Adsorption of Polycyclic Aromatic Hydrocarbons from Heavy Naphthenic Oil Using Commercial Activated Carbons. 1. Fluid-Particle Studies
2016
Luna, F. Murilo T. | Oliveira Filho, A Nilson | Araújo, Caio C. B. | Azevedo, Diana C. S. | Cavalcante, Celio L.
In this study, the adsorption of polyaromatic hydrocarbons (PAHs) from heavy naphthenic oils (HNOs) on commercial activated carbons was evaluated. Among the aromatics, polycyclic aromatic hydrocarbons (PAHs) are usually present in heavy oils and are contaminants that have potential carcinogenic and mutagenic characteristics. Oils with of PAH concentration less than 3 wt % are labeled as noncarcinogenic. The HNO samples used in this study had a high content of PAHs (ca. 8 wt %). Batch experiments were carried out to evaluate the adsorption capacity of activated carbons for PAHs (>160 mg/g), and to estimate the mass transfer parameters of the adsorption process. The pore diffusion model and the pore–surface diffusion model were applied to interpret and validate the kinetic experimental results. The results indicated the efficiency of activated carbons as potential adsorbent to adjust the polycyclic aromatics content of HNO.
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