Abstract
Coal gasification was carried out to verify the coal fouling characteristic in a drop tube furnace (DTF). Four pulverized coal samples, in the range of bituminous and sub-bituminous, were used. To analyze the fouling characteristic by different temperature of deposit probe, a two-stage deposit probe was used in the experiment. Ash deposition rate was at upper deposit probe higher than at lower one. The X-ray fluorescence (XRF) results indicated that coal fouling included acid minerals such as SiO2 and Al2O3 at upper deposit probe more than that at lower deposit probe. The results of X-ray diffraction (XRD) and scanning electron microscopy (SEM) indicated that the fouling particles at high deposit temperature were agglomerated more than those at low deposit temperature. And the convective heat transfer efficiency was reduced by ash deposition on probe. Especially, the convective heat transfer coefficient substantially declined with small particle size of fouling and Fe2O3, CaO, and MgO.
Similar content being viewed by others
References
H. M. Shim, S. J. Lee, Y. D. Yoo, Y. S. Yun and H. T. Kim, Korean J. Chem. Eng., 26(3), 641 (2009).
Y. S. Yun and Y. D. Yoo, Korean J. Chem. Eng., 18(5), 679 (2001).
H.M. Shim, S.Y. Jung, H.Y. Wang and H.T. Kim, Korean J. Chem. Eng., 26(2), 324 (2009).
M.C. Van Beek, C. C.M. Rindt, J.G. Wijers and A.A. Van Steenhoven, Heat Transfer Eng., 22, 22 (2001).
R.W. Bryers, Prog. Energy Combust. Sci., 22, 29 (1996).
R. P. Gupta, T. F. Wall and L. L. Baxter, The thermal conductivity of coal ash deposits relationships for particulate and slag structures, in: R. P. Gupta, T. F. Wall, L. L. Baxter (Eds.), pp. 65–84, The Impact of Mineral Impurities in Solid Fuel Combustion, Kluwer Academic Press, New York (1999).
J. Wu, Y. Fang, H. Peng and Y. Wang, Fuel Process. Technol., 86, 261 (2004).
X. Querol, R. Juan, A. Lopez-Soler, J. L. Fernandez-Turiel and C.R. Ruiz, Fuel, 75, 821 (1996).
S.V. Vassilev, C.G. Vassileva, A. I. Karayigit, Y. Bulut, A. Alastuey and X. Querol, Int. J. Coal Geol., 61, 65 (2005).
N. Moreno, X. Querol, J. M. Andres, K. Stanton, M. Towler, H. Nugteren, M. Janssen-Jurkovicová and R. Jones, Fuel, 84, 1351 (2005).
F. Wigley and J. Williamson, Prog. Energy Combust. Sci., 24, 337 (1998).
H.B. Vuthaluru, J. M. Vleeskens and T. F. Wall, Fuel Process. Technol., 55, 161 (1998).
G. R. Couch, Understanding slagging and fouling in of combustion, London: IEA Coal Research (1994).
A. F. Skea, T.R. Bott and S. A. Beltagui, Appl. Therm. Eng., 22, 1835 (2002).
C. J. Geankoplis, Transport processes and unit operation, 3rd Ed., pp. 275–276, Prentice Hall International, Singapore (1995).
S. Kalisz and M. Pronobis, Fuel, 84, 927 (2005).
M. Pronobis, Fuel, 85, 474 (2006).
L. H. Xu, H. Namkung, H. B. Kwon and H. T. Kim, J. Ind. Eng. Chem., 15, 98 (2009).
K. T. Stanton, M.R. Towler, P. Mooney, R.G. Hill and X. Querol, J. Chem. Technol. Biotechnol., 77, 246 (2002).
X. Wu, Z. Zhang, G. Piao, X. He, Y. Chen, N. Kobayashi, S. Mori and Y. Itaya, Energy Fuels, 23, 2420 (2009).
O. Font, X. Querol, F. Plana, P. Coca, S. Burgos and F.G. Peña, Fuel, 85, 2229 (2006).
M. J. Fernández Llorente, J. M. Murillo Laplaza, R. Escalada Cuadrado and J. E. Carrasco García, Fuel, 85, 1157 (2006).
L.Y. Huang, J. S. Norman, M. Pourkashanian and A. Williams, Fuel, 75, 271 (1996).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Namkung, H., Kang, TJ., Xu, LH. et al. Coal fouling characteristic to deposit probe with different temperatures under the gasification condition. Korean J. Chem. Eng. 29, 464–472 (2012). https://doi.org/10.1007/s11814-011-0214-2
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11814-011-0214-2