Method for removing sulfide in simulated oil through oxidation by using transition metal tungstate as catalyst

Abstract

The invention belongs to the field of vehicle fuel desulfurization realized through catalytic oxidation and particularly relates to a method for removing a sulfide in simulated oil through oxidation by using transition metal tungstate as a catalyst. The method can be implemented according to the following steps of: (1) weighting the transition metal tungstate, adding water to dissolve the transition metal tungstate, adding sodium tungstate and stirring at room temperature; collecting a product, drying the product after the product is washed, and then, calcining the product to obtain the transition metal tungstate; (2) adding the tungstate into the simulated oil, adding an oxidizing agent and cetyltrimethylammonium bromide, cooling a reaction mixture to the room temperature, and separating out an oil phase, wherein the tungstate is synthesized in the step (1), further adding N-N-dimethyl formamide and stirring, separating out the oil phase, measuring the sulphur content and calculating the desulfurization degree; and (3) recovering a tungstate catalyst, drying and washing to remove the surface sulfide, and drying the tungstate catalyst for repeated use. The method is simple in process, low in cost and high in desulfurization degree; the transition metal tungstate is easy to recover after reaction and can be repeatedly used after regeneration.

Description

technical field

[0001] The invention belongs to the field of catalytic oxidation desulfurization of fuel for vehicles, and in particular relates to a method for oxidizing and removing sulfide in simulated oil by using transition metal tungstate as a catalyst. Background technique

[0002] With the rapid development of the automobile industry, the pollution of sulfur compounds produced by the combustion of vehicle fuels is becoming more and more serious. Countries and regions around the world have successively formulated strict standards for the sulfur content of gasoline and diesel [1]. In industry, hydrodesulfurization (HDS) is usually used to remove sulfide in gasoline and diesel, but for thiophene and its derivatives, due to the steric hindrance effect, the desulfurization effect is poor. In order to achieve the purpose of deep desulfurization, the reaction conditions must be changed. and catalysts put forward higher requirements, which in turn leads to an increase in the...

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