Abstract In order to meet the stringent environmental and industrial legislation on fuel specifications, sulfur compounds have to be removed efficiently from fuels. The requirement to produce ultralow-sulfur fuels (S < 10 ppm) has stimulated many works in the area of conventional hydro-desulfurization (HDS) method. Oxidative desulfurization (ODS), as an alternative or complementary technology to HDS for deep desulfurization, is conducted with high selectivity and reactivity to sterically hindered S compounds under mild reaction conditions. In the ODS process, using an appropriate oxidant in the presence of a catalyst, organic sulfur compounds can be oxidized selectively to their corresponding sulfoxides and sulfones, which can be easily removed by different separation methods. Having great catalytic characteristics, polyoxometalate materials have been utilized as a vital class of catalysts for deep desulfurization of fuels. In the past few decades, ODS of fuels using polyoxometalate as catalyst has drawn much attention, and various studies have been carried out in this area. Here, we give a critical review for the removal of sulfur compounds from liquid fuels (mostly from diesel and model fuels) by ODS via homogeneous and heterogeneous polyoxometalate catalysts.

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多金属氧酸盐作为液体燃料氧化脱硫的有效催化剂：批判性评论

摘要 为了满足严格的环境和工业法规对燃料规格的要求，必须有效去除燃料中的硫化合物。生产超低硫燃料 (S < 10 ppm) 的要求刺激了传统加氢脱硫 (HDS) 方法领域的许多工作。氧化脱硫 (ODS) 作为 HDS 深度脱硫的替代或补充技术，在温和的反应条件下对位阻 S 化合物具有高选择性和反应性。在ODS过程中，在催化剂存在下，使用合适的氧化剂，有机硫化合物可以被选择性地氧化成相应的亚砜和砜，这些亚砜和砜可以通过不同的分离方法轻松去除。具有很好的催化特性，多金属氧酸盐材料已被用作燃料深度脱硫的一类重要催化剂。在过去的几十年里，以多金属氧酸盐为催化剂的燃料消耗臭氧层物质引起了广泛的关注，并在这方面进行了各种研究。在这里，我们对 ODS 通过均相和非均相多金属氧酸盐催化剂从液体燃料（主要来自柴油和模型燃料）中去除硫化合物进行了批判性审查。