共查询到20条相似文献,搜索用时 31 毫秒
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Z. Ismagilov S. Yashnik M. Kerzhentsev V. Parmon A. Bourane F. M. Al-Shahrani 《Catalysis Reviews》2013,55(3):199-255
New requirements for very low sulfur content (10 ppm) in liquid motor fuels demand novel approaches for ultra-deep desulfurization. For production of near-zero-sulfur diesel and low-sulfur fuel oil, removal of refractory sulfur compounds, like 4,6-dimethyldibenzothiophene and other alkyl-substituted thiophene derivatives, is necessary. Elimination of these compounds by hydrodesulfurization (HDS) requires high hydrogen consumption, high pressure equipment, and new catalysts. Various oxidative desulfurization processes, including recent advances in this field for diesel fuels, and the drawbacks of this technology in comparison with HDS are examined and discussed. It is shown that the oxidation of sulfur compounds to sulfones with hydrogen peroxide allows for production of diesel fuels with a sulfur content of 10 ppmw or lower at atmospheric pressure and room temperature. The gas phase oxidative desulfurization of sulfur compounds with air or oxygen is feasible at atmospheric pressure and higher temperatures: 90–300 °С and offers better economic solutions and incentives. 相似文献
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多酸材料具备独特的酸性和氧化还原性能,在油品氧化脱硫领域得到广泛关注。本文综述了多酸材料在油品催化氧化脱硫领域的研究进展,详细叙述了多酸离子液体催化剂和以金属有机框架、氧化物、碳材料等为载体的负载型多酸催化剂的特点及其催化氧化燃油中多种有机硫化物的脱硫效果。将多酸与离子液体或其他载体结合后不仅能有效增强多酸的催化活性,而且可提高催化剂的热稳定性与重复利用性。本文对各类载体的特点及发展前景进行了详细比较,并对其研究现状进行了梳理。最后对多酸材料在氧化脱硫领域的发展方向提出了展望,指出了具有良好催化活性、循环性能及经济适用性强的多酸材料是未来的研究方向。 相似文献
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由于操作条件温和、成本相对较低、脱硫率高以及绿色环保等优点,氧化脱硫被认为是非加氢脱硫技术中降低燃料油中高硫含量的主要技术之一。本文综述了近些年来国内外关于燃料油氧化脱硫机理的研究进展,详细叙述了使用不同氧化剂(H2O2、油溶性氧化剂、空气、氧气以及固体氧化剂)催化氧化脱硫机理和离子液体中的氧化脱硫机理,简要介绍了低共熔溶剂中的氧化脱硫机理、超声辅助氧化脱硫机理、光催化氧化脱硫机理以及电化学氧化脱硫机理,并对氧化脱硫机理的研究方向提出了见解。加深对氧化脱硫机理的研究将有利于寻求合适的催化剂和反应条件,为更好地指导燃料油以及其他油品深度脱硫的进行提供理论基础,对实际生产也具有重要的理论指导意义。 相似文献
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轻质油品氧化脱硫技术进展 总被引:9,自引:1,他引:9
介绍了国内外轻质油品氧化脱硫技术的研究进展情况,分析了选择性氧化脱硫、超声波氧化脱硫、光催化氧化脱硫、等离子体液相氧化脱硫等技术的优缺点,展望了氧化脱硫技术应用前景。 相似文献
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Akopyan A. V. Domashkin A. A. Polikarpova P. D. Tarakanova A. V. Anisimov A. V. Karakhanov E. A. 《Theoretical Foundations of Chemical Engineering》2018,52(5):894-897
The possibility of using a catalyst system based on hydrogen peroxide and formic acid for the oxidative desulfurization of nonhydrotreated vacuum gas oil has been explored. Conditions for the effective extraction of oxidized sulfur compounds from nonhydrotreated vacuum gas oil have been selected. The effect of oxidation and thermolysis conditions on the oxidative desulfurization process has been studied, and a 44% decrease in the total sulfur content in nonhydrotreated vacuum gas oil has been achieved.
