شماره ركورد كنفرانس :
5041
عنوان مقاله :
On design of the airlift with net draft tube reactor for determination of the hydrodynamic behavior and the mass transfer coefficient
Author/Authors :
A. Dejaloud Department of Chemical Engineering - Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran , F. Vahabzadeh Department of Chemical Engineering - Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran , F. Pajoum Shariati Chemical Engineering Department - Islamic Azad University Science and Research branch, Tehran, Iran
كليدواژه :
airlift with net draft tube , gas holdup , volumetric mass transfer coefficient , hydrodynamic characteristics
عنوان كنفرانس :
The 10th International Chemical Engineering Congress & Exhibition (IChEC 2018)
چكيده فارسي :
فاقد چكيده فارسي
چكيده لاتين :
Determinations of hydrodynamic and mass transfer parameters were carried out inside the airlift reactor with net draft tube (ALR-NDT) containing air-water system. For comparative purposes, data in the bubble column and airlift reactors was also obtained. The effect of air flow rate (QG) on gas holdup (εG), mixing time (tM), and volumetric mass transfer coefficient (kLa) were determined. The εG and kLa values in the ALR-NDT were obtained higher than the corresponding values in the airlift reactor over the entire range of QG studied (0.25-2 vvm). The decrease in tM was also considerable in the ALR-NDT indicated the improving role of the NDT in the column reactor by establishing the cross flow. The results showed that the presence of the NDT by forming small bubbles extended the homogeneous flow regime to higher air flow rates. The empirical correlations relating εG and kLa to superficial gas velocity (usg) were also presented
