Packed columns Onda correlations

Onda s Correlations for Randomly Packed Columns Onda et al. (1968) developed correlations of mass transfer coefficients for gas absorption, desorption, and vaporization in randomly packed columns. The vapor-phase mass transfer coefficient is obtained from... 

Onda et al. [9] developed the following correlation for in packed columns. The correlation is considered suitable for most packing elements, with the exception of Pall rings. A requirement for using this correlation is that the mass transfer area (fly) is estimated using some other correlation ... 

Bravo and Fair s Correlation for Randomly Packed Columns Bravo and Fair (1982) developed a method of estimating the mass transfer characteristics for distillation in randomly packed columns. Their method is based on Onda s Eqs. 12.3.26 and 12.3.29 for the vapor-and liquid-phase mass transfer coefficients, but uses an alternative correlation for the interfacial area density... 

Arwickar (1981) reported some results for distillation under total reflux conditions of the system acetone-methyl acetate-methanol. The experiments were carried out in a laboratory scale column of 7.62 cm diameter packed with 0.635 cm Raschig rings. The simulation of total reflux operations using the nonequilibrium model is discussed by Krishnamurthy and Taylor (1985a). In simulations of Arwickar s experiments Taylor et al. used the correlations of Onda et al. (1968) to estimate the mass transfer coefficients in each phase and the effective interfacial area. The average absolute discrepancy between predicted and measured mole fractions was less than 2 mol% for acetone and methyl acetate and less than 4 mol% for methanol. 

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