DOI QR코드

DOI QR Code

Adsorption Characteristics of Toluene Vapor in Fixed-bed Activated Carbon Column

고정층 활성탄 흡착반응기에서 기상 톨루엔의 흡착특성

  • Published : 2005.01.01

Abstract

Adsorption characteristics of toluene vapor, which is one of important source of volatile organic compounds (VOCs), by activated carbon were investigated using a fixed bed adsorption column. The operating parameters such as breakthrough curve, adsorption capacity, mass transfer zone (MTZ), and length of unused bed (LUB) were studied. The experimental results showed that the breakthrough time decreased with increasing inlet toluene concentration and gas flow rate. MTZ and LUB increased with the increase of inlet concentration, gas flow rate, and particle size of activated carbon. The adsorption capacity increased with the increase of inlet toluene concentration, while it decreased with increasing particle size. However, it was kept at constant value regardless of the increase of gas flow rate. Adsorption isotherm of toluene vapor could be represented by the Freundlich adsorption equation fairly well. From the adsorption experiments using some VOC gases such as toluene, xylene, butyl acetate. butanol and acetone, it was also found that the adsorption capacity was higher in the case of gas with higher boiling point and lower vapor pressure.

Keywords

Activated carbon;Adsorption;Toluene;Adsorption capacity;Mass transfer zone;Length of unused bed

