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Relevance of carbon structure to formation of tar and liquid alkane during coal pyrolysis

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  • Liu, Peng
  • Le, Jiawei
  • Wang, Lanlan
  • Pan, Tieying
  • Lu, Xilan
  • Zhang, Dexiang

Abstract

The relevance of carbon structure to formation of tar and liquid alkane during coal pyrolysis were discussed extensively. The pyrolysis tests were carried out in a tube reactor at 873K and keep 15min. The carbon distribution in coals was investigated by solid state 13C nuclear magnetic resonance (N.M.R.). The curve-fitting method was used to quantify the accurate contents of structural carbon. The alkanes in coal tar were analyzed by Gas Chromatograph–Mass Spectrometer (GC–MS). The results show that oxygen-linked aromatic carbon decreases with the increasing of coal rank. The aliphatic carbon contents of Huainan (HN) coal are 44.20%, the highest among the four coals. The carbon types in coal structure have a significant influence on the formation of tar and liquid alkane. The coal tar yields are related to the aliphatic substituted aromatic carbon, CH2/CH3 ratio and oxygen-linked carbon in coal so that the increasing order of tar yield is Inner Mongolia lignite (IM, 6.30wt.%)

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  • Liu, Peng & Le, Jiawei & Wang, Lanlan & Pan, Tieying & Lu, Xilan & Zhang, Dexiang, 2016. "Relevance of carbon structure to formation of tar and liquid alkane during coal pyrolysis," Applied Energy, Elsevier, vol. 183(C), pages 470-477.
    • Handle: RePEc:eee:appene:v:183:y:2016:i:c:p:470-477
    DOI: 10.1016/j.apenergy.2016.08.166
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