Mass overall volumetric

Kcfl Overall volumetric gas-pbase mass-transfer dilute systems kmoP[(s-m )(mole-fraction solute in gas)] (lbmol)/[(b-ft (mole-fraction solute in gas)]... 

Volumetric Mass-Transfer Coefficients and Kia Experimental determinations of the individual mass-transfer coefficients /cg and /cl and of the effective interfacial area a involve the use of extremely difficult techniques, and therefore such data are not plentiful. More often, column experimental data are reported in terms of overall volumetric coefficients, which normally are defined as follows ... 

Extrapolation of KgO data for absorption and stripping to conditions other than those for which the origin measurements were made can be extremely risky, especially in systems involving chemical reactions in the liquid phase. One therefore would be wise to restrict the use of overall volumetric mass-transfer-coefficient data to conditions not too far removed from those employed in the actual tests. The most reh-able data for this purpose would be those obtained from an operating commercial unit of similar design. 

Traditional Design Method The traditionally employed conventional procedure for designing packed-tower gas-absorption systems involving chemical reactions makes use of overall volumetric mass-transfer coefficients as defined by the equation... 

Interfacial Area This consideration in agitated vessels has been reviewed and summarized by Tatterson (op. cit.). Predictive methods for interfacial area are not presented here because correlations are given for the overall volumetric mass transfer coefficient liquid phase controlhng mass transfer. 

Measurements simply of the extent of extrac tion in an agitated vessel lead to the overall Volumetric mass-transfer coefficients, Kca, or... 

The plot of the rate of disappearance of CO per volume of liquid in the serum bottles versus partial pressure of CO in the gas phase based on (3.14.4.14) could give the constant slope value of KLa/H. Henry s constant is independent of the acetate concentration but it is only dependent on temperature. The overall volumetric mass transfer coefficient can be calculated based on the above assumption. The data for various acetate concentrations and different parameters were plotted to calculate the mass transfer coefficient. 

Overall volumetric productivity Qp (mol.m s ) (it is also common to use a yearly basis) is the average production capacity per unit volume and time of the bioreactor. The overall volumetric productivity is confined, on the one hand, by physical constraints, such as mass and heat transfer, and, on the other hand, by biocatalyst concentration... 

The packed density of the bed, the void fraction of the particle bed, and the density ofthe feed solution are 386 kg m , 0.5, and 1000 kg m , respectively. The averaged overall volumetric coefficient of mass transfer is 9.2 h , and a constant pattern of the adsorption zone can be assumed in this case. 

Overall Mass-Transfer Coefficient In systems with relatively sparing soluble gases, where the gas-phase resistance is negligible, the mass-transfer rate can be determined by using the concept of an overall volumetric mass-transfer coefficient kLa as follows ... 

The overall volumetric mass transfer coefficients measured by pure oxygen absorption were expressed as a function of the total specific power dissipated in the liquid as follows ... 

Kia Overall volumetric gas-phase mass-transfer dilute systems (lbmol)/[(hft3)(lbf/in2 solute partial pressure)]... 

KLa Overall volumetric liquid-phase mass-transfer coefficient kmol/[(s-m3)(mole-fraction (lb m ol)/[ (h ft3) (mole-fraction... 

Here, Gg is the mass flux of gas, /4C is the gas-phase concentration of the reactant, P is the total gas pressure, KGaL is the overall volumetric mass-transfer coefficient, and Z is the axial distance along the length of the reactor. Integrating the above equation from the reactor inlet to its outlet gives... 

Overall volumetric mass-transfer coefficient more than five times larger than that of the packed bed device [19]... 

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