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Method for removing thiophene sulfur in fuel oil by using Ag2O/SiO2 composite aerogel as adsorbent

A composite airgel and adsorbent technology, applied in the direction of solid adsorbent liquid separation, separation methods, chemical instruments and methods, etc., can solve the problems of reduced adsorption desulfurization performance, difficult industrial production, easy clogging, etc., and achieves convenient operation, The effect of mild adsorption conditions and low requirements for adsorption equipment

Active Publication Date: 2016-11-16
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during the preparation process, metal ions are easy to block the pores of metal oxides, resulting in the accumulation of loaded active components on the surface, which cannot enter the pores to provide active sites, reducing the adsorption and desulfurization performance, and this method is difficult to apply to industrial production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1~6

[0027] Embodiment 1~6: Ag of different silicon source and silver source 2 O / SiO 2 Adsorption Performance of Composite Airgel on Thiophene Sulfides in Simulated Gasoline

[0028] Ag prepared by sol-gel method 2 O / SiO 2 In the composite airgel, the silicon sources used include methyl orthosilicate, ethyl orthosilicate, silica sol, and water glass, and the silver sources include silver nitrate and silver acetate. The prepared Ag 2 O / SiO 2 Composite aerogels were subjected to penetration adsorption desulfurization experiments. The specific operation was as follows: In the fixed bed reactor, the bottom layer was filled with an appropriate amount of absorbent cotton, and then filled with 1g of Ag 2 O / SiO 2 Airgel with appropriate amount of quartz sand. Before the adsorption experiment started, the packed adsorbent was fully wetted with n-heptane. Feed simulated gasoline, collect the adsorbed simulated gasoline at the outlet of the lower end of the reactor, and carry out chro...

Embodiment 7~13

[0032] Embodiment 7~13: the Ag of different silicon-silver molar ratio 2 O / SiO 2 Adsorption Performance of Composite Airgel on Thiophene Sulfides in Simulated Gasoline

[0033] Choose Ag with silicon-silver molar ratio of 1, 2, 5, 20, 50, 100, 200 respectively 2 O / SiO 2 Airgel, through adsorption experiments on thiophene sulfides in simulated gasoline. The operation of the breakthrough adsorption experiment is the same as in Examples 1-6, and the adsorption results are shown in Table 3.

[0034] Example

[0035] As can be seen from Table 3, Ag 2 O / SiO 2 The breakthrough adsorption capacity of airgel for thiophene and benzothiophene increases with the decrease of the molar ratio of silicon to silver, that is, the increase of silver content. When the silicon-silver molar ratio is less than 20, the breakthrough adsorption capacity of thiophene and benzothiophene basically does not increase, so Ag with a silicon-silver molar ratio of 2-20 is preferred. 2 O / SiO 2 ...

Embodiment example 14~18

[0036] Implementation Cases 14~18: Effects of Different Space Velocities on Ag 2 O / SiO 2 Adsorption Performance of Composite Airgel on Thiophene Sulfides in Simulated Gasoline

[0037] Ag with a molar ratio of silicon to silver of 5 2 O / SiO 2 Composite airgel. at an airspeed of 1 h -1 、3h -1 、5h -1 , 8 h -1 、10 h -1 Next, the breakthrough adsorption experiment was carried out on thiophene sulfides in simulated gasoline. The operation of the breakthrough adsorption experiment is the same as in Examples 1-6, and the adsorption results are shown in Table 4.

[0038] Example

[0039] It can be seen from Table 4 that the breakthrough adsorption capacity of thiophene and benzothiophene will gradually increase with the decrease of space velocity. When the space velocity decreases to 5 h -1 After that, the breakthrough adsorption capacity for thiophene sulfides does not change much, so the preferred space velocity is 1~5 h -1 .

[0040] Implementation Cases 19~23...

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Abstract

The invention discloses a method for removing thiophene sulfur in fuel oil by using Ag2O / SiO2 composite aerogel as an adsorbent, and belongs to the technical field of fuel oil processing. The method comprises the following steps: by taking tetramethyl orthosilicate, tetraethoxysilane, silica sol, sodium silicate and the like as silicon sources, and silver acetate, silver nitrate and the like as silver sources, preparing the Ag2O / SiO2 composite aerogel by adopting a sol gel-normal-pressure preparing drying method; quantitatively filling the aerogel into a fixed bed adsorption device, injecting model gasoline containing thiophene sulfur at certain temperature and air speed, collecting adsorbed model gasoline at the outlet in the lower end of a reaction device, and performing chromatographic analysis. The result shows that the Ag2O / SiO2 composite aerogel has a good adsorption property on thiophene sulfur. The Ag2O / SiO2 composite aerogel is simple in preparation method, low in cost, high in economic benefit, good in environment-friendliness, gentle in adsorption conditions and low in requirement on adsorption equipment, and can be repeatedly used.

Description

technical field [0001] The invention belongs to the technical field of fuel oil processing, and in particular relates to an Ag that is adsorbed by π complexation 2 O / SiO 2 Composite airgel desulfurization adsorbent and its preparation method and application in gasoline desulfurization. Background technique [0002] With the vigorous development of the automobile industry, the large amount of sulfide emissions from automobile exhaust not only makes environmental pollution more and more serious, but also threatens human health. Fuel cells also have very high requirements on the sulfur content in fuel oil. The presence of organic sulfides will poison the catalyst in the fuel cell electrodes, making the fuel cells unable to effectively convert the chemical energy in diesel gasoline into electrical energy. Therefore, the deep desulfurization of fuel oil has become the focus of global attention. [0003] At present, the desulfurization technology of fuel oil mainly includes hyd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G25/00B01J20/28B01J20/10B01D15/16B01J20/30
CPCB01D15/161B01D15/163B01J20/06B01J20/103B01J20/28064B01J20/28083B01J2220/42C10G25/00C10G2300/202
Inventor 张波王乐谢方缪光武门君
Owner ZHEJIANG UNIV OF TECH
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