دانلود مقاله Using Effective Diffusion Coefficient In Mass Transfer Estimation In Pulsed Sieve Plate Extraction Column
سال انتشار: ۱۳۹۱
محل انتشار: چهاردهمین کنگره ملی مهندسی شیمی ایران
تعداد صفحات: ۱۱
Auob Safari – Chemical engineering department, Islamic Azad University, Lamerd branch, Lamerd, Iran
Liquid-liquid extraction columns scale up and design requires accurately prediction of overall mass transfer coefficient Koc. Already many methods have been suggested by investigators topredict this coefficient. One of these methods is substitution of effective diffusion coefficient (Deff=RD) instead of diffusion coefficient (D) in Newman equation. We surveyed somecorrelations suggested for R, and compared their results with experimental data of water/acetone/toluene in a pulsed sieve-plate extraction column using axial dispersion model and finally a promising correlation has been developed by considering effect of pulse intensity and volumetric flow rate of phases by the average error of about 5% in Koca estimation.