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Ultrasonic-assisted ozone oxidation desulfurization method

An Ultrasound Assisted Ozone Oxidation Technology

Inactive Publication Date: 2012-10-03
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But H 2 o 2 The price is high, the stability is poor, and it is a water-soluble oxidant, and the contact effect with the fuel is not very good. In order to achieve a good desulfurization effect, a large amount of oxidant is needed, which increases the cost of the oxidation desulfurization technology; A large amount of water is easy to emulsify the oil again, which affects the yield of the oil; in addition, the selective oxidation activity of the catalyst is not high enough, and the oxidative desulfurization also affects the properties of the oil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: Simulated system of dibenzothiophene (DBT)-n-octane

[0019] Taking dibenzothiophene (DBT), which is difficult to remove in hydrodesulfurization, as a representative, a certain amount of DBT was dissolved in 60ml of n-octane to prepare a simulated system with a sulfur content of 500ppm, and 180ml of acetonitrile was added, with a frequency of 40kHz Sonicate and heat to 35 °C. Then add zinc phosphomolybdate catalyst according to 2.5% n-octane quality, pass through the ozone that output is 0.013g / min, after reacting 60min under ultrasonic action, the content of DBT in n-octane is 0, and the removal rate of DBT reaches 100 %.

Embodiment 2

[0020] Example 2: Simulation system of dibenzothiophene (DBT)-n-octane

[0021] Taking dibenzothiophene (DBT), which is difficult to remove in hydrodesulfurization, as a representative, a certain amount of DBT was dissolved in 60ml of n-octane to prepare a simulated system with a sulfur content of 500ppm, and 120ml of acetonitrile was added, with a frequency of 40kHz Sonicate and heat to 35 °C. Then add zinc phosphomolybdate catalyst according to 2.5% n-octane quality, pass through the ozone that output is 0.013g / min, after reacting 60min under ultrasonic action, the content of DBT in n-octane is 0, and the removal rate of DBT reaches 100 %.

Embodiment 3

[0022] Example 3: Simulated system of dibenzothiophene (DBT)-n-octane

[0023] Taking dibenzothiophene (DBT), which is difficult to remove in hydrodesulfurization, as a representative, a certain amount of DBT was dissolved in 60ml of n-octane to prepare a simulated system with a sulfur content of 300ppm, and 60ml of acetonitrile was added. Sonicate at 40 kHz and heat to 35 °C. Then add the zinc phosphomolybdate catalyst by 2.5% n-octane quality, pass into the ozone that output is 0.013g / min, after the reaction 50min under the ultrasonic action of frequency is 40kHz, the content of DBT in the n-octane is 0, the content of DBT The removal rate reaches 100%.

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G27/14C10G21/20
Inventor 王睿赵燕
Owner SHANDONG UNIV
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