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

doi:10.1016/j.cjche.2016.06.007

Abstract

Abstract: 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.

Key words: Perforated rotating disk contactor, Mass transfer coefficient, dispersed phase holdup, Interfacial area

摘要： 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.

关键词: Perforated rotating disk contactor, Mass transfer coefficient, dispersed phase holdup, Interfacial area

Mehdi Asadollahzadeh, Alireza Hemmati, Meisam Torab-Mostaedi, Mansour Shirvani, Ahad Ghaemi, ZahraSadat Mohsenzadeh. Use of axial dispersion model for determination of Sherwood number and mass transfer coefficients in a perforated rotating disc contactor[J]. , 2017, 25(1): 53-61.

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