Approximation of intraparticle mass transfer in adsorption processes—II. Non-linear systems

✍ Scribed by Chuncai Yao; Chi Tien

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 785 KB
• Volume: 47
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(92)80034-a

✦ Synopsis

The analysis given in Part 1 ( Yao and Tien, 1991) was extended to systems with non-linear adsorption isotherms. For systems with non-linear adsorption isotherms, the equivalent linear driving force (LDF) expression of adsorbate uptake rate is actually a non-linear expression which can be obtained from the approximate solution of the intraparticle dilTusion equation by either the least-square method using parabolic proftle approximation or by the orthogonai collocation method with one collocation point. By approximating adsorbate profile with higher-order polynomials (or using a larger number of collocation points in applying the orthogonal collocation method) more accurate uptake rate expressions may be obtained.