Hydrodynamic and mass transfer parameters in a large-scale slurry bubble column reactor with high solid loading
The effects of pressure (P), superficial gas velocity (UG) and solid concentration (CV) on the equilibrium Solubility (C*), gas holdup (eG), volumetric gas-liquid mass transfer coefficient (kLa) and bubble size distribution for methane (CH{sub 4}) in a liquid mixture of decanes were statistically studied in a large-scale (1-ft diameter, 10-ft high) slurry bubble column reactor (SBCR). Glass beads with volumetric concentrations of 0, 7.6%, 18%, 28.4% and 36% were used. The experiments were selected following the central composite statistical design approach. The kLa values were determined using the transient physical absorption technique; the gas holdup was measured using the manometric method and the bubble size distributions were measured using the Dynamic Gas Disengagement technique (DGD). The equilibrium solubility values appeared to follow Henry's Law in the 1--15 bar range. The eG values were found to increase with superficial gas velocity and pressure due to the increase of the volume fraction of the small and large gas bubbles. The eG values, however, decreased with solid concentration due to the increase of slurry viscosity. The kLa values appeared to have the same trend as eG values indicting that the mass transfer behavior in the SBCR was mainly controlled by the gas-liquid interfacial area. Also, statistical correlations relating kLa and eG to the main process variables were proposed.
- Research Organization:
- Univ. of Pittsburgh, PA (US)
- OSTI ID:
- 20082312
- Resource Relation:
- Conference: Sixteenth Annual International Pittsburgh Coal Conference, Pittsburgh, PA (US), 10/11/1999--10/15/1999; Other Information: 1 CD-ROM. Operating systems required: Windows 95/98; Windows 3.X, Macintosh; PBD: 1999; Related Information: In: Sixteenth annual international Pittsburgh Coal Conference: Proceedings, [2000] pages.
- Country of Publication:
- United States
- Language:
- English
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