Oxidative desulfurization (ODS) was applied to three marine fuels with viscosities between 380 and 700 cSt (centistokes) and sulfur contents between 0.79 and 3.27 wt.%, using a MoO₃/Al₂O₃ catalyst. H₂O₂ was chosen as oxidizing agent with a low oxidant to sulfur ratio of 3, for economic and environmental reasons. Global sulfur removal was obtained after extraction of sulfones by dimethylformamide. Oxidation efficiency was evaluated by monitoring the conversion of alkyl-benzothiophenes and dibenzothiophene molecule by gas chromatography (GC) with a sulfur specific detector. Applying ultrasounds prior to oxidation was found to significantly enhance conversions and sulfur removal, the effect being more pronounced when initial efficiency was low, that is for more refractory molecules and heavier fuels. Ultrasound assisted ODS (UAOD) was effective on raw fuels with initial viscosity below 700 cSt. Indeed, dilution decreased the viscosity of the fuels, allowing reaction to be effective even on initially very heavy fuels. The presence of asphaltenes dissolved or precipitated in the feed did not affect the conversion of Cx-BTs and DBT significantly, with only slight variations of global sulfur removal rates. Global desulfurization rates between 60 and 80 % were obtained, clearly showing the efficiency of UAOD applied to complex matrices such as marine fuels.

使用 MoO ₃ /Al ₂ O ₃催化剂，将氧化脱硫 (ODS) 应用于粘度介于 380 至 700 cSt（厘沲）之间且硫含量介于 0.79 至 3.27 wt.% 之间的三种船用燃料。H ₂ O ₂出于经济和环境原因，选择 3 的低氧化剂硫比作为氧化剂。用二甲基甲酰胺提取砜后，获得了全面的硫去除效果。通过使用硫特异性检测器的气相色谱 (GC) 监测烷基苯并噻吩和二苯并噻吩分子的转化来评估氧化效率。发现在氧化之前应用超声波可显着提高转化率和硫去除率，当初始效率较低时，即对于更难熔的分子和更重的燃料，效果更为明显。超声辅助 ODS (UAOD) 对初始粘度低于 700 cSt 的原始燃料有效。事实上，稀释降低了燃料的粘度，使反应即使在最初很重的燃料上也能有效。原料中溶解或沉淀的沥青质的存在不会显着影响 Cx-BTs 和 DBT 的转化率，只是全球硫去除率略有变化。获得了 60% 到 80% 的全球脱硫率，清楚地表明了 UAOD 应用于复杂基质（如船用燃料）的效率。