High-sulfur petroleum coke (HSPC), that is a by-product from slag oil in the coking process of refining, shows versatility values in practical applications and, however, concentrates the majority of organic sulfur. Herein, we design and construct a highly effective CTAB@HPA composites to be explored for the catalytic oxidative desulfurization of HSPC under mild conditions using hydrogen peroxide as the oxidant and 1-butyl-3-methylimidazole tetrafluoroborate ionic liquid as the extractant. The results demonstrate that the sulfur content of HSPC could be strikingly reduced from 4.46 wt% to 2.48 wt% under 60 °C and atmospheric pressure, and that the organic sulfur in HSPC is mainly oxidized to sulfoxide, sulfone and sulfate, which latter can be directly separated from petroleum coke. Moreover, the effect of reaction conditions on the desulfurization performance of HSPC as well as the catalytic oxidation reaction kinetic of HSPC desulfurization was systematically investigated. Furthermore, a mechanism for the oxidative desulfurization of HSPC over CTAB@HPA catalysts was proposed. Therefore, this work provides new insight into how to construct active catalysts for the desulfurization of HSPC under mild conditions.

高硫石油焦（HSPC）是渣油在炼焦过程中的副产品，在实际应用中显示出通用性，但是却浓缩了大部分有机硫。本文中，我们设计和构建了一种高效的CTAB @ HPA复合材料，用于在温和条件下使用过氧化氢作为氧化剂和1-丁基-3-甲基咪唑四氟硼酸酯离子液体作为萃取剂在HSPC催化氧化脱硫方面进行探索。结果表明，在60°C和大气压下，HSPC的硫含量可以从4.46 wt％显着降低到2.48 wt％，并且HSPC中的有机硫主要被氧化为亚砜，砜和硫酸盐，后者可以与石油焦直接分离。而且，系统研究了反应条件对HSPC脱硫性能的影响以及HSPC脱硫的催化氧化反应动力学。此外，提出了在CTAB @ HPA催化剂上HSPC氧化脱硫的机理。因此，这项工作为如何在温和条件下构建用于HSPC脱硫的活性催化剂提供了新的见识。