Abstract
PAN-based activated carbon fibers were saturated by dye adsorption and then were regenerated by thermal treatment in carbon dioxide and in air. The dye adsorption and the regeneration were carried out in several cycles. The changes in fiber physical properties and the capacity of dye adsorption will be discussed. Activated carbon fibers regenerated in air had greater dye adsorption and weaker mechanical properties than those regenerated in carbon dioxide. The preferred orientation changed slightly during air reactivation, but it decreased gradually after carbon dioxide regeneration. The regeneration processes led to a decrease in the weight and degradation of mechanical properties, but the processes increased the capacity of dye adsorption. After the second regeneration, the dye adsorption capacity of activated carbon fibers that were recycled by air regeneration was 15% higher than those that were recycled by carbon dioxide regeneration. But, after the third regeneration, the fibers recycled by air regeneration lost their mechanical properties. For carbon dioxide regeneration, fibers retained satisfactory mechanical properties even after the fourth regeneration. This study indicates that multiple effective applications can be accomplished with carbon dioxide treatment in place of air regeneration. The structural changes of activated carbon fiber during different regenerations are proposed.
Similar content being viewed by others
References
G.N. Arons and R.N. Machair, Textile Res. J. 42, 60 (1974).
G. N. Arons, R. N. Machair, L. G. Coffin, and H. D. Hogan, Textile Res. J. 44, 874 (1974).
R. Y. Lin and J. Economy, Applied Polymer Symposium, No. 21, 143 (1973).
K. Kaneko, C. Ishii, M. Ruike, and H. Kuwabara, Carbon 30, 1075 (1992).
U.S. Patent 4 362 646 (1982).
U.S. Patent 4412937 (1983).
R.J. Martin and W.J. Ng, Water Res. 18, 59 (1984).
R.J. Martin and W.J. Ng, Water Res. 19, 1527 (1985).
P. Magne and P.L. Walker, Jr., Carbon 24, 101 (1986).
M. A. Ferro-Garcia, E. Utrera-Hidalgo, J. Rivera-Utrilla, and C. Moreno-Castilla, Carbon 31, 857 (1993).
T. H. Ko, P. Chiranairadul, and C.H. Lin, Polym. Eng. Sci. 31, 1618 (1991).
T. H. Ko, P. Chiranairadul, and C.K. Lu, Carbon 30, 647 (1992).
T.H. Ko, P. Chiranairadul, and C.H. Lin, J. Mater. Sci. Lett. 11, 6 (1992).
Β. D. Cullity, Element of X-ray Diffraction (Addison-Wesley, Reading, MA, 1978), Chap. 3.
F. Molleyre and M. Bastick, in Proc. 4th London int. Conf. on Carbon and Graphite (Soc. Chem. Ind., London, 1974), p. 190.
H. Marsh and K. Kuo, in Introduction to Carbon Science, edited by H. Marsh (Butterworth & Co. Ltd., Boston, 1989).
P. L. Walker, Jr. et ai, Chemistry and Physics of Carbon (Marcel Dekker, New York, 1968), Vol. 4, p. 287.
T.H. Ko, Masters Thesis, Feng Chia University, Taiwan (1985).
S. Lowell and J.E. Shields, Powder Surface Area and Porosity (Chapman and Hall, London 1991), Chap. 8.
R.E. Franklin, Proc. R. Soc. London A 209, 196 (1951).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Ko, TH., Chiranairadul, P. Regeneration of PAN-based activated carbon fibers by thermal treatments in air and carbon dioxide. Journal of Materials Research 10, 1969–1976 (1995). https://doi.org/10.1557/JMR.1995.1969
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1557/JMR.1995.1969