作者: Colin E. Snape , William R. Ladner , Keith D. Bartle
DOI: 10.1016/0016-2361(85)90341-2
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摘要: Abstract Information on the nature of aliphatic groups in some bituminous coals and lignites was obtained by determining their fate during extraction pyrolysis processes differing severity. Aromatics (neutral oils) asphaltenes from supercritical gas hydrogen-donor solvent extracts hydropyrolysis tars have been characterized an n.m.r.-based structural analysis method which identifies hydroaromatic, methyl long alkyl (⩾C8) groups. The results indicate that other alkyls account for about half carbon, chains being major group lignites. There is evidence to suggest are joined aromatic structures. Hydroaromatic small consisting only 1–2 rings less carbon than previously thought. Their concentrations those aromatics generally decrease with increasing process