Breakthrough curves for single solutes in beds of activated carbon with a broad pore-size distribution—II. Measuring and calculating breakthrough curves of phenol and indole from aqueous solutions on activated carbons
1986; Elsevier BV; Volume: 41; Issue: 3 Linguagem: Inglês
10.1016/0009-2509(86)87037-3
ISSN1873-4405
AutoresG. Reschke, K.‐H. Radeke, D. Gelbin,
Tópico(s)Covalent Organic Framework Applications
ResumoThe breakthrough curves of phenol and indole from aqueous solutions on four activated carbons have been measured under a range of experimental conditions. We obtained a break-time ranking of the carbons coinciding with the equilibrium capacities. The breakthrough curves are simulated using the two-zone surface diffusion model, and it is found that the measurements can be modelled applying the adsorption capacity values from equilibrium measurements if empty bed contact times exceed 4 min. The kinetic parameters estimated by curve-fitting are influenced by particle crushing, thus indicating the importance of macropore diffusion resistance. The two-zone model was necessary to describe diffusion in biporous active carbons, whereas in the case of a carbon with a narrow pore-size distribution a monopore model was sufficient for breakthrough curve simulation.
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