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Oxidation Experiment of Coal Spontaneous Combustion Model Compounds
Corresponding Author(s) : Yibo Tang
Asian Journal of Chemistry,
Vol. 25 No. 1 (2013): Vol 25 Issue 1
Abstract
Theories on coal spontaneous combustion were proposed by several scholars since the 17th century. The coal-oxygen complex effect theory is widely accepted by researchers at present. However, this theory still can not detailed explains the mechanism of the coal-oxygen combination. The coal is different from the other general polymer or compound. The molecular structure and composition of coal is extremely complex and irregular, which causes the disturbance in experimental test of coal spontaneous combustion. In order to solve this problem, the study applies the small-molecule model compound oxidation to simulate the coal macromolecular structure oxidation. Seven kinds of model compounds were selected to study coal spontaneous combustion according to the theories of coal spontaneous combustion and the molecule structure of coal. Oxidation products of model compounds were qualitative and quantitative tested by test devices and gas chromatographs. The results show that model compounds oxidation produce carbon monoxide, carbon dioxide, benzene and phenol, etc. Furthermore, the experiments of coal samples as the same experimental condition as the model compounds were implemented for comparison of the oxidation products. The concentration of benzene and phenol in model compounds oxidation products is calculated by external reference method. It is demonstrated that the oxidation processes and properties of the model compounds are consistent with the coal, which provides references for explaining the mechanism of coal spontaneous combustion in chemical view.
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References
R. Jones and D.T.A. Townend, Nature, 155, 424 (1945).
R. Jones and D.T.A. Townend, J. Soc. Chem. Ind., 68, 197 (1949).
M.A. Smith and D. Glasser, Fuel, 84, 1151 (2005).
D.M. Wang, Mine Fire, China University of Mining and Technology Press, Xuzhou, China (2008).
H.Y. Niu and X.H. Zhang, Research on the Coal Self-ignition and Prevention Techniques Classification, Industrial Safety and Dust Control, p. 33 (2007).
Z.H. Li, J. China Univ. Min. Technol., 25, (1996).
B.M. Benjamin, E.C. Douglas and D.M. Canonico, Fuel, 63, 888 (1984).
Y.G. Liu, L. Yang and R.Q. Zhang, Ind. Catal., 15, (2007).
Z.H. Li, Y.L. Wang, N. Song, Y.L. Yang and Y.J. Yang, Procedia Earth Planetary Sci., 1, 123 (2009).
Y.Y. Zhong, M.B. Guan and K.R. Cui, Coal Chemistry, Xuzhou, China University of Mining and Technology Press (1989).
P.Z. Zhu and J.S. Gao, Coal Chemistry, Shanghai Science and Technology Press, Shanghai, China (1984).
J.R. Wang and C.B. Deng, J. China Coal Soc., 24, (2001).
H. Wang, B.Z. Dlugogorski and E.M. Kennedy, Fuel, 78, 1073 (1999).
H.H. Wang, B.Z. Dlugogorski and E.M. Kennedy, Fuel, 81, 1913 (2002).
J.C. Xu, X.H. Zhang, H. Wen and J. Deng, J. China Univ. Min. Technol., 29, (2000).
H. Wen and A.P. Dai, Coal Conv., 27, (2004).
T. Shi, J. Deng and X.F. Wang, J. Fuel Chem. Technol., 32, (2004).
Organic Chemistry Department of Tianjin University. Organic Chemistry, Higher Education Press, Beijing, China (1998).
Q.Z. Wang and Z.J. Yang, Organic Chemistry, Tsinghua University Press, Beijing, China (1997).