Modeling Gas Holdup in Gas−Liquid−Fiber Semibatch Bubble Columns
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Three gas holdup models are developed that correspond to different flow regimes in a 15.24-cm-diameter semibatch bubble column filled with various fiber suspensions. Three different perforated plate aerators are used and have open area ratios (A) of 0.57%, 0.99%, and 2.14%. Rayon fiber suspensions with lengths (L) of 3, 6, and 12 mm and cellulose fibers are used to form the fiber suspensions over a range of fiber mass fractions up to 1.8%. The models reproduce most of the data within ±15%. A limitation of the current models, due to limited experimental data, is that the model coefficients and exponents vary with aeration plate open area ratio and column diameter.
Reprinted with permission from Industrial & Engineering Chemistry Research 44 (2005): 9355–9363, doi:10.1021/ie050816e. Copyright 2005 American Chemical Society.