Journal
CHEMICAL ENGINEERING & TECHNOLOGY
Volume 44, Issue 3, Pages 417-430Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ceat.202000231
Keywords
Bubble-column reactor; Bubble size; Churn-turbulent regime; Single-bubble model; Varying-bubble model
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The study utilized a varying-bubble model to simulate a slurry bubble-column reactor, demonstrating good compatibility in handling variations in chemical species, catalyst concentration, gas and liquid phase pressure drops. Results indicated that the contribution of mass transfer significantly outweighs pressure drop in increasing bubble size.
A mathematical model entitled varying-bubble model (V-BM) was adapted to simulate a slurry bubble-column reactor, operating in a churn-turbulent regime, based on an axial-dispersion model. This model was theoretically able to estimate the size of forming bubbles at the sparger, variations of each chemical species and catalyst concentration, pressure drop in both gas and liquid phases, change in size and rising velocity of bubbles, as well as gas holdup and specific gas-liquid interfacial area along the reactor axis. A comparison between the V-BM and single-bubble model (S-BM) indicates that the V-BM is better compatible with the experimental data. The results demonstrate that the contribution of mass transfer is much more than the pressure drop in increasing the size of the bubble along the reactor.
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