Kinetics of donor-vehicle coal liquefaction in a flow reactor

✍ Scribed by Roy J. Brunson

• Publisher: Elsevier Science
• Year: 1979
• Tongue: English
• Weight: 534 KB
• Volume: 58
• Category: Article
• ISSN: 0016-2361
• DOI: 10.1016/0016-2361(79)90118-2

✦ Synopsis

Development of the Exxon Donor Solvent process has necessitated studies to more clearly define the influence of liquefaction conditions on coal conversion. Process studies were conducted in a 22.7 kg/day (fifty-pound-per-day) integrated pilot plant. Illinois No. 6 coal was liquefied at temperatures from 644 to 756 K, pressures of 10 and 17 MPa, and a tenfold range of residence time. A kinetic model was developed in terms of an empirical classification of four reactive coal constituents. The reactive classes are an incorporation of concepts published in other coal-liquefaction kinetic studies. The effect of vehicle vaporization on actual residence time was used in evaluating the kinetic parameters for this study in a tubular flow reactor. The kinetic model accurately predicts distillation bottoms yields, which ranged from 41 to 72 wt % on coal. Material-balanced quadratic equations are presented for other liquefaction products.