Flow Characteristics in Cocurrent Upflow Bubble Column Dispersed with Micro-Bubbles
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- Bando Yoshiyuki
- Department of Chemical Engineering, Nagoya University
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- Yoshimatsu Takashi
- Department of Chemical Engineering, Nagoya University
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- Luo Wenji
- Department of Chemical Engineering, Nagoya University
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- Wang Yufei
- Department of Chemical Engineering, Nagoya University
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- Yasuda Keiji
- Department of Chemical Engineering, Nagoya University
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- Nakamura Masaaki
- Department of Chemical Engineering, Nagoya University
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- Funato Yasuhiro
- Nagoya Oshima Machinery Co., Ltd.
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- Oshima Masataka
- Nagoya Oshima Machinery Co., Ltd.
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Abstract
The flow characteristics and decomposition performance in the cocurrent upflow bubble column dispersed with micro-bubbles were experimentally examined. A micro-bubble generator was installed at the bottom of the column, and for comparison the sintered glass gas sparger was set at the lower part of the column.<BR>When milli-bubbles coexist with dispersed micro-bubbles, micro-bubbles disappear. This is considered because micro-bubbles are absorbed into the wake of milli-bubbles. The volumetric mass transfer coefficient is higher for micro-bubbles than for milli-bubbles, but the mass transfer coefficient is much lower for the former than for the latter. The apparent decomposition rate constant strongly depends on the volumetric coefficient. When the volumetric coefficient is higher, the rate constant of micro-bubbles is higher than that of milli-bubbles.
Journal
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- JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
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JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 41 (7), 562-567, 2008
The Society of Chemical Engineers, Japan
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Details 詳細情報について
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- CRID
- 1390282679544808832
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- NII Article ID
- 10024192512
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- NII Book ID
- AA00709658
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- ISSN
- 18811299
- 00219592
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- NDL BIB ID
- 9585572
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed