書誌事項
- タイトル別名
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- Mass transfer characteristics in a three-phase fluidized bed containing low-density and/or small-size particles.
- テイ ミツド リュウシ オヨビ ショウリュウシ オ フクム 3ソウ リュウドウ
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Experiments were conducted to investigate the mass transfer characteristics in a three-phase fluidized bed under conditions of gas-liquid upward flow in a column of 6.5cm inside dimeter and 157cm height. The particles employed were five kinds of low-density and small-size particles : nylon-6 particles with diameter of 6.32 and 9.52mm, polystyrene particles of 3.1 mm, activated carbon particles of 650μm and glass beads of 550μm.<BR>The three-phase fluidized beds showed two distinct regimes, i.e., the complete three-phase fluidization regime and the partial suspension regime in which some particles exist in the freeboard region, depending on gas and liquid velocities.<BR>The liquid-phase volumetric mass transfer coefficient, kLa, was calculated using the axial dispersion model together with the axial oxygen concentration profile.<BR>It was found that kLa increases with increasing gas velocities. This trend is almost the same as that in conventional three-phase fluidized beds and bubble columns, whereas the absolute values of kLa in the case of low-density particles are always larger than those for bubble columns. The behavior of kLa values is correlated as a function of gas holdup and the modified particle Reynolds number based on the density difference between particles and fluids.
収録刊行物
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- 化学工学論文集
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化学工学論文集 16 (6), 1217-1223, 1990
公益社団法人 化学工学会
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詳細情報 詳細情報について
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- CRID
- 1390282679486374784
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- NII論文ID
- 130000871112
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- NII書誌ID
- AN00037234
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- COI
- 1:CAS:528:DyaK3MXovVWi
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- ISSN
- 13499203
- 0386216X
- http://id.crossref.org/issn/0386216X
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- NDL書誌ID
- 3692704
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可