Hydrodynamics and Mass Transfer of Oily Micro-emulsions in An External Loop Airlift Reactor

doi:10.1016/S1004-9541(14)60050-1

Chinese Journal of Chemical Engineering ›› 2014, Vol. 22 ›› Issue (3): 267-273.DOI: 10.1016/S1004-9541(14)60050-1

Hydrodynamics and Mass Transfer of Oily Micro-emulsions in An External Loop Airlift Reactor

Mona Ebrahimi Fakhari¹, Mostafa Keshavarz Moraveji², Reza Davarnejad¹

1 Department of Chemical Engineering, Faculty of Engineering, Arak University, Arak 38156-8-8349, Iran;
2 Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), 424 Hafez Avenue, Tehran 15875-4413, Iran

收稿日期:2012-12-07 修回日期:2013-08-18 出版日期:2014-03-28 发布日期:2014-03-05
通讯作者: Mostafa Keshavarz Moraveji

Hydrodynamics and Mass Transfer of Oily Micro-emulsions in An External Loop Airlift Reactor

Mona Ebrahimi Fakhari¹, Mostafa Keshavarz Moraveji², Reza Davarnejad¹

1 Department of Chemical Engineering, Faculty of Engineering, Arak University, Arak 38156-8-8349, Iran;
2 Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), 424 Hafez Avenue, Tehran 15875-4413, Iran

Received:2012-12-07 Revised:2013-08-18 Online:2014-03-28 Published:2014-03-05
Contact: Mostafa Keshavarz Moraveji

摘要/Abstract

摘要： This study reports an experimental investigation on hydrodynamics and mass transfer characteristics in a 15.6×10^-3 m³ external loop airlift reactor for oil-in-water micro-emulsions with oil to water volume ratio (φ) ranging from 3% to 7% (by volume). For comparative purposes, experiments were also carried out with water. Increase in φ of micro-emulsion systems results in an increment in the gas holdup and a decrease in the volumetric gas-liquid oxygen transfer coefficient and liquid circulation velocity, attributed to the escalation in the viscosity of micro-emulsions. The gas holdup and volumetric mass transfer coefficient for micro-emulsion systems are significantly higher than that of water system. Two correlations are developed to predict the gas holdup and oxygen transfer coefficient.

关键词: external loop airlift reactor, hydrodynamics, micro-emulsions, oxygen transfer

Abstract: This study reports an experimental investigation on hydrodynamics and mass transfer characteristics in a 15.6×10^-3 m³ external loop airlift reactor for oil-in-water micro-emulsions with oil to water volume ratio (φ) ranging from 3% to 7% (by volume). For comparative purposes, experiments were also carried out with water. Increase in φ of micro-emulsion systems results in an increment in the gas holdup and a decrease in the volumetric gas-liquid oxygen transfer coefficient and liquid circulation velocity, attributed to the escalation in the viscosity of micro-emulsions. The gas holdup and volumetric mass transfer coefficient for micro-emulsion systems are significantly higher than that of water system. Two correlations are developed to predict the gas holdup and oxygen transfer coefficient.

Key words: external loop airlift reactor, hydrodynamics, micro-emulsions, oxygen transfer

Mona Ebrahimi Fakhari, Mostafa Keshavarz Moraveji, Reza Davarnejad. Hydrodynamics and Mass Transfer of Oily Micro-emulsions in An External Loop Airlift Reactor[J]. Chinese Journal of Chemical Engineering, 2014, 22(3): 267-273.

Mona Ebrahimi Fakhari, Mostafa Keshavarz Moraveji, Reza Davarnejad. Hydrodynamics and Mass Transfer of Oily Micro-emulsions in An External Loop Airlift Reactor[J]. Chin.J.Chem.Eng., 2014, 22(3): 267-273.

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Hydrodynamics and Mass Transfer of Oily Micro-emulsions in An External Loop Airlift Reactor

Hydrodynamics and Mass Transfer of Oily Micro-emulsions in An External Loop Airlift Reactor

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