Comparison of primary and two-stage coal liquefaction products

✍ Scribed by Aleksandra Rusin; Tadeusz Pazdziorek

• Publisher: Elsevier Science
• Year: 1989
• Tongue: English
• Weight: 952 KB
• Volume: 68
• Category: Article
• ISSN: 0016-2361
• DOI: 10.1016/0016-2361(89)90245-7

✦ Synopsis

Coal-derived liquids obtained from direct, non-catalytic hydrogenation of Polish subbituminous coal were fractionated into four main distillation fractions: light, middle, vacuum and carbonization oils. The light and middle fractions were upgraded in a two-stage hydrogenation process under various conditions using Ni-Mo hydrotreating catalysts. Recycle solvent and hydroproducts were characterized by routine i.r., IH/'jC n.m.r. and g.c.-m.s. techniques. The results revealed complex changes occurring in physicochemical properties, structural parameters and chemical composition of hydroproducts with distillation range and hydroreiining conditions. The n.m.r. and g.c.-m.s. data on donatable hydrogen showed a good correlation.