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Journal of Analytical Methods in Chemistry
Volume 2015 (2015), Article ID 306874, 8 pages
http://dx.doi.org/10.1155/2015/306874
Research Article

A Combined Raman Spectroscopic and Thermogravimetric Analysis Study on Oxidation of Coal with Different Ranks

1State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 221116, China
2School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China
3School of Chemistry and Chemical Engineering/QUILL, Queen’s University Belfast, Belfast BT9 5AG, UK

Received 12 September 2015; Accepted 4 November 2015

Academic Editor: Christos Kontoyannis

Copyright © 2015 Weiqing Zhang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Raman spectroscopy and nonisothermal thermogravimetric analysis (TGA) measurements have been reported for different rank coals (lignite, bituminous coal, and anthracite) and the relationship between the measurements was examined. It was found that the Raman spectra parameters can be used to characterize structure changes in the different rank coals, such as the band area ratios based on the curve-fitted results. Higher ranked coal was found to have higher values of and but lower values of , , , and . The oxidation properties of the coal samples were characterized by the reactivity indexes , , and from TGA data which were found to correlate well with the band area ratios of , , and . Based on these correlations, the Raman band area ratios were found to correlate with the oxidation activity of coal providing additional structural information which can be used to understand the changes in the TGA measurements.