Capillary sorption coefficient

Calculate the plate height contributed by sorption-desorption mass transfer (nonequilibrium) through a uniform liquid layer (configuration factor q = 2/3) of thickness 1.0 x 10 3 cm coated on the inside of an open tubular (capillary) column. The gas velocity v is 10 cm/s. The solute retention ratio is 0.10 and its diffusion coefficient Ds through the stationary liquid is 1.0 x 10 5 cm2/s. 

Diffusivity data are available only for a limited number of polymer-solvent systems. This paper describes research that has led to the development of the use of capillary column inverse gas chromatography (IGC) for the measurement of diffusion coefficients of solute molecules in polymers at infinite dilution. The work has resulted in a precise, rapid technique for the diffusion measurements that circumvents the many problems attendant to classical sorption methods and packed column IGC methods. Initial results of the program appeared in two recent publications (1,2)- Some of the material introduced in those papers is discussed here to present background for... 

In the above sections, we have amply shown that capillary condensation occurs in the contact zones of elementary particles and the shape of isotherms measured up to a = 1 is determined by existing pore distributions of the porous materials. In addition, it has been shown by sorption methods that porous Vycor glass and Neobead C-5 are ideal porous bodies consisting of spherical elementary particles arranged in characteristic types of packing. Based on these idealized models, we have calculated the effective diffusion coefficients in these porous bodies. 

In 2002 year, Li and Zhu reported a new model for simulation of coupled heat and moisture transfer processes, considering the capillary liquid diffusion process in textile [15], which developed the liquid diffusion coefficient as a function of fiber surface energy, contact angle, and fabric pore size distribution. Based on this new model, Wang et al. [16] considered more the radiative heat transfer and moisture sorption and condensation in the porous textile, achieving more accurate simulation for the reaUstic situation. The governing equations of the model are shown as follows ... 

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