دورية أكاديمية
A Simple Method for Calculating the Overall Adsorption Rate Constant in the Wheeler–Jonas Equation
| العنوان: | A Simple Method for Calculating the Overall Adsorption Rate Constant in the Wheeler–Jonas Equation |
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| المؤلفون: | Chongyang Zhou, Shujuan Feng, Gouqing Zhou, Yuren Jin, Junfu Liang, Jingming Xu |
| المصدر: | Adsorption Science & Technology, Vol 29 (2011) |
| بيانات النشر: | SAGE Publications, 2011. |
| سنة النشر: | 2011 |
| المجموعة: | LCC:Physical and theoretical chemistry |
| مصطلحات موضوعية: | Physical and theoretical chemistry, QD450-801 |
| الوصف: | Use of the Wheeler–Jonas (WJ) equation to predict adsorbate breakthrough for a packed bed of granular activated carbon requires the calculation of the overall adsorption rate constant (k ν ) and the amount adsorbed. These quantities can be calculated from the intercept (A) and slope (B) of a linear fit to the elapsed time as a function of the logarithm of the ratio of the adsorbate concentration (C 0 – C x )/C x based on the breakthrough curve. Because k ν varies with the flow rate (F), numerous measurements at different values of F were performed to find the appropriate value of k ν . One relatively simple method for calculating k ν directly from the WJ equation is presented and the physical meaning of A and B revealed. The key factors that lead to a simplified calculation of k ν are the ratio of the breakthrough time to the equilibrium time (t 0.05 /t 0.50 ) and the ratio of the equilibrium time to the saturation time (t 0.50 /t 0.95 ), both of which remain nearly constant for different values of F, concentration and temperature. Knowledge of k ν , A and B, and their relationships, are very helpful for predicting the breakthrough behaviour of packed bed adsorbents using the WJ equation. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 0263-6174 2048-4038 |
| Relation: | https://doaj.org/toc/0263-6174; https://doaj.org/toc/2048-4038 |
| DOI: | 10.1260/0263-6174.29.1.71 |
| URL الوصول: | https://doaj.org/article/1879a8e107da40fd990d8bc39dc69837 |
| رقم الأكسشن: | edsdoj.1879a8e107da40fd990d8bc39dc69837 |
| قاعدة البيانات: | Directory of Open Access Journals |
| تدمد: | 02636174 20484038 |
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| DOI: | 10.1260/0263-6174.29.1.71 |