Harvesting clean energy from fuel feedstocks is of paramount significance in the field of environmental science. In this dynamic area, desulfurization provides a valuable contribution by eliminating sulfur compounds from fuel feedstocks to ensure the utilization of fuels without the emission of toxic sulfur oxides (SOx gases). Nonetheless, the inadequacy of the current industrial technique (hydrodesulfurization, HDS) in the removal of refractory sulfur (RS) compounds and the stringent rules imposed on the fuel sulfur level have kindled research on other desulfurization methods like oxidative desulfurization (ODS). With the capacity of eliminating RS compounds under mild conditions, ODS is endorsed as a suitable replacement or complementary to HDS. ODS, in general, consists of two steps: (i) oxidation and (ii) extraction. The oxidation of sulfur compounds is carried out using a suitable catalyst (hereafter termed as an ODS catalyst) in the presence of an oxidant. Choosing a suitable ODS catalyst for industrial applications is still a quest among the various types of catalysts reported so far. With this outline, herein, all the types of ODS catalysts along with their synthetic methods, reactivity and mechanistic insights are reviewed. The activity of ODS catalysts could be influenced by factors like the type of RS compound, solvent, fuel, etc. and those factors are reviewed. The effects of ionic liquids, light, and ultrasound on the performance of ODS catalysts are also briefly summarized. The opportunities and challenges for ODS catalysts are comprehensively explicated in the end. Through this review, systematic information about the types of ODS catalysts including the basic definition, preparative methods, reactivity and mechanism can be comprehended. Furthermore, this review reveals the merits and demerits related to highlighting catalytic ODS as a replacement or complementary to HDS.

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A comprehensive review on oxidative desulfurization catalysts targeting clean energy and environment

Molybdenum Dioxide Nanoparticles Anchored on Nitrogen-Doped Carbon Nanotubes as Oxidative Desulfurization Catalysts: Role of Electron Transfer in Activity and Reusability

Alumina-carbon nanofiber composite as a support for MoCo catalysts in hydrodesulfurization reactions

The development of highly active oxidative desulfurization (ODS) catalysts is of practical importance for producing clean fuel oil. Recently, metal–organic frameworks (MOFs) have been attempted as ...

Synthesis of Defect-Rich Titanium Terephthalate with the Assistance of Acetic Acid for Room-Temperature Oxidative Desulfurization of Fuel Oil

Catalytic benzene oxidation by biogenic Pd nanoparticles over 3D-ordered mesoporous CeO2

Oxidative desulfurization of dibenzothiophene using molybdenum catalyst supported on Ti-pillared montmorillonite and separation of sulfones by filtration

The invention discloses a method for degrading atrazine in a water body through activating peroxymonosulfate by using potassium ferrate. The invention relates to the water treatment method and solvesthe problem of low activation efficiency of single peroxymonosulfate. The method comprises the following steps that a ferrate and a peroxymonosulfate are added in a polluted water body, sulfate free radicals and hydroxyl free radicals with a strong oxidizing property are generated with the utilization of mutual interaction of the ferrate and the peroxymonosulfate, and refractory organic pollutantsof organic wastewater are further oxidized, so that the purpose of degrading organic pollutants is achieved. The method provided by the invention has efficient and quick operation and simple operation at normal temperature; the leaching rate of iron ions in a using process is very low; secondary pollution is reduced; and the method is adapted to extensive pH conditions, and has a wide applicationprospect in the purification of organic polluted water bodies.

Method for degrading atrazine in water body through activating peroxymonosulfate by using potassium ferrate

The invention discloses a continuous extraction method of cadmium ions in soil, which belongs to the field of soil heavy metal pollution monitoring and evaluation. The method comprises the following steps: (1) determining a pH value of a soil sample; (2) extracting in different-concentration CH3COOH reaction tanks according to the soil pH value determined in the first step; (3) extracting soil residue left in the extraction of the previous step by utilizing a CH3COONa reaction tank to obtain heavy metal extracted in the second step; (4) extracting the soil residue left in the extraction of theprevious step by utilizing a CaCl2 reaction tank to obtain heavy metals extracted in the third step; and (5) dissolving the soil residue left in the extraction of the previous step by adopting HNO3,HF and HClO4 to obtain final extracted heavy metal. The method disclosed by the invention is to optimize the traditional soil heavy metal continuous extraction method, so that the problem that the extraction amount of the heavy metal in one form is slightly high or slightly low can be avoided, the measured data is good in stability, the requirement for evaluating the soil form can be met, and themethod can be used as an index for evaluating the migration and harm of the soil heavy metal.

Continuous extraction method of cadmium ions in soil

The invention relates to a method for removing DBT (dibenzothiophene) from an oil product by adopting a Co/KIT-6 cubic mesoporous catalyst The method comprises steps as follows: a certain amount of P123, HCl and deionized water are weighed in sequence and stirred at the temperature of 35 DEG C, n-butyl alcohol is added, stirring is performed for 1 h at the temperature of 35 DEG C, then TEOS (tetraethoxysilane) is added, a mole ratio of P123, H2O, HCl, n-butyl alcohol and TEOS is 0017:19649:531:131:1, and a mixture stirred for 24 h and then subjected to hydro-thermal treatment for 24 h at the temperature of 35 DEG C; obtained white crystals are subjected to suction filtration, washed and roasted at the temperature of 550 DEG C, and KIT-6 is obtained; the Co/KIT-6 catalyst is prepared with an impregnation method; the synthesized Co/KIT-6 catalyst and an oxidizing agent cyclohexanone peroxide are added to an n-octane solution containing a certain amount of DBT and quinolone, and a mixed solution obtained after a reaction is extracted twice in sequence with DMF (N,N-dimethylformamide) The catalyst prepared with the method can have remarkable catalyzing effect on both DBT and quinolone in an n-octane system, besides, a preparation technology of the catalyst is simple, and reuse ratio is high

Preparation of Co-based cubic mesoporous catalyst and application of Co-based cubic mesoporous catalyst in catalytic oxidative desulfurization and denitrification

The invention relates to a method for removing dibenzothiophene from an oil product through utilization of a Co/KIT-6 cubic mesoporous catalyst. The method comprises: weighing a certain amount of P123, concentrated hydrochloric acid and deionized water in sequence, performing stirring at 35 DEG C, adding n-butanol, maintaining the temperature at 35 DEG C while performing stirring for 1h, adding tetraethoxysilane (TEOS), wherein the mole ratio of P123 to H2O to HCl to n-butanol to TEOS is 0.017:196.49:5.31:1.31:1, performing stirring for 24 h, and performing thermal treatment at 35 DEG C for 24 h; performing pumping filtration to the obtained white crystal, washing the obtained product, and performing calcination at 550 DEG C to obtain KIT-6; adopting an impregnation method to prepare a Co/KIT-6 catalyst; and adding a certain amount of the prepared Co/KIT-6 catalyst and cyclohexanone peroxide taken as an oxidant to a certain amount of a n-octane solution containing dibenzothiophene (DBT) to perform catalytic oxidation to dibenzothiophene, and performing extraction with N,N-dimethylformamide (DMF) for two times in sequence after the reaction, thereby removing dibenzothiophene from an oil product. The method is simple to operate, high in removal efficiency and mild in condition, the preparation technology of the catalyst is simple, and the catalyst is high in reuse rate.

Method for removing dibenzothiophene from oil product through utilization of Co/KIT-6 cubic mesoporous catalyst

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