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Method for removing thiophenic sulfur in fuel oil by using Ag2O/SiO2-graphene oxide composite aerogel as adsorbent

A graphene composite, aerogel technology, applied in chemical instruments and methods, petroleum industry, alkali metal compounds, etc., to achieve the effects of good adsorption performance, improved high temperature resistance, and convenient operation

Inactive Publication Date: 2018-07-31
ZHEJIANG UNIV OF TECH
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  • Abstract
  • Description
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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 purpose of the present invention is to provide a Ag with large adsorption capacity and easy regeneration. 2 O / SiO 2 - 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 for removing thiophenic sulfur in fuel oil by using Ag2O/SiO2-graphene oxide composite aerogel as adsorbent
  • Method for removing thiophenic sulfur in fuel oil by using Ag2O/SiO2-graphene oxide composite aerogel as adsorbent
  • Method for removing thiophenic sulfur in fuel oil by using Ag2O/SiO2-graphene oxide composite aerogel as adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0030] Embodiment 1~5: different silicon source, the Ag of silver source 2 O / SiO 2 - Adsorption performance of graphene oxide composite airgel on thiophene sulfides in simulated gasoline

[0031] Ag prepared by sol-gel method 2 O / SiO 2 - In the graphene oxide composite airgel, the silicon sources used include methyl orthosilicate, ethyl orthosilicate, and silica sol, and the silver sources include silver nitrate and silver acetate. The prepared Ag 2 O / SiO 2 - 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 - Graphene oxide 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 th...

Embodiment 6～9

[0038] Embodiments 6-9: Ag with different molar ratios of silicon to silver 2 O / SiO 2 - Adsorption performance of graphene oxide composite airgel on thiophene sulfides in simulated gasoline

[0039] Ag with a silicon-silver molar ratio of 1, 3, 5, and 10 was selected. 2 O / SiO 2 - 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 1-5, and the adsorption results are shown in Table 3.

[0040] Table 3 Ag with different silicon-silver molar ratios 2 O / SiO 2 - Adsorption performance of graphene oxide composite airgel on thiophene sulfides in simulated gasoline

[0041]

[0042] As can be seen from Table 3, Ag 2 O / SiO 2 - 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 for thiophene and benzothiophene increases first and then...

Embodiment example 10～15

[0043] Implementation Cases 10-15: Effects of Different Contents of Graphene Oxide on Ag 2 O / SiO 2 - Adsorption performance of graphene oxide composite airgel on thiophene sulfides in simulated gasoline

[0044] The amount of graphene oxide incorporated is 0.5mg, 1.5mg, 3.5mg, 4.5mg, 6.5mg, 8.5mg of Ag 2 O / SiO 2 - 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 1-5, and the adsorption results are shown in Table 4.

[0045] Table 4 Ag doped with different contents of graphene oxide 2 O / SiO 2 - Adsorption performance of graphene oxide composite airgel on thiophene sulfides in simulated gasoline

[0046]

[0047]

[0048] It can be seen from Table 4 that Ag 2 O / SiO 2 - With the increase of graphene oxide incorporation in graphene oxide airgel, the breakthrough adsorption capacity of thiophene and benzothiophene increases first ...

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Abstract

The invention relates to a method for removing thiophenic sulfur in fuel oil by using an Ag2O / SiO2-graphene oxide composite aerogel as an adsorbent, and belongs to the technical field of fuel oil processing. According to the method, methyl orthosilicate, tetraethyl orthosilicate, silica sol, water glass and the like are used as a silicon source, silver acetate, silver nitrate and the like are usedas a silver source, and the Ag2O / SiO2-graphene oxide composite aerogel is obtained by a sol-gel-normal pressure drying method. The Ag2O / SiO2-graphene oxide composite aerogel is quantitatively filledin a fixed bed adsorption device, simulated gasoline containing the thiophenic sulfur is injected into the adsorbed simulated gasoline at a certain temperature and space velocity into the fixed bed adsorption device, and the adsorbed simulated gasoline is collected at the lower end outlet of the device for chromatographic analysis. Results show that the Ag2O / SiO2-graphene oxide composite aerogel has good adsorption properties for the thiophenic sulfur. The preparation method of the Ag2O / SiO2-graphene oxide composite aerogel adsorben is simple and low in cost, and the adsorbent can be repeatedly used, has high economic efficiency, is environmentally friendly, and has mild adsorption conditions and 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 -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 mai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G25/00B01J20/20B01J20/28
CPCC10G25/003B01J20/06B01J20/103B01J20/20B01J20/28047B01J2220/42B01J2220/4806B01J2220/4812C10G2300/202C10G2400/02
Inventor 张波潘飞苗蔡伟豪刘少博周金兵
Owner ZHEJIANG UNIV OF TECH
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