References

  1. Kim, H. S. and Y. S. Park, 2003, Binary component adsorption characteristics of benzene and toluene at the fixed-bed adsorption column with activated carbon, J. of KSEE 25, 977-983
  2. Ruhl, M. J, 1993, Recover VOCs via adsorption on activated carbon, Chem Eng. Prog., 37, 1344-1350
  3. Noll, K. E., V. Goumaris and W. S. Hou, 1992, Adsorption Technology for Air and Water Pollution Control, Lewis, Chelsea, MI, 1804-1810pp
  4. Rodrguez-Reinoso, F., 1997, Introduction to Carbon Technologies, H. Marsh, E. A. Heintz, and F. Rodrguez-Reinoso, eds., Chap. 2, Univ. of Alicante, Alicante, Spain, 35pp
  5. Lee, H. U, J. S. Kirn., H. K. Song and B. K. Na, 1999, Adsorption and desorption characteristics of MEK with activated carbon and polymer adsorbent, HWAHAK KONGHAK, 37(1), 120-125
  6. Kim, H. S., Y. S. Park and B. M. Min, 2001, Adsorption characteristics of benzene at the fixed-bed adsorption column, J. of KSEE, 23, 1979-1988
  7. Seong, C. W, H. Y. Park, C. H. Lee and W. S. Kim, 1996, Adsorption of volatile organic compounds onto activated carbon fibers, Chem. Eng. Appl. and Theor., 4, 1653-1656
  8. Kim, B., J. H. Kim, H. Y. Park, C. H. Lee and W. S. Kim, 1998, Adsorption and desorption of volatile organic compounds onto activated carbon fibers, Chem. Eng. Appl. and Theor., 4, 2573-2576
  9. Nelson, G. O. and C. A. Harde, 1974, Respirator cartridge efficiency studies: V. Effect of solvent vapor, Am. Ind. Hyg, Assoc. J., 37, 391-410
  10. Nelson, G. O. and C. A. Harder, 1976, Respirator cartridge efficiency studies: VI. Effect of concentration, Am. Ind. Hyg. Assoc. J., 37, 205-216 https://doi.org/10.1080/0002889768507444
  11. Wood, G. O., 1994, Estimating service lives of organic vapor cartridges, Am. Ind. Hyg. Assoc. J, 55, 11-15 https://doi.org/10.1080/15428119491019203
  12. Cohen, H. J and R. P. Garrison, 1989, Development of a field method for evaluating the service life of organic vapor cartridges : Results of laboratory testing using carbon tetrachloride, Am. Ind. Hyg. Assoc. J, 50, 486-496 https://doi.org/10.1080/15298668991375038
  13. Wood, G. O. and E. S. Moyer, 1991, A review and comparison of adsorption isotherm equations used to correlate and predict organic vapor cartridge capacities, Am. Ind. Hyg, Assoc. J, 52, 235-242 https://doi.org/10.1080/15298669191364659
  14. Vahdat, N., P. M. Swearengen, J. S. Johnson, S. Priante, K. Mathews and A. Neihart, 1995, Adsorption capacity and thermal desorption efficiency of selected adsorbents, Am. Ind. Hyg. Assoc. J., 56(1), 32-38 https://doi.org/10.1080/15428119591017286
  15. Wood, G. O and E. S. Moyer, 1989, A review of the Wheeler equation and comparison of its applications to organic vapor respirator cartridge breakthrough data, Am. Ind. Hyg, Assoc. J, 50, 400-407 https://doi.org/10.1080/15298668991374886
  16. Chuang, C. L., P. C. Chiang and E. E. Chang, 2003, Modeling VOCs adsorption onto activated carbon, Chemosphere, 53, 17-27 https://doi.org/10.1016/S0045-6535(03)00357-6
  17. Lucas, S., M. P. Calvo, C. Palencia and M. J, Cocero, 2004, Mathmatical model of supercritical CO2 adsorption on activated carbon effect of operating conditions and adsorption scaleup, J, of Supercritical Fluids, 32, 193-201 https://doi.org/10.1016/j.supflu.2004.02.008
  18. Yoon, J, H. and G. O. Nelson, 1984, Application of gas adsorption kinetics: I. A theoretical model for respirator cartridge service life, Am. Ind. Hyg. Assoc. J., 45 (8), 509-516 https://doi.org/10.1080/15298668491400197
  19. McCabe, W, L., J, C. Smith and P. Harriot, 2001, Unit Operations of Chemical Engineering, 6th ed., McGraw Hill, 1114pp
  20. Reynolds, T. D. and P. A. Richards, 1998, Unit Operations and Process in Environmental Engineering, 2nd ed., PWD Publishing, 798pp
  21. Hwang, K. S., K. D. Choi and Y. S. Kong, 1998, The thermal regeneration characteristics of volatile organic compounds on an activated carbon bed ( I ) : Adsorption step, J, of KIChE, 36(2), 159-168
  22. Lee, J, J, and H. Y. Yu, 1998, Adsorption characteristics of BEAM by granular activated carbon(II), J, of KSSE, 20(4), 509-518
  23. Cho, K. C., B. H. Shon, Y. M. Jo and K. J, Oh, 1999, A study on the $H_{2}S$ removal using $Na_{2}CO_{3}$ impregnated activated carbon, J. of KSEE, 21(11), 2017-2025
  24. Jeon, Y. H., J, H. Young, B. H. Shon and S. W. Cho, 1996, A study on adsorption characteristics of $SO_{2}$ gas in a fixed-bed ad sorber, J. of KSEE, 18, 961-969
  25. Oh, K. J., J. J. Kim, Y. H. Jean and B. H. Son, 1996, Adsorption characteristics of $SO_{2}$ using soil bed, J. of KSEE, 18(2), 171-179
  26. Chiang, P. C., J. H. Yun, 1993, Evaluation of adsorbents for volatile organic chemicals, Stud. Surf. Sci. Cat., 80, 89-96 https://doi.org/10.1016/S0167-2991(08)63502-8
  27. Park, J. T. and J. S. Kim, 1994, Adsorption breakthrough characteristics of organic solvent vapors in an activated carbon fixed bed, J. of KSWES, 11(4), 569-577
  28. Yoo, K. S., J. W. Shin, S. W Shin and J. H. Jeong, 2003, Characteristics of methanol adsorption over thermally treated activated carbon, HWAHAK KONGHAK, 41(4), 491-496
  29. Ahrnadpour, A. and D. D. Do, 1995, Characterization of modified activated carbons, equilibria and dynamics studies, Carbon, 33(10), 1393-1398 https://doi.org/10.1016/0008-6223(95)00085-R
  30. Cui, X., R. Marc Bustin and D. Gregory, 2004, Selective transport of $CO_{2}$, $CH_{4}$, $N_{2}$ in coals: insight from modeling of experiment gas adsorption data, Fuel, 83, 293-303 https://doi.org/10.1016/j.fuel.2003.09.001

Cited by

  1. Breakthrough data analysis of adsorption of volatile organic compounds on granular activated carbon vol.27, pp.2, 2010, https://doi.org/10.1007/s11814-010-0079-9
  2. Variations of Adsorption Characteristics of Binary Vapor According to Packing System of Double-layer Adsorption Bed vol.21, pp.3, 2012, https://doi.org/10.5322/JES.2012.21.3.305