Abstract
This paper investigates fractal property changes of pore structures during coal devolatilization. Similar to char pores, coal pores can also be classified as micro pores and macro pores based on their fractal dimensions. The specific surface area and fractal dimension of micro pores in coal particles are basically unchanged after devolatilization. However, the specific surface area and fractal dimension of macro pores, which are key factors in char combustion, are increased after devolatilization. In fact, the fractal dimensions are basically doubled. These parameters will affect another fractal geometrical factor β in char pores that is correlated to char combustion rate. Since the rate of char combustion can be predicted from their fractal pore properties, it may be possible to predict char combustion directly from the properties of their parent coal pores in the future.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
C. R. Clarkson and R. M. Bustin, Fuel, 78, 1333 (1999).
B. Feng and K. B. Suresh, Carbon, 41, 507 (2003).
M. Koichi, A. Hiroyuki, W. C. Xu, G. Rajender, F. W. Terry and T. Akira, Fuel, 84, 63 (2005).
B. Ruiz, J. B. Parra, J. A. Pajarea and L. J. Pis, J. Anal. Appl. Pyrolysis, 58, 873 (2001).
P. K. Singla, S. Miura, R. R. Hudgins and P. L. Silveston, Fuel, 62, 645 (1983).
R. Zajdlik, L. Jelemensky, B. Remiarova and J. Markos, Chem. Eng. Sci., 56, 1355 (2001).
D. Avnir, D. Farin and P. Pfeifer, J. Colloid Interface Sci., 103, 112 (1985).
W. I. Friesen and R. J. Mikula, J. Colloid Interface Sci., 120, 263 (1987).
W. I. Friesen and O. I. Ogunsola, Fuel, 74, 604 (1995).
P. J. McMahon, I. K. Snook and W. Treimer, J. Colloid Interface Sci., 252, 177 (2002).
A. C. Mitropoulos, J. M. Haynes, R. M. Richardson, T. A. Steriotis, A. K. Stubos and N. K. Kanellopoulos, Carbon, 34, 775 (1996).
T. Nakagawa, K. Nishikawa and I. Komaki, Carbon, 37, 520 (1999).
T. Nakagawa, I. Komaki, M. Sakawa and K. Nishikawa, Fuel, 79, 1341 (2000).
P. Salatino and F. Zimbardi, Carbon, 32, 51 (1994).
S. Hu, M. Li, J. Xiang, L. S. Sun, P. S. Li, S. Su and X. X. Sun, Fuel, 83, 1307 (2004).
R. He, X. C. Xu, C. H. Chen, H. Fan and B. Zhang, Fuel, 78, 1291 (1998).
P. Ehrburger, F. Louys and J. Lahaye, Carbon, 27, 389 (1989).
P. L. J. Walker, Carbon, 28, 261 (1990).
R. He, J. Sato and C. H. Chen, Combust. Sci. Technol., 174, 19 (2002).
S. S. Park and H. Y. Kang, Korean J. Chem. Eng., 23, 367 (2006).
K. H. Lee, S. Y. Kim and K. P. Yoo, Korean J. Chem. Eng., 11, 131 (1994).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Wang, X., He, R. Comparison of fractal properties of porous structures during coal devolatilization. Korean J. Chem. Eng. 24, 466–470 (2007). https://doi.org/10.1007/s11814-007-0081-z
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11814-007-0081-z