Volume 43 Issue 4
Oct.  2021
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MA Zhihao, YANG Hong, ZHANG Yugui, LEI Dongji, ZHANG Lei. Characterization and analysis of Zouzhuang tectonic coal with different degree of demineralization[J]. COAL GEOLOGY & EXPLORATION, 2015, 43(4): 11-16. DOI: 10.3969/j.issn.1001-1986.2015.04.003
Citation: MA Zhihao, YANG Hong, ZHANG Yugui, LEI Dongji, ZHANG Lei. Characterization and analysis of Zouzhuang tectonic coal with different degree of demineralization[J]. COAL GEOLOGY & EXPLORATION, 2015, 43(4): 11-16. DOI: 10.3969/j.issn.1001-1986.2015.04.003
shu

Characterization and analysis of Zouzhuang tectonic coal with different degree of demineralization

  • 1. Department of Physics and Chemistry, Henan Polytechnic University, Jiaozuo 454000, China;

  • 2. Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region, Henan Province, Jiaozuo 454000, China;

  • 3. State Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic University, Jiaozuo 454000, China

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  • Received Date: May 12, 2014
  • Available Online: October 21, 2021
    Graphical Abstract
    • Abstract
  • To investigate the effects of acid washing on coal quality properties, and tectonic coal from Zouzhuang was pretreated by hydrochloric acid solutions of different concentrations. Coal samples were extracted with chloroform solvent using fractionated samples in ultrasound-microwave extractor. Structure characteristics of the extracts were studied in detail by means of FTIR analysis and the extracts were separated by column chromatography and fluorescence characteristics of the group components were also analyzed. The results show that the removal ratio and extraction rate of coal increased with the degree of acid treatment; FTIR absorption spectra showed increasingly evident intermittent trend. The content of saturated hydrocarbon and aromatic hydrocarbon in column chromatography groups increased gradually, whereas asphaltenes content decreased stepwise. The structural dynamic action makes the coal molecular structure have polycondensation and aromatization, speeding up the evolution of the macromolecular hydrocarbons (asphaltenes). The coal extracts of maximum fluorescence intensity changes into "U" shape. The fluorescence intensity of aromatics is obviously higher than that of extraction, the hydrocarbon and asphaltenes, which may be caused by the size of molecular weight.
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