휘발성 유기용제가 흡착된 흡착제의 초임계 이산화탄소를 이용한 재생특성

이승범; 성대형; 홍인권

Journal of the Korean Industrial and Engineering Chemistry, Vol.8, No.5, 737-741, October, 1997

Export Citation

휘발성 유기용제가 흡착된 흡착제의 초임계 이산화탄소를 이용한 재생특성

Regeneration Characteristics of Adsorbent Loaded with VOCs using Supercritical Carbon Dioxide

이승범, 성대형, 홍인권

초록

휘발성 유기용제의 주된 제거방법은 흡착제를 이용한 흡착 공정이 추천된다. 본 연구에서는 입성활성탄과 활성탄소섬유에 휘발성 유기용제를 흡착시킨 후 폐흡착제를 탈착컬럼에 넣고 318.15 K의 온도에서 압력을 변수(2000∼3000 psi)로 하는 초임계 이산화탄소를 이용하여 재생하였다. 초임계 이산화탄소의 압력이 증가함에 따라 탈착율과 요오드 흡착가는 증가하였으며, 재생시간은 MEK와 benzene의 경우 각각 70분과 60분이었다. 최대 탈착율은 3000psi의 압력에서 MEK가 흡착된 입상활성탄과 활성탄소섬유의 경우 각각 초기 흡착량의 64.0%, 55.3%가 탈착되었으며, 벤젠이 흡착된 입상활성탄과 활성탄소섬유의 경우에는 각각 59.1%, 45.2%가 탈착되었다. 또한 Tan과 Liou의 모델로 출구농도를 예측할 수 있었다. 따라서 입상활성탄뿐만 아니라 활성탄소섬유의 재생공정에도 초임계유체 재생법의 적응 가능성을 확인할 수 있었다.

The typical removal method of volatile organic compounds is adsorption process. In this study, granular activated carbon and activated carbon fiber were used as adsorbents, and the adsorption behavior for the two types of adsorbent was compared. And they were regenerated by supercritical carbon dioxide extraction at a constant temperature, 318.15 K, and 2000, 2500, 3000 psi respectively. The desorption percentage of initial adsorbates and iodine values were increased with pressure of supercritical carbon dioxide. The regeneration time was 70 and 60 minutes in adsorbents loaded with methyl ethyl ketone(MEK) and benzene, respectively. The desorption percentages were 64.0% for granular activated carbon and 55.3% for activated carbon fiber loaded with MEK, and 59.1% for granular activated carbon and 45.2% for activated carbon fiber loaded with benzene. The edit concentration could be evaluated by Tan and Liou model. Therefore, the granular activated carbon and the activated carbon fiber could be regenerated by supercritical fluid extraction process.

[References]

deNevers N, "Air Pollution Control Engineering," McGraw-Hill (1995)
Kander RG, Paulaitis ME, Chemical Engineering at Supercritical Fluid Condition, M.E. Paulaitis, J. Penniger, R. Gray, and P. Davison, Eds, Ann Arbor, MI, p. 461 (1983)
DeFilippi RP, Krukonis VJ, Robey RJ, Modell M, "Supercritical Fluid Regeneration of Activated Carbon for Adsorption of Pesticides," Report, EPA Washington, D.C. (1980)
Srinivasan MP, Smith JM, McCoy BM, Chem. Eng. Sci., 45, 1885 (1990)
Tan CS, Liou DC, Ind. Eng. Chem. Res., 27, 988 (1988)
Min BR, Lee CH, Hong IK, Kim WS, "A Study on the Regeneration of Activated Carbon Fiber and the Recovery of Volatile Organic Compounds II," Korea Science and Engineering Foundation (1997)
Recasens F, McCoy BJ, Smith JM, AIChE J., 35, 951 (1989)
McHugh MA, Paulaitis ME, J. Chem. Eng. Data, 25, 326 (1980)
Penninger JML, Radosz M, McHugh MA, Krukonis VJ, "Supercritical Fluid Technology," Elsevier, New York (1985)
Tan CS, Weng JY, Fluid Phase Equilib., 34, 37 (1987)
Lin SH, Hsu FM, Ind. Eng. Chem. Res., 34(6), 2110 (1995)

[1] deNevers N, "Air Pollution Control Engineering," McGraw-Hill (1995)

[2] Kander RG, Paulaitis ME, Chemical Engineering at Supercritical Fluid Condition, M.E. Paulaitis, J. Penniger, R. Gray, and P. Davison, Eds, Ann Arbor, MI, p. 461 (1983)

[3] DeFilippi RP, Krukonis VJ, Robey RJ, Modell M, "Supercritical Fluid Regeneration of Activated Carbon for Adsorption of Pesticides," Report, EPA Washington, D.C. (1980)

[4] Srinivasan MP, Smith JM, McCoy BM, Chem. Eng. Sci., 45, 1885 (1990)

[5] Tan CS, Liou DC, Ind. Eng. Chem. Res., 27, 988 (1988)

[6] Min BR, Lee CH, Hong IK, Kim WS, "A Study on the Regeneration of Activated Carbon Fiber and the Recovery of Volatile Organic Compounds II," Korea Science and Engineering Foundation (1997)

[7] Recasens F, McCoy BJ, Smith JM, AIChE J., 35, 951 (1989)

[8] McHugh MA, Paulaitis ME, J. Chem. Eng. Data, 25, 326 (1980)

[9] Penninger JML, Radosz M, McHugh MA, Krukonis VJ, "Supercritical Fluid Technology," Elsevier, New York (1985)

[10] Tan CS, Weng JY, Fluid Phase Equilib., 34, 37 (1987)

[11] Lin SH, Hsu FM, Ind. Eng. Chem. Res., 34(6), 2110 (1995)