| 초록 |
A gas-liquid Eulerian computational fluid dynamics model coupled with a population balance equation was presented to investigate hydrodynamics of a bubble column with hydrocracking reactions in slurry reactor at 160 bar, 430°C (1.95 m in height, 0.05 m in inner diameter and 0.04 m in uniform gas distributor diameter) in terms of pressure drop, gas holdup, mean bubble size, and specific bubble surface area. The column was initially filled with the vacuum residue (VR) and vacuum gas oil (VGO) mixture at a height of 1.95 m. The VR/VGO mixture with 80% VR and 20% VGO by weight, was injected at a velocity of 0.48 mm/s. The H2 was injected through the gas distributor at a superficial gas velocity of 6.4 mm/s. For the slurry reactor at the high pressure and temperature, the pressure drop, the total gas holdup, the mean bubble size and the bubble surface area were estimated to be 6,610 Pa/m, 0.024, 2.6 mm and 56.4 m2/m3, respectively. A comparison between before and after reactions in terms of gas holdup, gas velocity, bubble diameter and number of bubbles were also presented in this study. |
