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Photo-catalytic oxidation desulfurization method and catalyst for diesel or gasoline

A desulfurization catalyst, photocatalytic oxidation technology, applied in physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, chemical instruments and methods, etc. The problems of high hole-electron pair recombination rate and low photocatalytic efficiency of photocatalyst can achieve the effect of improving photocatalytic oxidation desulfurization performance, low operating cost, and environmental friendly operating cost.

Inactive Publication Date: 2015-02-18
OCEAN UNIV OF CHINA +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] Photocatalytic oxidation is a redox system in which the catalyst generates photogenerated holes-electrons under the excitation of light. However, the recombination rate of hole-electron pairs is high and the quantum usage rate is low, which leads to low catalytic efficiency of photocatalysts. It is necessary to reduce the photogenerated holes. hole-electron recombination probability
At the same time, most of the existing photocatalysts cannot be recycled in practical applications, which limits their industrialization.

Method used

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  • Photo-catalytic oxidation desulfurization method and catalyst for diesel or gasoline
  • Photo-catalytic oxidation desulfurization method and catalyst for diesel or gasoline
  • Photo-catalytic oxidation desulfurization method and catalyst for diesel or gasoline

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Experimental program
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Effect test

Embodiment 1-5

[0024] Embodiment 1-5: Preparation method of diesel or gasoline photocatalytic oxidation desulfurization catalyst

[0025] Wash the finished macroporous polystyrene resin D001-cc with ethanol and deionized water several times to remove impurities. After immersing in 0.1 mol / L sulfuric acid solution for 24 h, it was washed with deionized water until the pH value of the solution remained constant, and dried in a drying oven at 60 °C to constant weight.

[0026] Immerse a 100 mL two-necked glass reaction bottle equipped with mechanical stirring in an ice-salt bath at -25 °C, add 100 mL of 1,1,2-trifluorotrichloroethane (F113) under slow stirring, and then add 8.0 mL of 25 wt% NaOH aqueous solution and 1 mL of 30 wt% H 2 o 2 , after stirring for 5 min, 4.6496 g of heptafluorobutyryl chloride was added quickly, the reaction was carried out for 2 min, the stirring was stopped to allow the reaction mixture to separate completely, and the lower oil layer was collected and washed w...

Embodiment 6-10

[0030] Diesel / gasoline photocatalytic oxidation desulfurization experiment, the experimental conditions are: diesel oil 10 mL, catalyst dosage is 1.0% of diesel mass, reaction temperature is 80 ℃, phosphotungstic acid loading is 10 wt%, oxygen flow rate is 150 mL / min , 125 w ultraviolet light source, 90% NMP aqueous solution as the extraction agent, and the ratio of agent to oil is 1:1, change the reaction time, and investigate the influence of the reaction time on the desulfurization rate when the reaction time is 1h, 1.5h, 2h, 2.5h, and 3h respectively. The experimental results are shown in Table 1.

[0031] Table 1 Effect of reaction time on desulfurization effect

[0032] Reaction time / h 1 1.5 2 2.5 3 Desulfurization rate / % 43.53 44.27 52.10 54.52 55.72

[0033] It can be seen that the desulfurization rate gradually increases with the prolongation of the reaction time, and a sudden change occurs after 1.5 h, and the desulfuriz...

Embodiment 11-14

[0035] Diesel / gasoline photocatalytic oxidation desulfurization experiment, the experimental conditions are: diesel oil 10 mL, the catalyst dosage is 1 wt% of the diesel mass, the reaction time is 2 h, the loading of phosphotungstic acid is 10 wt%, and the oxygen flow rate is 150 mL / min , 125 w ultraviolet light source, 90% NMP aqueous solution as the extraction agent, and the ratio of agent to oil is 1:1, the reaction temperature is changed, and the influence of the reaction temperature on the desulfurization rate of 30°C, 50°C, 70°C, and 90°C is investigated. The experiment The results are shown in Table 2.

[0036] Table 2 Effect of reaction temperature on desulfurization effect

[0037] Reaction temperature / ℃ 30 50 70 90 Desulfurization rate / % 42.63 44.56 51.39 61.52

[0038] It can be seen that when the reaction temperature is lower than 90 ℃, the desulfurization rate increases gradually with the increase of the reaction temperature, a...

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Abstract

The invention discloses a photo-catalytic oxidation desulfurization catalyst for diesel or gasoline. The photo-catalytic oxidation desulfurization catalyst is characterized by being prepared by the step that macroporous polystyrene series resin is subjected to fluorine-modification and loaded with phosphotungstic acid. The desulfurization method adopting the catalyst comprises the steps as follows: sulfur-containing diesel or gasoline is taken as the raw material and has a photo-catalytic oxidation desulfurization reaction with existence of an oxidizing agent, the catalyst and an ultraviolet light source, and a material after reaction is separated and then extracted by an extraction agent to obtain product diesel or gasoline. According to the photo-catalytic oxidation desulfurization catalyst for diesel or gasoline, oxygen replaces H2O2 and is used as the oxidizing agent, so that the defects of higher price, poor stability, generation of large quantity of waste water in a desulfurization process and the like of H2O2 are overcome, by means of application of the photocatalytic technology, the reaction condition is mild, the operation cost is low, and environmental friendliness is realized. Fluoride is grafted to the polystyrene resin, and the high temperature aging resistance and photo-catalytic oxidation desulfurization performance of the catalyst are improved by means of the high bond energy of a fluorocarbon bond as well as powerful electronegativity and photoelectricity of fluorine atoms.

Description

technical field [0001] The invention relates to a method for photocatalytic oxidation desulfurization of diesel oil or gasoline and the catalyst used therefor, in particular to a fluorine-modified polystyrene resin / phosphotungstic acid composite solid catalyst, its preparation method and its application in diesel oil / gasoline photocatalysis Oxidative desulfurization method. Background technique [0002] Air pollution and smog in my country's cities are very serious. One of the main reasons is that sulfur-containing fuel inevitably emits SO into the air during the combustion process. 2 and other sulfur-containing compounds, as well as the long-term energy structure and immature desulfurization technology have caused the pollution of this environment, which seriously threatens the living environment of human beings and the sustainable development of society. According to reports, the annual SO emissions into the atmosphere due to the combustion of vehicle fuel 2 It has becom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G27/04B01J31/06
CPCB01J31/06B01J2231/70B01J2523/51B01J2523/69B01J2523/70C10G27/10C10G2300/104C10G2300/1044C10G2300/1055C10G2300/1059C10G2300/202
Inventor 李春虎孙晓娟任卫平袁国峰王亮冯丽娟卞俊杰
Owner OCEAN UNIV OF CHINA
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