Method of removing thiophene sulfur from fuel oil by Ag2O/SiO2-Al2O3-graphene oxide composite aerogel

A graphene composite and aerogel technology, which is applied in chemical instruments and methods, petroleum industry, alkali metal compounds, etc., to achieve the effects of improving high temperature resistance, strengthening the skeleton structure, and improving adsorption performance

Inactive Publication Date: 2018-07-24
ZHEJIANG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

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 -Al 2 o 3 - Graphene oxide composite airgel is used as an adsorbent, the adsorption conditions are mild, and the method for removing thiophene sulfur in fuel oil through π complex adsorption

Method used

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  • Method of removing thiophene sulfur from fuel oil by Ag2O/SiO2-Al2O3-graphene oxide composite aerogel
  • Method of removing thiophene sulfur from fuel oil by Ag2O/SiO2-Al2O3-graphene oxide composite aerogel
  • Method of removing thiophene sulfur from fuel oil by Ag2O/SiO2-Al2O3-graphene oxide composite aerogel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～8

[0030] Embodiments 1-8: Ag of different silicon sources, silver sources and aluminum sources 2 O / SiO 2 -Al 2 o 3 - Adsorption performance of graphene oxide composite airgel on thiophene sulfides in simulated gasoline

[0031] Ag prepared by sol-gel method 2 O / SiO 2 -Al 2 o 3 - In the graphene oxide composite airgel, the silicon source used includes methyl orthosilicate, ethyl orthosilicate, and silica sol, the silver source includes silver nitrate and silver acetate, and the aluminum source is aluminum nitrate and organic aluminum source. The prepared Ag 2 O / SiO 2 -Al 2 o 3 - Graphene oxide composite aerogel is used for penetration adsorption desulfurization experiment, the specific operation is as follows: In the fixed bed reactor, the bottom layer is filled with an appropriate amount of absorbent cotton, and then filled with 1g of Ag 2 O / SiO 2 -Al 2 o 3 - Graphene oxide airgel with appropriate amount of quartz sand. Before the adsorption experiment started, th...

Embodiment 9～14

[0039] Examples 9-14: Ag with different molar ratios of silicon to aluminum 2 O / SiO 2 -Al 2 o 3 - Adsorption performance of graphene oxide composite airgel on thiophene sulfides in simulated gasoline

[0040] Choose Ag with a silicon-silver molar ratio of 50:1 and a silicon-aluminum molar ratio of 25, 50, 75, 100, 125, and 150, respectively. 2 O / SiO 2 -Al 2 o 3 - Graphene oxide airgel, the penetration adsorption experiment of thiophene sulfides in simulated gasoline. The operation of the breakthrough adsorption experiment is the same as in Examples 1-8, and the adsorption results are shown in Table 4.

[0041] Table 4 Ag with different molar ratios of silicon to aluminum 2 O / SiO 2 -Al 2 o 3 Adsorption performance of graphene oxide composite airgel on thiophene sulfides in simulated gasoline

[0042]

[0043] As can be seen from Table 4, Ag with different molar ratios of silicon to aluminum 2 O / SiO 2 -Al 2 o 3 - With the decrease of silicon-aluminum molar rat...

Embodiment 15～18

[0044] Examples 15-18: Ag with different silicon-silver molar ratios 2 O / SiO 2 -Al 2 o 3 - Adsorption performance of graphene oxide composite airgel on thiophene sulfides in simulated gasoline

[0045] Ag with a silicon-silver molar ratio of 10, 20, 50, and 100 was selected. 2 O / SiO 2 -Al 2 o 3 - Graphene oxide airgel, the penetration adsorption experiment of thiophene sulfides in simulated gasoline. The operation of the breakthrough adsorption experiment is the same as in Examples 1-8, and the adsorption results are shown in Table 5.

[0046] Table 5 Ag with different molar ratios of silicon to silver 2 O / SiO 2 -Al 2 o 3 - Adsorption performance of graphene oxide composite airgel on thiophene sulfides in simulated gasoline

[0047]

[0048] It can be seen from Table 5 that Ag 2 O / SiO 2 -Al 2 o 3 - With the decrease of the silicon-silver molar ratio, that is, the increase of the silver content, the breakthrough adsorption capacity of graphene oxide airgel fo...

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Abstract

The invention relates to a method for removing thiophene sulfur from fuel oil by Ag2O / SiO2-Al2O3-graphene oxide composite aerogel and belongs to the technical field of fuel oil processing. The methodis characterized in that the Ag2O / SiO2-Al2O3-graphene oxide composite aerogel is prepared by taking silicon orthosilicate, tetraethyl orthosilicate, silica sol, water glass and the like as silicon sources, taking silver acetate, silver nitrate and the like as silver sources and taking aluminum nitrate, aluminum acetate and aluminum oxalate as aluminum sources and adopting a sol-gel and atmosphericpressure drying method. The Ag2O / SiO2-Al2O3-graphene oxide composite aerogel is quantitatively packed in a fixed bed adsorption device, simulated gasoline containing the thiophene sulfur is injectedat a certain temperature and airspeed, and the simulated gasoline after absorption is collected at an outlet in the lower end of a reaction device for chromatographic analysis. Results show that the Ag2O / SiO2-Al2O3-graphene oxide composite aerogel has good adsorption properties for the thiophene sulfur. The Ag2O / SiO2-Al2O3-graphene oxide composite aerogel absorbent in the method provided by the invention is simple in preparation method, low in cost, capable of reuse for many times, high in economic benefits, environmentally friendly, mild in absorption conditions and low in requirements for absorption equipment.

Description

technical field [0001] The invention belongs to the technical field of fuel oil processing, in particular to a kind of Ag with π complex adsorption 2 O / SiO 2 -Al 2 o 3 -Graphene oxide 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 mainl...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30C10G25/00
CPCB01J20/20B01J20/06B01J20/08B01J20/103B01J20/28047C10G25/003C10G2300/202
Inventor 张波蔡伟豪潘飞苗刘少博周金兵
Owner ZHEJIANG UNIV OF TECH
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