Pyrolysis Reactivity And Volatile Organic Compounds Of Six Chinese Low-Rank Coals Analyzed By Tg And Py-Gc/Ms

To investigate the difference in the pyrolysis reactivity and molecular composition of volatile organic compounds (VOCs) between sub-bituminous and lignite during pyrolysis, the pyrolysis behaviors of six low-rank coals (LRCs) were performed with thermogravimetric analysis (TGA) and pyrolysis-gas chromatography and mass spectroscopy (Py-GC/MS). There existed an obvious difference in the pyrolysis reactivity and molecular composition of VOCsbetween sub-bituminous and lignite. The macromolecular structure of sub-bituminous coals was more thermal stability than that of lignite. The VOCs of the LRCs during pyrolysis can be classified into alkanes, alkenes, cycloalkanes, arenes, phenols, and other compounds (OCs). The total relative content of hydrocarbons in the VOCs of sub-bituminous coals was more than 80%, while the phenols were the dominated compounds in the VOCs of lignite.