Document Type

Article

Publication Date

2-6-2002

Journal or Book Title

Industrial & Engineering Chemistry Research

Volume

41

Issue

3

First Page

63

Last Page

641

DOI

10.1021/ie010676i

Abstract

Bubble diameter measurements in a two-dimensional cocurrent bubble column are obtained using a gas−liquid−solid system in which the solid component is a cellulose fiber. Flash X-ray radiography, a noninvasive measurement technique, is used to record bubble size in the opaque slurry at various operating conditions. Results are presented for a range of fiber mass fractions (0 ≤ C ≤ 1.5%), a range of superficial gas velocities (1 ≤ υg ≤ 4 cm/s), two superficial liquid velocities (υl = 1 or 2 cm/s), and two column heights (H = 15−40 or 115−140 cm). Bubbles are categorized as either large (dB > 10 mm) or small (dB ≤ 10 mm), and all bubble diameter distributions can be characterized by log-normal distributions. The presence of fibers has the most significant effect on the large bubble size and population, even at mass fractions as low as 0.5%. In general, the large bubble size and population increases with column height, superficial gas velocity, and fiber mass fraction.

Comments

Reprinted with permission from Industrial & Engineering Chemistry Research 41 (2002): 632–641, doi:10.1021/ie010676i. Copyright 2002 American Chemical Society.

Copyright Owner

American Chemical Society

Language

en

File Format

application/pdf

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