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KMID : 1024519970060010025
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Journal of the Environmental Sciences
1997 Volume.6 No. 1 p.25 ~ p.31
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Dynamic Behavior of an Internal Loop Reactor during Scale-up
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Choi Yoon-Chan
Park Young-Seek
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Abstract
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The variations of gas hold-up, overall volumetric oxygen mass transfer coefficients and liquid circulation velocity in an internal loop reactor were investigated to manifest scale-up effect. The relationship between superficial gas velocity and gas hold-up were found as Ugr = 0.045 r in the pilot-scale and Ugr = 0.056 r in the bench-scale reactor. The overall volumetric oxygen mass tractsfer coefficient, KLa was slightly increased in the pilot-scale than in the bench-scale reactor. Flow regime was changed from the bubble flow to the churn-turbulent flow when the superficial gas velocity reached to 3.5 - 4 cm/sec in the pilot-scale.
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KEYWORD
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internal loop reactor, scale-up, spuperficialgas velocity, gas hold-up, overall volumetric oxygen mass transfer coefficient, liquid circulation velocity
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