In this work, the effect of ultrasound irradiation on the catalytic oxidative/adsorptive denitrogenation (COADN) of model hydrocarbon fuels (composed of pyrroleor indoleas an organonitrogen compounds dissolved in n-nonane) has been investigated using magnetic reduced graphene oxide supported with phosphomolybdic acid (PMo-Fe3O4/rGO) as a heterogeneous catalyst/adsorbent and hydrogen peroxide as an oxidant. The synthesized PMo-Fe3O4/rGO nanocomposite was characterized by XRD, FE-SEM, VSM and BET surface area analysis methods. Moreover, different experimental variables including catalyst dose, initial pyrrole/indoleconcentration, H2O2 to pyrrole/indole molar ratio, ultrasound power and sonication time have been studied on the COADN process. The regeneration/recyclability of PMo-Fe3O4/rGO catalyst was also examined. Experimental results revealed that, the ultrasound treatment significantly improved the adsorption process of organonitrogen compounds from model fuels (qe increased by 50.3% for pyrrole and 18% for indole). Furthermore, high ultrasound-aided catalytic oxidative denitrogenation efficiency (85.6% for pyrrole and 90% for indole) has been attained under optimal conditions (ultrasonic power = 200 W, sonication time = 240 min, catalyst dose = 2 g/L, and H2O2:pyrrole/indole molar ratio = 5). The recyclability of catalyst displayed that the prepared catalyst can be reused five times without any significant reduction in its performance.

中文翻译：

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使用磁性还原的基于氧化石墨烯的磷钼酸（PMo-Fe3O4 / rGO）在超声场下对模型碳氢燃料进行催化-氧化/吸附脱氮。

在这项工作中，已经研究了使用磷钼酸负载的磁性还原石墨烯氧化物（型号为碳氢化合物的吡咯烷吲哚组成的有机氮化合物，溶解在正壬烷中）对超声辐照对催化氧化/吸附脱氮（COADN）的影响。 PMo-Fe3O4 / rGO）作为非均相催化剂/吸附剂，过氧化氢作为氧化剂。通过XRD，FE-SEM，VSM和BET比表面积分析法对合成的PMo-Fe3O4 / rGO纳米复合材料进行了表征。此外，在COADN工艺上研究了不同的实验变量，包括催化剂剂量，初始吡咯/吲哚浓度，H2O2与吡咯/吲哚的摩尔比，超声功率和超声处理时间。还检查了PMo-Fe3O4 / rGO催化剂的再生/可循环性。实验结果表明，超声处理显着改善了模型燃料对有机氮化合物的吸附过程（吡咯的qe增加了50.3％，吲哚的qe增加了18％）。此外，在最佳条件（超声波功率= 200 W，超声处理时间= 240分钟，催化剂剂量= 2 g / L和H2O2）下，获得了高超声辅助的催化氧化脱氮效率（吡咯为85.6％，吲哚为90％）。 ：吡咯/吲哚摩尔比＝ 5）。催化剂的可回收性表明，所制备的催化剂可以重复使用五次，而其性能没有任何显着降低。在最佳条件下（超声波功率= 200 W，超声处理时间= 240分钟，催化剂剂量= 2 g / L，H2O2：吡咯/吲哚摩尔比= 5）已达到6％（吡咯和90％（吲哚））。催化剂的可回收性表明，所制备的催化剂可以重复使用五次，而其性能没有任何显着降低。在最佳条件下（超声波功率= 200 W，超声处理时间= 240分钟，催化剂剂量= 2 g / L，H2O2：吡咯/吲哚摩尔比= 5）已达到6％（吡咯和90％（吲哚））。催化剂的可循环利用性表明，所制备的催化剂可以重复使用五次，而其性能没有任何显着降低。