Gas hold‐up behavior of mechanically agitated gas‐liquid reactors using pitched blade downflow turbines
作者:
V. B. Rewatkar,
A. J. Deshpande,
A. B. Pandit,
J. B. Joshi,
期刊:
The Canadian Journal of Chemical Engineering
(WILEY Available online 1993)
卷期:
Volume 71,
issue 2
页码: 226-237
ISSN:0008-4034
年代: 1993
DOI:10.1002/cjce.5450710209
出版商: Wiley Subscription Services, Inc., A Wiley Company
关键词: stirred tanks;gas–liquid reactors;fractional gas hold‐up;sparger design;mechanically agitated reactors
数据来源: WILEY
摘要:
AbstractFractional gas holdup was measured in 0.57, 1.0, and 1.5 m i.d. vessels. Pitched blade downflow turbines (PTD) were used as the impeller. Design details of the impeller, such as the impeller diameter (0.22 T to 0.5 T) and blade width (0.25 D to 0.4 D), were studied. The effect of sparger type, geometry and size on fractional gas hold‐up has been investigated in detail. Four different types of spargers (pipe, conical, ring and concentric ring spargers) were used. Sparger location was varied for all the types studied. Further, design details of the ring sparger, which gave the highest hold‐up were then studied in detail. These included ring diameter, number of holes and hole size. All the reported correlations for fractional gas hold‐up in mechanically agitated gas‐liquid reactors were tested and compared. A better correlation has been developed for pitched blade t
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