Aplicación de modelos difusionales y modelos cinéticos en la interpretación de las cinéticas de adsorción de piridina sobre carbón activado granular
[EN] In this work, a surface diffusion model (SDM) obtained in a previous work was validated in a wide range of experimental conditions to predict the adsorption kinetics of pyridine on activated carbon. Moreover, the predictions of SDM model were compared with those obtained by using the first and second-order kinetic models. The results showed that the secondorder model adjusted satisfactorily the experimental data and fitted the experimental data much better than the first-order kinetic model. The effect of the stirring speed, mass of pyridine adsorbed, (qe), and temperature on the rate constant of the secondorder model, (k2), was analyzed and equations were proposed to correlate k2 as functions of qe and temperature. Nevertheless, the dependence of k2 regarding the temperature, stirring speed and qe cannot be accurately correlated. On the other hand, the SDM model provided a much better prediction than the second order kinetic model. The surface diffusion can be readily estimated from a correlation recommended in this work, whereas the k2 could not be predicted for some of the experimental conditions studied in this work.
| Main Authors: | , , , |
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| Format: | artículo biblioteca |
| Language: | Spanish / Castilian |
| Published: |
Grupo Español del Carbón
2013-12
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| Online Access: | http://hdl.handle.net/10261/102702 |
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