Hydrodynamic effect of oxygenated byproduct during Fischer-Tropsch synthesis in slurry bubble column

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The Fischer-Tropsch reaction was performed using a pilot-scale slurry bubble column reactor (SBCR) and a lab-scale continuous stirred tank reactor (CSTR). In contrast to the CSTR, a transitory induction period was observed in the SBCR. In this study, we investigated the catalyst performance during the induction period focusing on the hydrodynamic parameter changes inside the reactor. We measured the hydraulic pressure for the constant slurry thickness during FTS reaction. The FT wax product was regularly withdrawn using a metal filter and analyzed for density, oxygen concentration, and compositional analysis. The liquid density was affected by the dilution of the initial liquid media by fresh FT product for the whole reaction time of 180 h. On the other hand, the oxygen concentration increased sharply for the initial 85 h and then reached the steady state. Accordingly, the gas hold-up and CO conversion were enhanced for the same period. The increase in the gas hold-up could be explained by the coalescence inhibition effect of oxygenated compounds, which were the main byproducts when iron-based catalysts were used. The dynamic gas disengagement technique was employed to identify the coalescence inhibition effect of alcohol in the hydrocarbon system using a cylindrical acrylic bubble column. (C) 2013 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE SA
Issue Date
2013-04
Language
English
Article Type
Article
Keywords

IRON-BASED CATALYST; GAS HOLD-UP; REGIME TRANSITION; MASS-TRANSFER; ACTIVATION; PRESSURE; PERFORMANCE; REACTOR; COALESCENCE; HYDROCARBON

Citation

CHEMICAL ENGINEERING AND PROCESSING, v.66, pp.27 - 35

ISSN
0255-2701
DOI
10.1016/j.cep.2013.01.007
URI
http://hdl.handle.net/10203/173864
Appears in Collection
CBE-Journal Papers(저널논문)
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