Method of removing thiophene sulfides in fuel oil by taking Ag2O/SiO2-ZrO2 compound aerogel as adsorbent

A composite airgel and adsorbent technology, applied in chemical instruments and methods, silicon compounds, separation methods, etc., to achieve the effects of improved adsorption performance, good adsorption performance, thermal stability and high mechanical strength

Active Publication Date: 2018-11-27
ZHEJIANG UNIV OF TECH
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Problems solved by technology

[0008] Aiming at the above-mentioned problems existing in existing π complex adsorbents in the removal of thiophene sulfides in fuel oil, the purpose of the present invention is to provide a Ag-based adsorbent with large adsorption capacity and easy regeneration. 2 O / SiO 2 -ZrO 2 Composite airgel as adsorbent, method for removing thiophene sulfides in fuel oil through the synergistic effect of π complex adsorption and acid-base action

Method used

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  • Method of removing thiophene sulfides in fuel oil by taking Ag2O/SiO2-ZrO2 compound aerogel as adsorbent
  • Method of removing thiophene sulfides in fuel oil by taking Ag2O/SiO2-ZrO2 compound aerogel as adsorbent
  • Method of removing thiophene sulfides in fuel oil by taking Ag2O/SiO2-ZrO2 compound aerogel as adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1~5

[0027] Embodiment 1~5: the Ag of different silicon source, silver source 2 O / SiO 2 -ZrO 2 Adsorption Performance of Composite Airgel on Thiophene Sulfides in Simulated Gasoline

[0028] Ag with a silicon-silver molar ratio of 50:1 and a silicon-zirconium molar ratio of 25:1 prepared by the sol-gel method 2 O / SiO 2 -ZrO 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 zirconium sources are zirconyl nitrate. The prepared Ag 2 O / SiO 2 -ZrO 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 -ZrO 2 Composite airgel with appropriate amount of quartz sand. Before the adsorption experiment started, the packed ...

Embodiment 6~10

[0034] Embodiment 6~10: the Ag of different silicon-zirconium molar ratio 2 O / SiO 2 -ZrO 2 Adsorption Performance of Composite Airgel on Thiophene Sulfides in Simulated Gasoline

[0035] Select silicon, silver molar ratio 50:1, silicon, zirconium molar ratio are respectively 15,25,50,100,150, other conditions are prepared with the Ag of embodiment 2 2 O / SiO 2 -ZrO 2 Composite airgel, through adsorption experiments on thiophene sulfides in simulated gasoline. The operation of the breakthrough adsorption experiment is the same as in Examples 1-5, and the adsorption results are shown in Table 3.

[0036] Table 3 Ag with different Si-Zr molar ratios 2 O / SiO 2 -ZrO 2 Adsorption Performance of Composite Airgel on Thiophene Sulfides in Simulated Gasoline

[0037]

[0038] It can be seen from Table 3 that the molar ratio of silicon and silver is 50:1, and Ag with different molar ratios of silicon and zirconium 2 O / SiO 2 -ZrO 2 As the molar ratio of silicon and zirconium...

Embodiment 11~14

[0039] Examples 11-14: Ag with different molar ratios of silicon to silver 2 O / SiO 2 -ZrO 2 Adsorption Performance of Composite Airgel on Thiophene Sulfides in Simulated Gasoline

[0040] Select silicon, zirconium molar ratio 25:1, silicon, silver molar ratio 10,20,50,100 respectively, other conditions are prepared with the Ag of embodiment 2 2 O / SiO 2 -ZrO 2 Composite airgel, through adsorption experiments on thiophene sulfides in simulated gasoline. The operation of the breakthrough adsorption experiment is the same as in Examples 1-5, and the adsorption results are shown in Table 4.

[0041] Table 4 Ag with different silicon-silver molar ratios 2 O / SiO 2 -ZrO 2 Adsorption Performance of Composite Airgel on Thiophene Sulfides in Simulated Gasoline

[0042]

[0043] It can be seen from Table 4 that the molar ratio of silicon to zirconium is 25:1, and Ag 2 O / SiO 2 -ZrO 2 The breakthrough adsorption capacity of composite aerogels for thiophene and benzothiophene ...

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Abstract

The invention discloses a method of removing thiophene sulfides in fuel oil by taking an Ag2O/SiO2-ZrO2 compound aerogel as an adsorbent. The method comprises the following steps: filling a fixed bedadsorption device with the Ag2O/SiO2-ZrO2 compound aerogel as the adsorbent; introducing simulated gasoline containing thiophene sulfur at an air speed of 1-10h<-1> at 0-100 DEG C; and adsorbing the simulated gasoline to obtain simulated gasoline, the sulfur concentration of which is smaller than 1ppm. According to the Ag2O/SiO2-ZrO2 compound aerogel, Zr<4+> is introduced in a silicon framework structure of the aerogel to generate an acid L, lone pair electrons on an S atom of the thiophene compound are alkaline, the thiophene sulfides can be adsorbed to the centre of the acid L of the aerogelmatrix Ag2O/SiO2-ZrO2 through acid and alkali action, and the adsorption property of the aerogel on the thiophene sulfides can be further improved by means of pi complexation and acid and alkali action. The adsorption reaction is carried out at a constant pressure, the adsorption conditions are mild, the demand on adsorption equipment is low, and the method is convenient to operate. A good adsorption effect on the thiophene compounds is obtained.

Description

technical field [0001] The invention belongs to the technical field of fuel oil processing, in particular to Ag 2 O / SiO 2 -ZrO 2 Composite airgel is a method for adsorbent to remove thiophene sulfides in fuel oil. 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 hydrodesulfurization technology, alkylation desulfurization technology, bio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G25/00C10G25/12B01J20/10B01J20/28B01J20/30B01J20/34
CPCB01J20/06B01J20/103B01J20/28014B01J20/3433B01J20/3475C10G25/003C10G25/12C10G2300/202
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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