Composition distribution and structure characteristics of CS2 soluble species from coal gasification heavy aromatics
With heavy aromatic hydrocarbons(HA)from Xinjiang Qinghua Coal Gasifier as the research object,the soluble portion(SP)was separated under ultrasonic condition with CS2 as the solvent.Compo-sition and structure characteristics of the soluble portion(SP)were analyzed by several characterization methods.FTIR results showed that the hydroxyl absorption peak in SP became broader compared with that of HA,indicating that the soluble portion might contain more alcohols or phenols.It is found from GC/MS analysis that the soluble portion was dominated by aromatic hydrocarbons,alkane chain hydrocarbons,and oxygenated compounds,with the relative contents of 56.2%,12.1%,and 16.8%,respectively.Strongly polar compounds containing heteroatoms,mainly phenols,naphthols,benzene carboxylic acids,furanones,and enolates,were detected by four-stage rod-electrostatic field orbitrap high-resolution mass spectrometer(Orbitrap MS).Based on the composition distribution and structure characteristics of CS2 soluble portion,the subsequent separation and transformation of heavy hydrocarbon aromatics can be observed in the future.
heavy aromatic hydrocarbonsextractionsoluble portioncomposition distributionstructure characteristics
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