Using semi-empirical algorithms in the development of linear driving force approximations for complex intraparticle diffusion/convection models

• Type: Article in International Conference Proceedings Book
• Date: 1996

Authors

Sheng, PZ (Author) Other; Adélio Mendes (Author) FEUP; Carlos Costa (Author) FEUP

Conference proceedings International

Title: Fundamentals of adsorption: Proccedings of the Fifth International Conference on Fundamentals of Adsorption

Pages: 821-828

5th International Conference on Fundamentals of Adsorption

Pacific Grove, California, USA, 13 a 18 de Maio de 1995

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Other information

Authenticus ID: P-001-F64

Abstract (EN): This paper focusses the construction of linear driving force like reduced models, for the intraparticle diffusion/convection of one or two Langmuir solutes in spherical particles under the influence of a surface periodic field. The methodology begins with the analysis of simple diffusion models like the pore diffusion model with linear equilibrium and then evolves to more complex situations like binary Langmuir isotherms and more complex intraparticle mass transport models. The discussion focus on the method to calculate the average intraparticle concentration and on the functional analysis of reduced model parameters dependence on frequency, amplitude and form of the perturbations. Then the analysis proceeds with the detection of a pattern and it is shown that the reduced model parameters can be obtained from the response to a square wave corrected for amplitude and frequency. Finally some formulas are presented for various operating conditions. The evaluation of the approximations is also discussed graphically and statistically.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8