Analysis of upgraded SRC-11 and H-coal liquid products

✍ Scribed by Lih-Jiuan S. Young; Norman C. Li; Dennis Hardy

• Publisher: Elsevier Science
• Year: 1983
• Tongue: English
• Weight: 557 KB
• Volume: 62
• Category: Article
• ISSN: 0016-2361
• DOI: 10.1016/0016-2361(83)90313-7

✦ Synopsis

Upgraded coal-derived liquids obtained from catalytic hydroprocessing of SRC-II and H-coal syncrudes have been studied by i.r., p.m.r., g.c.-m.s., and silica gel chromatography. With increase in residence time, nitrogen, oxygen and aromatics decrease, while naphthenes increase substantially. All the upgraded liquids show low viscosity at 298 K (1.3-l .4 mN s m-'), even though saturate and aromatic fractionsvaried with processing severity. In the aromatic-l fraction, 1 -ring aromatics increase, and 3-ring aromatics decrease, with increase in severity of hydroprocessing. G.c.-m.s. analyses indicate a marked qualitative similarity for saturate and aromatic fractions irrespective of syncrude source. Only the heavier end of the aromatic-l fraction is noticeably different. Tentative identifications based on ms. and g.c. retention times are made for most of the significant components. 600 MHz p.m.r. spectra of the upgraded SRC-11 and H-coal liquids appear identical, but the n.m.r. difference technique revealed slight differences between the two liquids in concentrations of certain species.