## Abstract Sorption and desorption in zeolites (molecular sieves) have to be considered as complex processes, involving simultaneous diffusion in zeolite crystals, mass transfer in the intercrystalline void of a pellet, and heat transfer between the zeolitic sorbent and its surroundings. The kinet
Sorption in zeolites—II. Tracer diffusion
✍ Scribed by M.G. Palekar; R.A. Rajadhyaksha
- Publisher
- Elsevier Science
- Year
- 1985
- Tongue
- English
- Weight
- 328 KB
- Volume
- 40
- Category
- Article
- ISSN
- 0009-2509
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✦ Synopsis
The objective of the paper is to investigate the relationship between tracer diffusivity and intrinsic diffusivity for sorption in ZeoJites. It is argued that this relationship cannot be derived from irreversible thermodynamics. Dependence of tracer diffusivity on sorbate concentration for Langmuirian sorbed phase. is investigated using irreversible thermodynamics. The analysis indicates that the reported relationship between tracer diffusivity and intrinsic diffusivity derived from molecular models are consistent with irreversible
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Published kinetic and equilibrium data for the sorption of ethane in various cationic forms of type A zeolite are discussed and interpreted in comparison with experimental data, obtained by the authors, for the SA Linde zeolite. It is shown that the equilibrium data for all the zeolites can be corre
Diffusion coefficients of esAl, 44Ti, 51Cr, 54Mn. jsFe, 6oC~, g'Zr and "'%b have been measured in u-Zr single crystals at temperatures close to 84O'C. The diffusion coefficients of Al, Ti. Zr and Sb, which are in the range lo-'\*-lo-'2 cms/sec, appear to correspond with normal substitutional diffusi