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A desulfurization process for model oil and real oil was investigated based on the chemical oxidation of mixed sulfur containing compounds in the presence of nitrogen compounds (indole and quinoline) using hydrogen peroxide as oxidizing agent and dodecamolibdophosphoric acid (H3PMo12O40) encapsulated in a kind of metal-organic framework (HKUST-1) as PMo@HKUST-1. The effect of isopropanol, ethanol and acetonitrile as extractive solvent and 1-ring (toluene, xylene and mesitylene) and 2-ring (naphthalene) aromatic hydrocarbons in desulfurization of model oil was studied. The desulfurization of sulfur-containing compounds was accelerated in the presence of aromatic hydrocarbons. In fact, a higher desulfurization efficiency of the heterogeneous catalyst could be achieved with system containing a polar solvent in contact with an aromatic hydrocarbon. Quinoline had no effect on oxidative desulfurization (ODS) reaction, whereas indole had a slightly negative effect. Presence of aromatic compounds had slightly positive effect on ODS reaction. 相似文献
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论述了氧化法脱除汽油和柴油中有机硫技术进展。介绍了过氧化物氧化脱硫、臭氧氧化脱硫、氧气氧化脱硫、超声波氧化脱硫、生物氧化脱硫、电催化氧化脱硫和光化学氧化脱硫等,分析了不同方法的优势及应用现状。今后氧化脱硫技术研究的重要方向是进一步研究脱硫机理、提高脱硫率和降低成本。 相似文献
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深共融溶剂(deep eutectic solvents,DESs)萃取脱硫技术具有操作简易、条件温和、成本低、脱硫效果好等优点,为燃油中有机硫化物的绿色深度脱除开辟了一条新的途径。本文综述了近5年DESs在燃油脱除有机硫化物中的最新研究成果,主要从直接萃取脱硫和氧化/萃取脱硫两方面对DESs脱硫进行综述。首先对不同DESs的脱硫效果进行了归纳总结,如以四丁基溴化铵/聚乙二醇直接萃取脱硫,3次萃取后,二苯并噻吩的脱除率可达100%;以氯化胆碱/乙酸为萃取剂氧化萃取脱硫,对二苯并噻吩模拟油的氧化萃取脱硫率也可达100%,可满足超低硫要求。同时对影响DESs脱硫效果的因素,如DESs的结构、脱硫的温度、时间、剂油比、硫化物的种类及浓度、氧化剂等进行了分析。然后对DESs的回收方法进行了总结,指出了回收过程中面临的问题并讨论了不同DESs的萃取脱硫机理。最后指出DESs脱硫面临的问题并展望了DESs在燃油脱硫中未来的发展前景。 相似文献
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Rakhmanov E. V. Akopyan A. V. Tarakanova A. V. Lesin S. V. Vinokurov V. A. Glotov A. P. Movsesyan A. K. Anisimov A. V. 《Theoretical Foundations of Chemical Engineering》2017,51(5):830-834
Theoretical Foundations of Chemical Engineering - The oxidative desulfurization of material containing oil sludge using hydrogen peroxide and transition metal compounds followed by subjecting the... 相似文献
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Kairbekov Zh. K. Myltykbaeva Zh. K. Muktaly D. Nysanova B. Anisimov A. V. Akopyan A. V. 《Theoretical Foundations of Chemical Engineering》2018,52(4):677-680
Theoretical Foundations of Chemical Engineering - The catalytic activity of transition metal compounds (Mo, V, and W) in the reaction of oxidative desulfurization of straight-run diesel fuel with... 相似文献
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Extractive oxidation, wherein aromatic sulfur-containing compounds are extracted and subsequently oxidized to their corresponding sulfones, has proven to be one of the most effective desulfurization methods for producing ultra-low sulfur content fuels. As non-volatile and highly designable solvents, ionic liquids (ILs) have attracted considerable attention for the oxidative desulfurization of fuels. In this review, we systematically discuss the utility of ILs in catalytic and extractive oxidation, including their role as extractant, catalyst, or both. We also discuss the challenges facing the use of ILs in this regard, including their relatively high cost and excessive viscosity, as well as their efficiency and stability as catalyst. 相似文献
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过氧化氢用于油品氧化脱硫的研究进展 总被引:3,自引:0,他引:3
氧化脱硫技术是一种很有发展前途的脱硫技术,过氧化氢是油品氧化脱硫技术中研究最普遍的氧化剂。综述了近年来国内外以过氧化氢为氧化剂的燃料油氧化脱硫技术的研究进展,介绍了在不同的催化剂如有机酸、杂多酸、分子筛、离子液体等作用下过氧化氢氧化脱硫的效果及其机理,同时对其应用前景进行了展望。 相似文献