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首页> 外文期刊>RSC Advances >Designing multifunctional SO3H-based polyoxometalate catalysts for oxidative desulfurization in acid deep eutectic solvents
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Designing multifunctional SO3H-based polyoxometalate catalysts for oxidative desulfurization in acid deep eutectic solvents

机译：设计用于酸性深共熔溶剂中氧化脱硫的多功能SO 3 H基多金属氧酸盐催化剂

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Deep eutectic solvents (DESs) are ‘green’ sustainable solvents with wide applications such as extractive desulfurization of fuel; however, their low extraction efficiency is a major limitation to such applications. In this work, several SO3H-functionalized polyoxometalates were prepared and applied to oxidative desulfurization of fuels with acidic DESs as extractants and 30 wt% of H2O2 as an oxidant. Compared with neutral POM catalysts, acidic catalysts, such as [PSTEtA]3PW12O40, exhibited higher catalytic performance with 100% desulfurization efficiency. However, in the absence of DESs sulfur removal was only 9.6% with [PSTEtA]3PW12O40 used as a catalyst. To study the role of the DESs, three types of DESs were evaluated on extraction and oxidation of dibenzothiophene (DBT), with acidic DES ChCl/2Ac exhibiting the best performance. The effects of different reaction conditions, such as the amount of H2O2 and ChCl/2Ac, reaction temperature and time, different sulfur compounds, and fuel composition, were investigated. Combined with the kinetic study, results suggested that oxidation of DBT was attributed to a pseudo-first-order kinetic reaction. The activities of different sulfur compounds decreased in the order of DBT > 3-methylbenzothiophene (3-MBT) > 4-methyldibenzothiophene (4-MDBT) > 4,6-dimethyldibenzothiophene (4,6-DMDBT) > benzothiophene (BT). Compared with aromatics, the sulfur removal could be strongly affected by olefins, showing a drop of up to 66.6%.
机译：深共熔溶剂（DES）是“绿色”可持续溶剂，具有广泛的应用，例如燃料的萃取脱硫;然而，它们的低提取效率是这种应用的主要限制。在这项工作中，制备了几种SO 3 H-官能化的多金属氧酸盐，并将其用于以酸性DES为萃取剂和30 wt％的H 的燃料的氧化脱硫。 > 2 O 2 作为氧化剂。与中性POM催化剂相比，酸性催化剂，例如[PSTEtA] 3 PW 12 O < sub> 40 ，具有较高的催化性能，脱硫效率为100％。但是，在没有DES的情况下，[PSTEtA] 3 PW 12 O <的硫去除率仅为9.6％。 small> 40 用作催化剂。为了研究DES的作用，评估了三种类型的DES在二苯并噻吩（DBT）的萃取和氧化中的性能，其中酸性DES ChCl / 2Ac表现最佳。 H 2 O 2 和ChCl / 2Ac等不同反应条件的影响研究了温度和时间，不同的硫化合物以及燃料成分。结合动力学研究，结果表明DBT的氧化归因于拟一级动力学反应。不同含硫化合物的活性依次为DBT> 3-甲基苯并噻吩（3-MBT）> 4-甲基二苯并噻吩（4-MDBT）> 4,6-二甲基二苯并噻吩（4,6-DMDBT）>苯并噻吩（BT）。与芳烃相比，烯烃对脱硫的影响很大，下降幅度高达66.6％。

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