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Method for removing sulfide in fuel oil through catalytic oxidation

A catalytic oxidation and fuel oil technology, applied in the field of fuel oil desulfurization, can solve the problems of affecting the desulfurization rate and yield of oil products, easy loss, short service life, etc., and achieve the effect of increasing stability, improving activity and improving desulfurization rate

Inactive Publication Date: 2016-01-06
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalytic oxidation desulfurization process of fuel oil is generally divided into two steps, that is, thiophene compounds in the oil are first oxidized into more polar sulfone compounds, and then the sulfone compounds are extracted by a suitable extractant to achieve the desulfurization of fuel oil. Purpose, but the two-step process affects the desulfurization rate and yield of oil
[0005] Currently, single carrier SO 4 2- / M x o y Type solid superacid, there is also active component SO in the process of use 4 2- Easy to lose, short service life and other disadvantages; in the process of catalytic oxidation desulfurization, choose H 2 o 2 As an oxidizing agent, it has the advantages of simple operation and mild conditions, but H 2 o 2 The oxidation performance needs to be further improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Dibenzothiophene (DBT) was dissolved in n-octane to prepare a simulated oil with a sulfur content of 1000ppm. Take 20.0mL of the simulated oil, 0.015gSO 4 2- / ZrO 2 -Cr 2 o 3 Catalyst, 20.0mL extractant DMF, added to the reactor with condensing reflux device, after the temperature of the above mixture rises to 70 °C, add H 2 o 2 Aqueous solution (30% by mass) 0.80mL, mechanically stirred at 70°C for 80min. After the reaction, cool to room temperature, filter and separate the catalyst, transfer the filtrate to a separatory funnel and let it stand. After 10 minutes, the liquid is divided into two layers and a clear phase interface appears. The upper layer is the oil phase, and the lower layer is the DMF phase. The separated catalyst And DMF extractant treatment and recycling. After the upper oil phase was dried with anhydrous sodium sulfate, an appropriate amount was taken to make a solution to be tested. After gas chromatography analysis, the removal rate of sulfu...

Embodiment 2

[0023] The operation process is similar to Example 1, only the amount of catalyst used in Example 1 is changed, and other conditions are unchanged, and the amount of catalyst used is investigated. When the amount of catalyst is 0.005g, 0.010g, 0.020g, the removal rate of sulfur in simulated oil is 77.4%, 89.6%, 98.6%, respectively.

Embodiment 3

[0025] The operation process is similar to Example 1, only the amount of oxidant used in Example 1 is changed, and other conditions remain unchanged, and the amount of oxidant used is investigated. h 2 o 2 When the amount of aqueous solution is 0.25, 0.50, 1.0mL, the removal rate of sulfur in simulated oil is 75.8%, 93.6%, 98.6%, respectively.

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Abstract

The invention provides a method for removing sulfide in fuel oil through catalytic oxidation and belongs to the technical field of desulfurization of fuel oil. Fuel oil, SO42- / ZrO2-Cr2O3 and DMF are mixed in a reaction vessel provided with a condensation reflux device and are heated up to reach oxidation temperature, and then a H2O2 water solution is added to perform catalytic oxidation reaction; cooling is performed to reach the room temperature after reaction is finished, filtrate obtained after filtration stands, and supernatant is desulfurized fuel oil. The SO42- / ZrO2-Cr2O3 catalyzes H2O2 to oxidize thiophene sulfide in the fuel oil into a sulfone compound, the sulfone compound generated through oxidization is extracted through DMF, and accordingly the thiophene sulfide in the fuel oil is removed. The method is simple in operating process and good in desulfuration effect and can be used for deep desulfurization of fuel oil.

Description

technical field [0001] The invention belongs to the technical field of fuel oil desulfurization, and in particular relates to a method for catalytically oxidizing and removing sulfides in fuel oil. Background technique [0002] With the rapid development of the world economy, the demand for fuel oil is increasing day by day. While the extensive use of fuel oil brings convenience to human beings, the sulfur oxides produced during use also bring a huge burden to the global ecological environment. . In response to this phenomenon, major countries and regions in the world have promulgated increasingly stringent oil sulfur standards, and it is imperative to develop new and efficient oil desulfurization technologies. [0003] Among the sulfides contained in fuel oil, thiophene compounds account for a large proportion, especially in catalytic cracking gasoline, thiophene sulfides account for more than 70% of the total sulfur content. Thiophene sulfides have a high boiling point, ...

Claims

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Application Information

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IPC IPC(8): C10G27/12
Inventor 张存赵永庚姚日远孔黎明
Owner YANGZHOU UNIV
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