Preparation Of Heteropoly Acids Containing Ionic Liquid Immobilized On Magnetically Catalyst For Oxidative Desulfurization

In recent years, the development of the world economy led to the growing demand for petrol and diesel, the sulfur dioxide from car exhaust are hazardous to human health and have a serious impact on the environment. Therefore, the fuel sulfur fuel desulfurization technology has caused wide public concern all over the world. Conventional hydrodesulfurization technology requires large investment, high energy consume, severe operation condition and low acticity to some special compounds such as species of thiophenes. Therefore, developing a catalyst system of efficient, stabilization and dispersion is very important.Due to the regular pour structure, high surface area, good dispersion and super-paramagnetic behavior, magnetic materials has been widely used in catalytic field. Magnetic materials have widespread uses as catalyst supports, which can effective disperse the active ingredient and improve the quality of the catalyst. It is worth noting that the Magnetite mesoporous materials supported heteropoly acid is receiving more and more attention. The innovation of this paper mainly divided into the following two parts:(1) Phosphotungstic acid containing ionic liquid l-methyl-3-[(triethoxysilyl) propyl] imidazolium chloride (IL) immobilized on magnetic mesoporous silica rod catalyst was successfully prepared and successfully applied for the oxidation of dibenzothiophene. The catalyst was characterized with different technologies. The effects of reaction time and reaction temperature on the conversion of DBT were studied. At313K, the conversion was over99%at the reaction time was6h. It was demonstrated that the catalyst was extremely effective for the reaction and the catalyst could be easily separated from the reaction solution by applying an external magnetic field and recycled several times.(2) Magnetically functionalized TiO2has been successfully synthesized using Fe3O4nanoparticles with tetrabutyl titanate as a titanium source. y-Fe2O3@TiO2supported two hybrid materials ([Bmim]3PMo12O40,[NH2p-mim]3PMo12O40) were synthesized. shows a high catalytic activity in the oxidation of dibenzothiophene (DBT) with H2O2aqueous solution as the oxidant than [Bmim]3PMol2O40/y-Fe2O3@TiO2owing to the fact that amino-containing hybrid material has positive effects on the oxidative desulfurization. It was demonstrated that the99.9%DBT conversion was achieved using [NH2p-mim]3PMo12O40/γ-Fe2O3@TiO2and the catalyst could be easily separated from the reaction solution by applying an external magnetic field and reused without deactivation after five runs.