چكيده به لاتين
In this study, a fuel desulfurization process was carried out by the EODS method using Boron Carbide (B4C), which is an inexpensive non-metallic catalyst, H2O2 as an oxidant, and a simulated fuel that contained one of the most important sulfur compounds, namely DBT. The BBD-RSM was utilized to examine the effects of the reaction temperature, O/S ratio, catalyst dosage, and stirring speed to predict the parametric response of DBT removal across the entire experimental region using regression and statistical analysis. The experimental data for DBT removal ranged from 51.6 to 100%. According to the BBD-RSM results, a quadratic model was chosen for the EODS system, studied in this research. The effect of the temperature variable and the stirring speed was greater than the quantity of the catalyst and O/S ratio. All four variables were statistically significant. The interactions between temperature and O/S (x1x2) variables and temperature and stirring speed (x1x4) were statistically significant. The optimal parameters for the EODS system were x1:50 °C (reaction temperature), x2:6 (O/S ratio), x3: 0.09 g (catalyst amount), and 2500 rpm for x4:stirring speed, which resulted in the removal of 100% DBT in the model fuel in 30 minutes. This study effectively confirmed the correlation between the investigated variables and sulfur conversion (R2 = 0.9943) with its findings. This study entails the estimation of the kinetic parameters for the EODS reaction. The kinetics research revealed that the EODS reaction followed a pseudo-first-order reaction with an activation energy of 35.43 kJ/mol. The catalyst could be recovered 12 times while maintaining its structural integrity. On the actual fuel, the catalyst exhibited a 64.4% removal rate. This study is expected to reveal a novel application for the B4C catalyst. Also, in this research, boron carbide was magnetized and boron carbide-magnetite was created, and the EODS process was also performed with this catalyst, and the catalyst was effectively recovered.
