گوگردزدايي كاتاليزري ميعانات گازي با استفاده از اكسيدهاي فلزي واسطه داراي ساختار اسپينل

The presence of sulfur compounds in gas condensates is a major challenge for both the oil industry an‎d the environment. When present in hydrocarbon fuels, these compounds not only cause environmental pollution (such as acid rain an‎d the release of pollutant gases) but also lead to equipment corrosion during refining an‎d reduce the quality of petroleum products. Therefore, reducing the sulfur content of gas condensates is of particular importance. This study aimed to eva‎luate the efficiency of spinel catalysts an‎d their composites in the oxidative desulfurization (ODS) of gas condensates using hydrogen peroxide. To this end, seven spinel catalysts an‎d their corresponding composites were prepared via combustion synthesis, employing urea an‎d ammonium nitrate as fuels. Gas condensates from the South Pars field were used as the sulfur-containing feedstock. The ODS reaction was conducted in the presence of hydrogen peroxide as the oxidant at an optimal temperature range of 50–60 °C. In addition, the operating conditions (including temperature, reaction time, catalyst dosage, an‎d oxidant ratio) were optimized to achieve maximum desulfurization efficiency. The results showed that, under optimal conditions, some of the synthesized catalysts were capable of removing more than 76% of the sulfur compounds present in the gas condensates. Furthermore, the optimal values of temperature, reaction time, catalyst dosage, an‎d oxidant ratio were determined to maximize desulfurization performance. Ultimately, despite its higher cost compared with conventional methods (e.g., sulfuric acid treatment), the proposed oxidative desulfurization approach offers superior environmental performance an‎d, by reducing equipment corrosion an‎d eliminating acidic waste generation, can be regarded as a sustainable option for refining gas condensates.

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