چكيده به لاتين
There are several methods for desulfurization of fuel, among which the existing methods, oxidation desulfurization is one of the methods that is considered to remove sulfur compounds from fuels. In this method, a solvent is required that deep eutectic solvents have been considered due to their good physical and chemical properties as well as environmental compatibility. Researchers have recently concluded that the addition of ion-mediated metal ions to deep eutectic solvents can enhance the efficiency of these solvents. In order to more study and investigate this method in this dissertation, a deep eutectic solvent whose include paratoluene sulfonic acid, choline chloride and iron ion, as a catalyst and solvent extracting , in the process. hydrogen proxide was used as the oxidizer alongside the solvent to remove di-benzothiophene from normal Decan fuel. In order to good mix and move the reaction better, ultrasound was used. The amount of iron ions, the amount of oxidant and the amount of sulfur in the fuel were considered as three important parameters in this process and were optimized through the response surface method based on the central compound. The optimal values of these parameters to achieve 99.39% desulfurization of 25 ml of model fuel in three minutes are: 0.26 molar ratio of iron ion to choline chloride, 0.39 ml of oxidant and 500 ppm of sulfur Then, the effect of each of these three parameters on the rate of desulfurization was investigated. The results showed that among these three parameters, the oxidizing parameter has the greatest effect on the percentage of removal of sulfur compounds. In the last step, experiments were performed with the optimal solvent on real diesel fuel, which resulted in 96% desulfurization, which is acceptable compared to the results of other researchers
