Effect of Asphaltene- and Preasphaltene-Rich Solvents Upon Coal Liquefaction. Internal R and D Final Report

摘要

This report summarizes R and D work (Programs 12.1.4 and 12.1.12) performed by International Coal Refining Co. to address the design option of recycling solvent-refined coal (SRC) to the coal-slurry feed stream in the SRC-I Demonstration Plant. The major objective was to determine if solvent yield could be increased by recycling SRC, to prevent the plant from inadvertent solvent imbalance. The effect of SRC recycle on reactor yields was evaluated over a range of process conditions, using Kentucky No. 9 coals in a variety of SRC-enriched process solvents. Both light and heavy SRCs, produced from the Kerr-McGee critical solvent deashing unit at the Wilsonville Advanced Coal Liquefaction Facility, were recycled. Advantages and disadvantages of including the recycle process in the plant design are discussed in comparison with the baseline design. 12 references, 34 figures, 45 tables. (ERA citation 09:045315)