title: A Combined Raman Spectroscopic and Thermogravimetric Analysis Study on Oxidation of Coal with Different Ranks.
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 I GR/I All and I (G + GR)/I All but lower values of I D/I (G+GR), I DL/I (G+GR), I (S + SL)/I (G+GR), and I (GL+GL')/I (G+GR). The oxidation properties of the coal samples were characterized by the reactivity indexes T ig, T 20%, and T max from TGA data which were found to correlate well with the band area ratios of I GR/I All, I (G + GR)/I All, and I (S + SL)/I (G+GR). 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.
authors.affiliation: State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 221116, China.
authors.forename: Weiqing
authors.initials: W
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 221116, China ; School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China.
authors.forename: Shuguang
authors.initials: S
authors.lastname: Jiang
authors.affiliation: School of Chemistry and Chemical Engineering/QUILL, Queen's University Belfast, Belfast BT9 5AG, UK.
authors.forename: Christopher
authors.initials: C
authors.lastname: Hardacre
authors.affiliation: School of Chemistry and Chemical Engineering/QUILL, Queen's University Belfast, Belfast BT9 5AG, UK.
authors.forename: Peter
authors.initials: P
authors.lastname: Goodrich
authors.affiliation: School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China.
authors.forename: Kai
authors.initials: K
authors.lastname: Wang
authors.affiliation: School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China.
authors.forename: Hao
authors.initials: H
authors.lastname: Shao
authors.affiliation: School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China.
authors.forename: Zhengyan
authors.initials: Z
authors.lastname: Wu