TITLE: Polydispersed Solids Behavior in a Bubble Column.

AUTHOR: D. N. Smith;   J. A. Ruether;   G. J. Stiegel.

INST.  AUTHOR: Department of Energy, Pittsburgh, PA. Pittsburgh Energy Technology Center.

SPONSOR: Department of Energy, Washington, DC.

LANGUAGE: English

PUB.  TYPE: Technical Report

PUB.  COUNTRY: United States

SOURCE: Department of Energy [DE],  1984,  36p.

NTIS ORDER NO.: DE85013463/INW

NOTES: AIChE annual meeting, San Francisco, CA, USA, 25 Nov 1984.

ABSTRACT:

New data and theory are presented for describing polydispersed solids in slurry bubble columns. Axial solids concentration distributions were measured in a 0.108-m-ID slurry bubble column apparatus operated at steady-state conditions. Slurry and gas superficial velocities ranged from 0.007 to 0.02 m/s and 0.03 to 0.20 m/s, respectively. The liquid phase was water and the solid phase consisted of binary or ternary mixtures of narrow-sized fractions of glass spheres. The experimental data have been used to develop a method for predicting average solids loadings and axial distributions of solids in a bubble column with a one-dimensional sedimentation-dispersion model. Correlations are given for the hindered settling velocity, the solids dispersion coefficient, and the solids concentration at the top and bottom of the column. The effect of a distribution of particle size is interpreted by summation of the concentration of solids for each discrete particle size fraction. 12 refs., 13 figs. (ERA citation 10:035889)

REPORT  NUMBER: CONF-841121-20