removal of dibenzothiophene using activated carbon/γ-fe2o3 nano-composite: kinetic and thermodynamic investigation of the removal process
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2015
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Abstract
In the present study, removal of dibenzothiophene (DBT) from model oil (n-hexane) was investigated using magnetic activated carbon (MAC) nano-composite adsorbent. The synthesized nano-composite was characterized by FT-IR, FE-SEM, BET and VSM techniques. The MAC nano-composite exhibited a nearly superparamagnetic property with a saturation magnetization (Ms) of 29.2 emu g-1, which made it desirable for separation under an external magnetic field. The magnetic adsorbent afforded a maximum adsorption capacity of 38.0 mg DBT g-1 at the optimized conditions (adsorbent dose, 8 g l-1; contact time, 1 h; temperature, 25 °C). Langmuir, Freundlich and Temkin isotherm models were used to fit equilibrium data for MAC nano-composite. Adsorption process could be well described by the Langmuir model. Kinetic studies were carried out and showed the sorption kinetics of DBT was best described by a pseudo-second-order kinetic model. In addition, the MAC nano-composite exhibited good capability of recycling to adsorb DBT in gasoline deep desulfurization.
| Reference Key |
fayazi2015analyticalremoval
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|---|---|
| Authors | ;Maryam Fayazi;Mohammad Ali Taher;Daryoush Afzali;Ali Mostafavi |
| Journal | critical care research and practice |
| Year | 2015 |
| DOI |
10.22036/abcr.2015.10158
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