Note that the mass transfer coefficients are higher in the packed bubble bed reactor compared to those in the trickle-bed reactor under the same conditions, as expected. The intraparticle phenomena: The next step is the evaluation of the internal effectiveness factor. The unknown parameter is the...
Effective mass transfer coefficients for randomly packed fiber bundles can be much lower than for regularly packed fiber bundles for a given fiber packing fraction and Graetz number. Regions of higher fiber packing have lower flow and experience greater mass transfer than regions of lower fiber ...
Implementation of this technology required the development of a novel methodology for determination of mass transfer coefficients. The use of Cw technology also led to the development of new optimization schemes for both concentration and diafiltration. Industrial scale processes using constant Cw control ...
Experimental determinations of the local heat transfer by forced convection from model leaves heated by a constant energy flux were made in the laboratory under laminar and turbulent flow conditions.The results are expressed in a logarithmic dimensionless plot of the local Nusselt number, Nu d , aga...
1.Theadsorption equilibrium constants and the mass transfer coefficients of mentioned anionsurfactants on liquid / solid interface at several temperatures and flow rates arc calculatedby the Fourier analysis method.上述体系阴离子表面活性剂在液/固界而的吸附平衡常数和传质系数。 5)Adsorption rate constant吸...
The dipole moment in the gaseous phase was found to be (1.91 {+-} 0.19) D, and in the liquid phase (3.54 {+-} 0.01) D. The authors present values of the first three dielectric virial coefficients in the gaseous phase.关键词: chemistry energy conservation, consumption, and utilization ...
By solving numerically the continuity mass-conservation equation with the corresponding boundary conditions, the lumen laminar mass-transfer coefficients for both cases are correlated. The correlations greatly improve the calculating accuracy of the overall mass-transfer coefficient and can be used to ...
12.PEEDICTING AQUEOUS SOLUBILITY AND OCTANOL/ WATER PARTITION COEFFICIENTS OF ORGANIC CHEMICALS FROM MOLAR VOLUME摩尔体积预测有机物水的溶解度和辛醇/水分配系数 13.mobile phase:acetonitrile and 0.4% acetic acidwater,gradient elute;流动相:乙腈-体积分数为0.4%的乙酸水溶液梯度洗脱; 14.concentration coeffic...
An analysis of the effects of fiber packing on mass transfer coefficients for axial fluid flow through fiber bundles with uniform wall flux in the well-developed limit is presented. The finite element method is used to solve the governing momentum and conservation of mass equations. The effective...
A comparison of these coefficients illustrates again the dominance of the London dispersion force (non-zero frequency terms) over the Keesom and Debye interactions. For Al2O3 in air or a vacuum we obtain A131(air)=14x10−20J Similarly, for Al2O3 in water, A131(air)=4.2 x 10...