摘要
The adsorption of dibenzofuran (DBF) on three commercial granular activated carbons (GAC) was in-vestigated to correlate the adsorption equilibrium and kinetics with the morphological characteristics of activated carbons. Breakthrough experiment was conducted to determine the isotherm and kinetics of dibenzofuran on the ac-tivated carbons. All the experiment runs were performed in a fixed bed with a process temperature of 368 K. The effects of adsorbent morphological properties on the kinetics of the adsorption process were studied. The equilib-rium data are found satisfactory fitted to the Langmuir isotherm. An intraparticle diffusion model based on the ob- tained Langmuir isotherm was developed for predicting the fixed bed adsorption of dibenzofuran. The result indi- cated that this model fit all the breakthrough curves well. The surface diffusion coefficients of dibenzofuran on the activated carbon are calculated, and a relationship with the microperosity is found. As it was expected, the diben-zofuran molecule finds more kinetic restrictions for the diffusion in those carbons with narrower pore diameter.
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