Narrow boiling distillates of coal liquefaction products: 3. Critical properties

✍ Scribed by Ladan E. Vajdi; David T. Allen

• Publisher: Elsevier Science
• Year: 1988
• Tongue: English
• Weight: 704 KB
• Volume: 67
• Category: Article
• ISSN: 0016-2361
• DOI: 10.1016/0016-2361(88)90065-8

✦ Synopsis

Critical properties ofnarrow boiling and wide boiling coal distillates were estimated using correlations and a group contribution method. The critical property estimates were compared with critical properties regressed from hydrogen solubility data. The correlations yielded critical temperature predictions that were in better agreement with the regressed values than the group contribution estimates; none of the methods gave accurate estimates of critical pressure. While the group contribution method did not yield the best estimates ofcritical properties, it did allow an evaluation of the sensitivity of the critical properties to structural features in the coal liquids. The results indicate that the critical properties are not sensitive to the tine details of the coal structure but depend on global features such as aromatic content and concentration of phenolic compounds.