زهرا معيني فر

This research investigates the process of removing sulfur from light naphtha due to the distillation of gas condensate an‎d various methods such as using caustic soda, sulfuric acid an‎d methanol to reduce the amount of sulfur an‎d mercaptan have been investigated. The main parameters including the concentration of these compounds have been selec‎ted as independent variables an‎d the amount of total sulfur as the dependent variable. The results show that increasing the concentration of soda an‎d methanol has a significant effect on sulfur reduction, while sulfuric acid has a milder effect. Also, statistical methods an‎d experimental design have been used to optimize these parameters. In the final results of experiments an‎d optimization, this research showed that various operating parameters such as the concentration of caustic soda, sulfuric acid an‎d methanol have a direct effect on reducing the total sulfur content in naphtha. By using the RSM response surface method an‎d the Benken-Box BBD experiment design, the experiments were designed in such a way that the mutual effects of these variables were investigated an‎d optimized. The final results showed that by increasing the concentration of caustic soda, the content of total sulfur decreases dramatically, because soda as a strong base reacts with sulfur compounds an‎d separates them from the environment. Also, increasing the concentration of sulfuric acid as an acid also leads to sulfur reduction, but its effect is less than that of caustic soda. Sulfuric acid provides the necessary conditions for the reaction with certain sulfur compounds, but the intensity of its reaction is lower than soda. Due to its polar nature, methanol improves the solubility of sulfur compounds an‎d helps to reduce sulfur content. Increasing the concentration of methanol also showed a positive effect in reducing sulfur. In the optimization section, optimal values for operating parameters were determined, which included soda concentration equal to 34.95%, sulfuric acid concentration equal to 39.88%, an‎d methanol concentration equal to 30%. These optimal values reduced the sulfur content to 151.992 ppm. The verification test with optimal conditions showed that the sulfur content was equal to 145.45 ppm, which has a small error with the model results an‎d shows the high accuracy of the optimization model. The results show that the development of experimental design, modeling an‎d simulation in the ODS process helps to identify the most important variables, facilitate future research an‎d achieve maximum sulfur removal. Each method has advantages an‎d disadvantages that should be considered when used in be considered Finally, research gaps in this field are discussed.

گوگردزدايي اكسيداتيو؛ نفتاي ترش سبك؛ كبالت فتالوسيانين سولفوناميد؛ روش سطح پاسخ

: desulfurization, light naphtha, Oxidative, adsorbent Cobalt Phthalocyanine, oxidative

zahra moeini far

ahad ghaemi