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Performances, kinetics and mechanisms of catalytic oxidative desulfurization from oils

机译：油脂催化氧化脱硫的性能，动力学和机理

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摘要

Ultra-deep desulfurization technologies are critical for cleaner oils and consequent better air quality. Earlier efforts in this field focused on specific catalysts and their catalytic efficiencies, while current interest has shifted to the differences between homogenous and heterogeneous catalysis systems applied in catalytic oxidation desulfurization (ODS) as well as their advantages and disadvantages. In this review, catalysts using various supports were described and their catalytic activities in total oxidation of sulfur compounds were evaluated and commented meanwhile, taking hydroperoxide as oxidant. Then, the effects of reaction parameters on catalyst activities and the kinetics and mechanisms that were used for ODS from oils were reviewed. Under the same conditions, heterogeneous catalysts performed better than homogeneous catalysts. Leaching of active components, existence of N-containing compounds and excessive reaction temperature would deactivate catalysts in ODS. Besides, power-law kinetics equations, Langmuir-Hinshelwood mechanism, and "nucleophilic attack" reaction mechanism" will provide in-depth analysis of desulfurization process and catalysts deactivation. Future research needs on ODS are proposed including the development of novel carrier materials, the optimization of acid sites distribution and the better understanding of deep reaction mechanisms.
机译：超深脱硫技术对清洁油至关重要，因此更好的空气质量。该领域的早期努力集中在特定催化剂及其催化效率上，而流动的感兴趣已经转变为催化氧化脱硫（ODS）中均匀和异质催化体系之间的差异以及它们的优缺点。在该综述中，描述了使用各种载体的催化剂，并评估其总氧化硫化合物的催化活性，同时评论氢过氧化氢作为氧化剂。然后，综述了反应参数对催化剂活性的影响和用于来自油的ODS的动力学和机制。在相同的条件下，非均相催化剂比均质催化剂更好。活性成分的浸出，存在N含N的化合物和过量反应温度将使ODS中的催化剂失活。此外，幂律动力学方程，Langmuir-Hinshelwood机制和“亲核攻击”反应机制“将对脱硫过程和催化剂失活进行深入分析。提出了未来的ODS研究需求，包括开发新型载体材料，包括开发优化酸部位分布及对深反应机制的更好理解。

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  • 来源
    《RSC Advances》 |2016年第105期|共17页
  • 作者

    Wei Sainan; He Huijun; Cheng Yan; Yang Chunping; Zeng Guangming; Qiu Lu;

  • 作者单位

    Hunan Univ Coll Environm Sci &

    Engn Changsha 410082 Hunan Peoples R China;

    Hunan Univ Coll Environm Sci &

    Engn Changsha 410082 Hunan Peoples R China;

    Guilin Univ Technol Coll Environm Sci &

    Engn Guilin 541006 Guangxi Peoples R China;

    Hunan Univ Coll Environm Sci &

    Engn Changsha 410082 Hunan Peoples R China;

    Hunan Univ Coll Environm Sci &

    Engn Changsha 410082 Hunan Peoples R China;

    Hunan Univ Coll Environm Sci &

    Engn Changsha 410082 Hunan Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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