Ultrasonic-assisted ozone oxidation desulfurization method

Abstract

The invention discloses an ultrasonic-assisted ozone oxidation desulfurization method. According to the method, ozone is used as an oxidizer, a solid powdery substance is used as a catalyst, acetonitrile is used as an extractant, and ultrasonic waves are used for assisting catalytic oxidation. The method comprises the following steps: under normal pressure conditions, mixing an oil product to be treated with acetonitrile in a volume ratio of 1:(1-3), controlling the reaction temperature at 20-65 DEG C, adding the catalyst solid powdery substance, introducing ozone, and reacting under the ultrasonic action for 50-60 minutes; and after the reaction finishes, stopping the ultrasonic waves, and cooling to room temperature to naturally stratify the reaction mixture, wherein the separated supernatant oil phase is the desulfurized oil product. The ultrasonic-assisted catalytic ozone oxidation desulfurization can be implemented under the conditions of normal temperature and normal pressure, and has the advantages of high desulfurization efficiency and short reaction time. Compared with the traditional technique, the invention has the advantages of low production cost, strong desulfurization capacity, short reaction time, high desulfurization efficiency, low operating cost and the like, and can easily implement industrial production.

Description

technical field

[0001] The invention relates to a method for ultrasonic-assisted ozone oxidation desulfurization, which belongs to the technical field of oxidation desulfurization. Background technique

[0002] SO produced after combustion of sulfur compounds in fuel oil X , is not only an important precursor for acid deposition, but also SO x It is also an inhibitor of motor vehicle exhaust conversion catalysts, which will reduce the NO x , conversion efficiency of incompletely combusted hydrocarbons (HC) and particulate matter (PM). As the sulfur content required by environmental regulations becomes lower and lower, while crude oil becomes heavier and higher in sulfur content, this brings many challenges to the ultra-deep desulfurization of gasoline and diesel, especially diesel. challenge. Therefore, the development of new, efficient, and ultra-deep desulfurization methods has become the focus of research at home and abroad.

[0003] Traditional fuel oil hydrodesulfu...