Kinetic Study of the Changes in Element Occurrence During Low-Temperature Oxidation of Coal

Junfeng Wang; Yue Wu; Yulong Zhang; Sheng Xue; Liping Chang; Zhengfeng Li

doi:10.14233/ajchem.2014.16574

Issue

Vol. 26 No. 4 (2014): Vol 26 Issue 4

Issue Published : February 15, 2014

This work is licensed under a Creative Commons Attribution 4.0 International License.

Kinetic Study of the Changes in Element Occurrence During Low-Temperature Oxidation of Coal

https://doi.org/10.14233/ajchem.2014.16574

Junfeng Wang

College of Mining and Technology, Taiyuan University of Technology, Taiyuan 030024, P.R. China

Yue Wu

Faculty of Engineering, University of Wollongong, Wollongong, NSW, 2522 Australia

Yulong Zhang

College of Mining and Technology, Taiyuan University of Technology, Taiyuan 030024, P.R. China ;Key Laboratory of Coal Science and Technology, Taiyuan University of Technology, Ministry of Education and Shanxi Province, Taiyuan 030024, P.R. China

Sheng Xue

College of Mining and Technology, Taiyuan University of Technology, Taiyuan 030024, P.R. China ;CSIRO Earth Science and Resource Engineering, PO Box 883, Kenmore, QLD, 4069 Australia

Liping Chang

Key Laboratory of Coal Science and Technology, Taiyuan University of Technology, Ministry of Education and Shanxi Province, Taiyuan 030024, P.R. China

Zhengfeng Li

Key Laboratory of Coal Science and Technology, Taiyuan University of Technology, Ministry of Education and Shanxi Province, Taiyuan 030024, P.R. China

Corresponding Author(s) : Sheng Xue

tyutky@126.com

Asian Journal of Chemistry, Vol. 26 No. 4 (2014): Vol 26 Issue 4
Article Published : February 15, 2014

Abstract

Complex macromolecular matrix of coal is divided into the elements of C, O, H, S and N, which are all involved into the concerned reaction. Based on the changes in element occurrence during coal oxidation at low temperature, the pseudo-first-order reaction kinetics was used to evaluate the kinetic characteristics of coal oxidation. Coats and Refern's as well as Horowiz and Metzger's models were also used to model the changes in element occurrence. The activation energies obtained by the pseudo-first order kinetic have been found to be almost similar to those calculated by applying the Coats and Redfern's equation and the energies are higher when Horowitz and Metzger's equation is applied. The release of element H shows the highest rate constants (K) and lowest activation energy value (E_a) when compared with these values for C and N. A kinetic compensation effect between K and E_a was observed for the changes in element occurrence.

Keywords

Coal Low-temperature oxidation Element occurrence Kinetics

Wang, J., Wu, Y., Zhang, Y., Xue, S., Chang, L., & Li, Z. (2014). Kinetic Study of the Changes in Element Occurrence During Low-Temperature Oxidation of Coal. Asian Journal of Chemistry, 26(4), 1249–1252. https://doi.org/10.14233/ajchem.2014.16574

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Y.B. Tang, Z.H. Li, Y.L. Yang and D.J. Ma, Asian J. Chem., 25, 3384 (2013).

X.G. Qi, D.M. Wang, H.H. Xin and G.S. Qi, Asian J. Chem., 25, 6957 (2013).

J. Xie, S. Xue, W.M. Cheng and G. Wang, Int. J. Coal Geol., 85, 123 (2011); doi:10.1016/j.coal.2010.10.007.

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Y.B. Tang, Z.H. Li, D.J. Ma and H.H. Ji, Asian J. Chem., 25, 8660 (2013); doi:10.14233/ajchem.2013.14926.

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A.P. Dhupe, A.N. Gokarn and L.K. Doraiswamy, Fuel, 70, 839 (1991); doi:10.1016/0016-2361(91)90192-D.

K. Yip, E. Ng, C.Z. Li, J.I. Hayashi and H. Wu, Proc. Combust. Inst., 33, 1755 (2011); doi:10.1016/j.proci.2010.07.073.

Issue

Vol. 26 No. 4 (2014): Vol 26 Issue 4

Kinetic Study of the Changes in Element Occurrence During Low-Temperature Oxidation of Coal

Corresponding Author(s) : Sheng Xue

Abstract

Keywords

Full Article

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