Gas holdup in slurry bubble column reactors of a 150 t/d coal liquefaction pilot plant process

摘要

Gas holdup data were obtained for three different kinds of coals in three coal liquefaction pilot plant reactors connected in series of the 150 ton-coal/day NEDOL process. The gas holdup measured was correlated with the superficial gas velocity calculated by taking into account the vapor-liquid equilibrium in the liquid or slurry phase at operating temperatures and pressures. The results showed that the gas holdup increases almost linearly with the superficial gas velocity in a range of 0.07-0.08 m/s and levels off with a further increase of the velocity.