Two-bubble class model for churn-turbulent regime in a bubble column slurry reactor of Fischer-Tropsch synthesis

A model for a bubble column slurry reactor is developed based on the experi ment of Rhenpreussen-Koppers demonstration plant for slurry phase Fischer-T ropsch synthesis reported by Koelble ct al. This model is applicable to the operation in the churn-turbulent regime and incorporates the information o n the bubble size. The axial dispersion model is adopted to describe the fl ow characteristics of the Fischer-Tropsch slurry reactor. With the model de veloped, simulations are performed to identify the steady state behavior of a Fischer-Tropsch slurry reactor of commercial size. Predictions of the tw o-bubble class model is compared with that of the conventional single- bubb le class model. The results show that under a variety of conditions, the tw o-bubble class model gives results different from those for the single-bubb le class model.