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Empirical correlations for axial dispersion coefficient and Peclet number in fixed-bed columns
Journal of Chromatography A, 2017In this work, a new correlation for the axial dispersion coefficient was obtained using experimental data in the literature for axial dispersion in fixed-bed columns packed with particles. The Chung and Wen correlation, the De Ligny correlation are two popular empirical correlations. However, the former lacks the molecular diffusion term and the latter
Tingyue Gu, Seyed Omid Rastegar
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MEASUREMENT OF AXIAL DISPERSION COEFFICIENT IN A PACKED BED USING X-RAY
Materials and Manufacturing Processes, 2002 Dispersion of the liquid in a porous media is of great importance in many areas of engineering and has been studied by several researchers so far. A new experimental method has been developed to measure the dispersion coefficient. X-ray absorption technique provides a better understanding of dispersion that characterizes the mixing phenomenon in the ...
Basavaraj, MG, Gupta, GS
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Measurement of the axial dispersion coefficient of cohesive powders in rotary kilns
, 2016 While continuous rotary calcination is a widely used thermal treatment in large-scale catalyst manufacturing, fundamental understanding of the process is absent from scientific literature. Thus, the goal of this research is to improve fundamental understanding of rotary calcination processes to aid in scale-up.
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Effective axial dispersion coefficients in packed beds under supercritical conditions
Journal of Supercritical Fluids, 1998Abstract Effective axial dispersion coefficients Dax in packed beds were measured by the chromatographic method at 313.2 K both for supercritical CO2 in the pressure range from 11 to 35 MPa and for organic solvents at atmospheric pressure. The Dax values were correlated with the Reynolds number, Schmidt number, binary diffusivity and bed void ...
Toshitaka Funazukuri, Seiichiro Kagei
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Experimental Thermal and Fluid Science, 2017 Abstract The aim of the present work is to propose a simple, reliable and effective model of hydrodynamics in fluidized bed reactor (FBR). The long-term objective of these models is to be able to use them for modeling and optimization of adsorption processes in fluidized bed columns.
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Axial diffusion effect on concentration dispersion
International Journal of Heat and Mass Transfer, 2015 This work presents an analytical attempt to illustrate the effect of axial diffusion on concentration dispersion in packed tube flows. The concentration moment method is applied to derive the analytical solution for time-dependent Taylor dispersion ...
Zi Wu, G Q Chen
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