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

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

Applied Energy, 2016, vol. 183, issue C, 470-477

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.%)Keywords: Pyrolysis; Coal; Carbon structure; Coal tar; Liquid alkane (search for similar items in EconPapers)
Date: 2016
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Citations: View citations in EconPapers (9)

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DOI: 10.1016/j.apenergy.2016.08.166

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