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ag 2 o/sio 2 -tio 2 Method for Composite Airgel Adsorption and Removal of Thiophene Sulfides in Fuel Oil

A composite airgel and fuel oil technology, applied in chemical instruments and methods, silicon compounds, alkali metal compounds, etc., to achieve the effects of convenient operation, mild adsorption conditions, and low requirements for adsorption equipment

Active Publication Date: 2021-08-31
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In view of the above-mentioned problems existing in existing π complex adsorbents in the removal of thiophene sulfur in fuel oil, the object of the present invention is to provide a Ag with large adsorption capacity and easy regeneration. 2 O / SiO 2 -TiO 2 Composite airgel is used as an adsorbent, the adsorption condition is mild, and the method for removing thiophene sulfur in fuel oil through the synergistic effect of π complex adsorption and acid-base action

Method used

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  • ag <sub>2</sub> o/sio <sub>2</sub> -tio <sub>2</sub> Method for Composite Airgel Adsorption and Removal of Thiophene Sulfides in Fuel Oil
  • ag <sub>2</sub> o/sio <sub>2</sub> -tio <sub>2</sub> Method for Composite Airgel Adsorption and Removal of Thiophene Sulfides in Fuel Oil
  • ag <sub>2</sub> o/sio <sub>2</sub> -tio <sub>2</sub> Method for Composite Airgel Adsorption and Removal of Thiophene Sulfides in Fuel Oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1~5

[0029] Embodiment 1~5: different silicon source, the Ag of silver source 2 O / SiO 2 -TiO 2 Adsorption Performance of Composite Airgel on Thiophene Sulfides in Simulated Gasoline

[0030] Ag prepared by sol-gel method 2 O / SiO 2 -TiO 2 In the composite airgel, the silicon sources used include methyl orthosilicate, ethyl orthosilicate, and silica sol, the silver sources include silver nitrate and silver acetate, and the titanium source is tetrabutyl titanate. The prepared Ag 2 O / SiO 2 -TiO 2 The composite aerogel was subjected to the penetration adsorption desulfurization experiment, and 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 1 g of Ag 2 O / SiO 2 -TiO 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 ...

Embodiment 9~14

[0036] Embodiment 9~14: Ag of different molar ratios of silicon and titanium 2 O / SiO 2 -TiO 2 Adsorption Performance of Composite Airgel on Thiophene Sulfides in Simulated Gasoline

[0037] Choose Ag with a silicon-silver molar ratio of 50:1 and a silicon-titanium molar ratio of 5, 25, 50, 100, 150, and 200, respectively. 2 O / SiO 2 -TiO 2 Airgel, through adsorption experiments on thiophene sulfides in simulated gasoline. The space velocity is 1~5 h -1 , the adsorption temperature is 0~40℃, and the sulfur concentration of thiophene or benzothiophene in simulated gasoline is 0.1~5 mgS / g. The operation of the breakthrough adsorption experiment is the same as in Examples 1-5, and the adsorption results are shown in Table 3.

[0038] Table 3 Ag with different silicon-titanium molar ratios 2 O / SiO 2 -TiO 2 Adsorption Performance of Composite Airgel on Thiophene Sulfides in Simulated Gasoline

[0039]

[0040] It can be seen from Table 3 that the molar ratio of silicon ...

Embodiment 15~18

[0041] Embodiment 15~18: Ag of different molar ratios of silicon to silver 2 O / SiO 2 -TiO 2 Adsorption Performance of Composite Airgel on Thiophene Sulfides in Simulated Gasoline

[0042] Choose Ag with silicon-titanium molar ratio of 50:1 and silicon-silver molar ratio of 10, 20, 50, 100 respectively 2 O / SiO 2 -TiO 2 Airgel, through adsorption experiments on thiophene sulfides in simulated gasoline. The space velocity is 1~5 h -1 , the adsorption temperature is 0~40℃, and the sulfur concentration of thiophene or benzothiophene in simulated gasoline is 0.1~5 mgS / g. The operation of the breakthrough adsorption experiment is the same as in Examples 1-8, and the adsorption results are shown in Table 4.

[0043] Table 4 Ag with different silicon-silver molar ratios 2 O / SiO 2 -TiO 2 Adsorption Performance of Composite Airgel on Thiophene Sulfides in Simulated Gasoline

[0044]

[0045] It can be seen from Table 4 that Ag 2 O / SiO 2 -TiO 2 The breakthrough adsorption...

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Abstract

Ag 2 O / SiO 2 -TiO 2 The invention relates to a method for adsorbing and removing thiophene sulfides in fuel oil by composite airgel, belonging to the technical field of fuel oil processing. The method uses methyl orthosilicate, ethyl orthosilicate, silica sol, water glass, etc. as silicon sources, silver acetate, silver nitrate, etc. as silver sources, tetrabutyl titanate as titanium source, and adopts sol-gel —Ag is produced by normal pressure drying method 2 O / SiO 2 -TiO 2 Composite airgel. Fill it quantitatively into a fixed-bed adsorption device, inject simulated gasoline containing thiophene sulfides at a certain temperature and space velocity, collect the adsorbed simulated gasoline at the outlet of the lower end of the reaction device, and conduct chromatographic analysis. The results showed that Ag 2 O / SiO 2 -TiO 2 Composite airgel has good adsorption properties for thiophene sulfides. Ag in the present invention 2 O / SiO 2 -TiO 2 The preparation method of the composite airgel adsorbent is simple and low in cost, the adsorbent can be repeatedly used, has high economic benefits, is environmentally friendly, has mild adsorption conditions, and has low requirements on adsorption equipment.

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 -TiO 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 incl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/10B01J20/28B01J20/30C10G25/00
CPCB01J20/06B01J20/103B01J20/28047B01J20/28064B01J20/28066B01J20/28083C10G25/003C10G2300/202
Inventor 周金兵张波刘少博陈飞帆卢永康潘飞苗蔡伟豪
Owner ZHEJIANG UNIV OF TECH
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