چكيده به لاتين
Sulfur compounds in fuel are one of the most important factors of environmental pollution. That's why they have to be removed from the fuel. Hydrogen Desulfurization (HDS) is a common method for removing sulfur compounds that cannot remove aromatic sulfur compounds. For this reason, alternative methods have been developed for it.
In this study, the desulfurization of model oil (n-octane) with 1000 ppm Dibenzothiophene was investigated using deep eutectic solvent (DES) as a catalyst and extraction agent process, and in this process, hydrogen peroxide is used as an oxidizing agent and the temperature of 40 ° C is chosen as the process temperature. Choline chloride, tetrabutyl ammonium bromide and tetrabutyl ammonium chloride as a hydrogen bonding acceptors (HBA) and trichloroacetic acid, trifluoroacetic acid and toluene sulfonic acid are used as hydrogen bond donors (HBD) for synthesis of deep eutectic solvents. The DESs were characterized by Fourier transform infrared (FT-IR) and H nuclear magnetic resonance (H- NMR). Their density and kinematic viscosity are also measured.
At 40 ° C, the molar ratio of oxidizing to sulfur 3, and the volumetric ratio of fuel to solvent 5, chlorine / trichloroacetic acid shows the highest rate of desulfurization. After selecting the best solvent, the optimal process conditions are investigated by the Taguchi experimental design method. At a temperature of 30 ℃, the molar ratio of oxidizing to sulfur 5 and the volume ratio of fuel to solvent 5 are obtained as optimal conditions. Finally, the removal of Dibenzothiophene, Benzothiophene and Thiophene under optimal conditions was 99%, 91% and 86%, respectively
