Articles & Issues

Language: English

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received August 21, 2006
Accepted November 14, 2006

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

All issues

Comparison of fractal properties of porous structures during coal devolatilization

Xiaoliang Wang Rong He^†

Department of Thermal Engineering, Tsinghua University, Beijing 100084, China

rhe@mail.tsinghua.edu.cn

Korean Journal of Chemical Engineering, May 2007, 24(3), 466-470(5)
https://doi.org/10.1007/s11814-007-0081-z

Download PDF

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.

Keywords

Fractal Coal/Char Pores Devolatilization

References

Clarkson CR, Bustin RM, Fuel, 78(11), 1333 (1999)
Feng B, Suresh KB, Carbon, 41, 507 (2003)
Koichi M, Hiroyuki A, Xu WC, Rajender G, Terry FW, Akira T, Fuel, 84, 63 (2005)
Ruiz B, Parra JB, Pajarea JA, Pis LJ, J. Anal. Appl. Pyrolysis, 58, 873 (2001)
Singla PK, Miura S, Hudgins RR, Silveston PL, Fuel, 62, 645 (1983)
Zajdlik R, Jelemensky L, Remiarova B, Markos J, Chem. Eng. Sci., 56(4), 1355 (2001)
Avnir D, Farin D, Pfeifer P, J. Colloid Interface Sci., 103, 112 (1985)
Friesen WI, Mikula RJ, J. Colloid Interface Sci., 120, 263 (1987)
Friesen WI, Ogunsola OI, Fuel, 74, 604 (1995)
McMahon PJ, Snook IK, Treimer W, J. Colloid Interface Sci., 252(1), 177 (2002)
Mitropoulos AC, Haynes JM, Richardson RM, Steriotis TA, Stubos AK, Kanellopoulos NK, Carbon, 34, 775 (1996)
Nakagawa T, Nishikawa K, Komaki I, Carbon, 37, 520 (1999)
Nakagawa T, Komaki I, Sakawa M, Nishikawa K, Fuel, 79, 1341 (2000)
Salatino P, Zimbardi F, Carbon, 32, 51 (1994)
Hu S, Li M, Xiang J, Sun LS, Li PS, Su S, Sun XX, Fuel, 83, 1307 (2004)
He R, Xu XC, Chen CH, Fan H, Zhang B, Fuel, 78, 1291 (1998)
Ehrburger P, Louys F, Lahaye J, Carbon, 27, 389 (1989)
Walker PLJ, Carbon, 28, 261 (1990)
He R, Sato J, Chen CH, Combust. Sci. Technol., 174(4), 19 (2002)
Park SS, Kang HY, Korean J. Chem. Eng., 23(3), 367 (2006)
Lee KH, Kim SY, Yoo KP, Korean J. Chem. Eng., 11(2), 131 (1994)