Use of axial dispersion model for determination of Sherwood number and mass transfer coefficients in a perforated rotating disc contactor

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• 作者：Mehdi Asadollahzadeh¹ ; ^{masadollahzadeh@aeoi.org.ir} ; Alireza Hemmati² ; Meisam Torab-Mostaedi¹ ; Mansour Shirvani² ; Ahad Ghaemi² ; ZahraSadat Mohsenzadeh³
• 关键词：Perforated rotating disk contactor ; Mass transfer coefficient ; dispersed phase holdup ; Interfacial area
• 刊名：Chinese Journal of Chemical Engineering
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：25
• 期：1
• 页码：53-61
• 全文大小：929 K
• 卷排序：25

文摘

The mass transfer process in a perforated rotating disk contactor (PRDC) using a toluene–acetone–water system was investigated. The volumetric overall mass transfer coefficients are calculated in a PRDC column. Both mass transfer directions are considered in experiments. The influences of operating variables containing agitation rate, dispersed and continuous phase flow rates and mass transfer in the extraction column are studied. According to obtained results, mass transfer is significantly dependent on agitation rate, while the dispersed and continuous phase flow rates have a minor effect on mass transfer in the extraction column. Furthermore, a novel empirical correlation is developed for prediction of overall continuous phase Sherwood number based on dispersed phase holdup, Reynolds number and mass transfer direction. There has been great agreement between experimental data and predicted values using a proposed correlation for all operating conditions.