Sequential thermal dissolution of two low‐rank coals and characterization of their structures by high‐performance liquid chromatography/time‐of‐flight mass spectrometry and gas chromatography/mass spectrometry
Abstract:Rationale
Gas chromatography/mass spectrometry (GC/MS) and high‐performance liquid chromatography/time‐of‐flight mass spectrometry (HPLC/TOF‐MS) were used to separate and reveal the molecular characteristics of organic matter in low‐rank coals.
Methods
Six soluble portions (SPs) were obtained by sequential thermal dissolution (TD) of two low‐rank coals in the order of cyclohexane, acetone and methanol solvents at 300°C. Organic matter with different molecular characteristics were enriched in eachTD extract, wh… Show more
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