /
    • pp.46-50
    • /
    • 1997
  • The pH of coconut based activated carbon was changed by treating with NaOH and HNO3 and we have calculated the adsorption amounts of ammonia, hydrogen sulfide and methylmercaptan on the activated carbons using the break-through time which was obtained from break-through curve experiments. As a result of this study, the adsorption amounts of ammonia Has on the activated carbons were 2,6 mg/g, 17.2 mg/g and 31.6 mg/g with the pH 11, pH 7 and pH 3, respectively. These results indicated that the adsorption ability of ammonia on activated carbon was increased with decreasing the pH of activated carbon. Otherwise, in the cases of the adsorption experiment of hydrogen sulfide and methylmercaptan on the activated carbons with different pH. the activated carbon with pH 11 showed higher adsorption capacity than the activated carbons with pH 7 and pH 3. The adsorption amounts of hydrogen sulfide and methylmercaptan were 39.9 mg/g and 178 mg/g with pH 11, respectively. Finally, we analyzed the amount of ammonia delivered from 88 Lights cigarette made of triple filter which contained the activated carbon. The amount of ammonia delivered to smoke from the filter cigarette containing the activated carbon with pH 3 was 45.1${\mu}g$/cig. This value was lower 23.8 % than that from the activated carbon with the pH 11.

  • PDF

Effect of Activated Carbon on Growth of Agastache rugosa in Greenhouse

  • Choi Seong-Kyu;Park Yeong-Tyae;Yang Deok-Chun
    • Plant Resources
    • /
    • v.8 no.2
    • /
    • pp.171-174
    • /
    • 2005
  • This study was conducted to investigate the effect of activated carbon on leaf and stem production of Agastache rugosa as affected by different amounts of activated carbon. The results obtained are summarized as follows. Growth characteristics including plant height and leaf length were the highest when activated carbon added with $10\%$, suggesting that optimum amount of activated carbon was ranged from 10 to $20\%$. Growth and enlargement of the root were improved by $10\%$ AC. Activated carbon can be utilized as a soil conditioner in agricultural crop areas.

  • PDF

Characterization of composite prepared with different mixing ratios of TiO2 to activated carbon and their photocatalytic activity

  • Chen, Ming-Liang;Bae, Jang-Soon;Ko, Young-Shin;Oh, Won-Chun
    • Analytical Science and Technology
    • /
    • v.19 no.5
    • /
    • pp.376-382
    • /
    • 2006
  • In this work, pitch/activated carbon/$TiO_2$ composite were prepared by $CCl_4$ solvent method with different mixing ratios. The BET surface area of pitch/activated carbon/$TiO_2$ composite has a significantly increase with increasing activated carbon content in pitch/activated carbon/$TiO_2$ composite. The surface structure and elemental compositions of the composite were studied by SEM and EDX, respectively. The SEM results were presented to the characterization of porous texture on the pitch/activated carbon/$TiO_2$ composite. And EDX data was shown the presence of C, O, S, Ti and other elements. The structural properties of the composite were studied in XRD measurements. The $TiO_2$ crystal phases of the pitch/activated carbon/$TiO_2$ composite had lots of rutile-type structure which transforms from anatase-type with a little of anatase-type structure. The photocatalytic activities of the composite were evaluated using a photo-decomposition method under UV lamp. The pitch/activated carbon/$TiO_2$ composites were observed better photocatalytic activity than that of pristine $TiO_2$.

Effect of Activated Carbon on Growth of Ginger (Zingiber officinale)

  • Choi Seong-Kyu;Park Young-Tae
    • Plant Resources
    • /
    • v.8 no.1
    • /
    • pp.44-47
    • /
    • 2005
  • Activated carbon(AC) can be utilized as a soil conditioner in agricultural crop areas. This study was conducted to investigate the effect of AC on growth and yield of Ginger(Zingiber officinale) as affected by different amounts of AC. The results obtained are summarized as follows. Growth characteristics including plant height and leaf length were the highest when activated carbon added with $5-10\%$, suggesting that optimum amount of activated carbon was ranged from 5 to $15\%$. Growth and enlargement of the root were improved by $10\%$ AC with higher rhizome length and weight.

  • PDF

Leaf and Stem Production of Angelica acutiloba by Activated Carbon in Green House

  • Choi Seong-Kyu;Park Young-Tae
    • Plant Resources
    • /
    • v.8 no.1
    • /
    • pp.71-74
    • /
    • 2005
  • Activated carbon(AC) can be utilized as a soil conditioner in agricultural crop areas. This study was conducted to investigate the effect of AC on Leaf and Stem Production of Angelica acutiloba as affected by different amounts of AC. The results obtained are summarized as follows. Growth characteristics including plant height and leaf length were the highest when activated carbon added with 10, suggesting that optimum amount of activated carbon was ranged from 10 to $20\%$. Growth and enlargement of the root were improved by $10\%$ AC.

  • PDF