محبوبه شیرانی

In this study deep eutectic solvent (DES) and magnetic multiwall carbon nanotube were synthetized and applied to remove dibenzothiophene from n-hexane. SEM, FT-IR, and NMR techniques were used for characterization of the synthesized DES and magnetic sorbent. The optimum conditions of 20 min, 25 °C, 100 mg, and 1 mL were obtained for time, temperature, amount of sorbent, and DES volume respectively. Under optimum conditions desulfurization percent of 92.5% was achieved. The applied sorbent was easily separated from the solution by a magnet due to its magnetic feature. Moreover, the deep eutectic solvent of tetrabutylammonium bromide/ acetic acid as extraction solvent was ecofriendly and regeneratable. Since, two techniques of adsorption and extraction desulfurization were combined for the proposed desulfurization process, the desulfurization percent over 91% were achieved after application of the method just once.