Calculation of the straight and cross diffusion coefficients of a two-component mixture in a microporous zeolitic structure |
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| Affiliation: | 1. School of Materials Science and Engineering, Beihang University, No. 37 Xueyuan Road, Beijing 100191, PR China;2. School of Mechanical Engineering and Automation, Beihang University, No. 37 Xueyuan Road, Beijing 100191, PR China;3. Xi''an Thermal Power Research Institute Co., Ltd., Xi''an 710032, PR China;1. Department of Higher Mathematics and Mathematical Physics, Faculty of Physics, Saint-Petersburg State University, Russian Federation;2. Diamond Electronics Laboratory, Institute of Applied Physics — Nizhny Novgorod, Russian Federation;3. Dept. of Physics, St. Petersburg Electrotechnical University, Russian Federation |
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| Abstract: | A method is given which enables calculation of straight and cross diffusion coefficients of a two-component mixture adsorbed on a microporous adsorbent at constant pressure conditions. In particular, the method involves the solution of the reverse problem of calculating the matrix of diffusion coefficients on the basis of the experimental uptake curves of binary mixture adsorption. In this Paper, the method is illustrated for a binary n-hexane—ammonia mixture adsorbed on CaA type zeolite. The occurrence of a negative cross diffusion coefficient is also shown. |
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