Operation of a Coal Liquefaction PDU with Full Gas and Liquid Recycle Capability: Effect of Superficial Gas Velocity in Reactor

摘要

SRC-II liquefaction yield structures were obtained in an 1000 lb (coal) per day liquefaction PDU when operated at typical SRC-II reactor conditions. The PDU is distinguished from Gulf units by a tall reactor design (24m) that allowed operation at commercial superficial gas velocities. Liquefaction of Blackville No. 2 coal demonstrated a significantly improved selectivity toward distillate relative by hydrocarbon gas make, however, when the gas velocity was raised to 0.18 m/sec, the highest value tested, and the nominal residence time was increased to 1.5 hr. The efficiency of hydrogen utilization improved from 7.6 kg distillate yield/kg H sub 2 consumed at conventional SRC-II conditions to 11.4 kg distillate/kg H sub 2 under the most favorable PDU conditions. 37 references, 24 figures, 15 tables. (ERA citation 10:008151)