Kinetic rate model interpretation of the SRC-II liquefaction of an Ireland Mine coal

✍ Scribed by William E. King Jr.

• Publisher: Elsevier Science
• Year: 1984
• Tongue: English
• Weight: 475 KB
• Volume: 63
• Category: Article
• ISSN: 0016-2361
• DOI: 10.1016/0016-2361(84)90152-2

✦ Synopsis

An experimental data base for characterizing the SRC-II liquefaction of an Ireland Mine coal is interpreted using an empirical rate model developed from SRC-II liquefaction data for a Powhatan No. 5 coal exclusively. The model predictions for hydrogen consumption and for the yields of the key components; C,-C, gases, (Is-755 K liquids, and solvent-refined coal (SRC) are compared with the experimental values over a wide range of reactor operating conditions; temperature (703-743 K), pressure (10.2-20.4 MPa), and recycle ash (2.0-I 0.4 wt%). Model predictions are in good agreement with hydrogen consumption measurements at baseline conditions (728 K and 13.6 MPa) and at more severe conditions (743 K and 20.4 MPa) for a feed slurry containing 30 wt% coal and 10.4 wt% recycle ash (absolute error f6.4%).

A similar result is obtained for the C,-C, gases and the (Is-755 K liquids at the baseline conditions; however, the error in the SRC yield prediction is higher (+I 2.1%). The model predictions for the key components at the higher severity conditions deviate more than those for the baseline conditions.