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Method for removing thiophene sulfides in fuel oil by using SiO2-MTES-graphene oxide composite aerogel as adsorbent

A graphene composite and sulfide technology, which is applied in the direction of alkali metal oxides/hydroxides, alkali metal compounds, chemical instruments and methods, etc., can solve the problem of low dispersion of active components, general adsorption and desulfurization performance, and problems with adsorbents. The specific surface area is not large, and the specific surface area is increased, the requirements are low, and the operation is convenient.

Active Publication Date: 2019-10-22
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the specific surface area of ​​the adsorbent is not large, and the dispersion of the loaded active components is not high, resulting in general adsorption and desulfurization performance.

Method used

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  • Method for removing thiophene sulfides in fuel oil by using SiO2-MTES-graphene oxide composite aerogel as adsorbent
  • Method for removing thiophene sulfides in fuel oil by using SiO2-MTES-graphene oxide composite aerogel as adsorbent
  • Method for removing thiophene sulfides in fuel oil by using SiO2-MTES-graphene oxide composite aerogel as adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0023] Embodiments 1-3: SiO of different silicon sources 2 - Adsorption performance of MTES-graphene oxide composite airgel on thiophene sulfides in simulated gasoline.

[0024] Select SiO with a mass percentage of graphene oxide of 0.21wt‰ 2 - MTES-graphene oxide composite airgel. SiO prepared by sol-gel method 2 -In the MTES-graphene oxide composite airgel, the silicon sources used include methyl orthosilicate, ethyl orthosilicate, and silica sol, and the prepared SiO 2 -MTES-graphene oxide composite aerogel was 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 SiO 2 -MTES-graphene oxide composite 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 gaso...

Embodiment 4～8

[0029] Examples 4-8: Adsorption performance of graphene oxide composite aerogels with different graphene oxide mass percentages on thiophene sulfides in simulated gasoline.

[0030] Select SiO with mass percentages of graphene oxide of 0.05wt‰, 0.11wt‰, 0.21wt‰, 0.43wt‰, and 0.64wt‰ 2 - MTES-graphene oxide composite airgel was used for penetration adsorption experiments on thiophene sulfides in simulated gasoline. The operation of the breakthrough adsorption experiment was the same as in Examples 1-3, and the adsorption results are shown in Table 2.

[0031] Table 2 SiO with different mass percentages of graphene oxide 2 - Adsorption performance of MTES-graphene oxide composite airgel on thiophene sulfides in simulated gasoline

[0032]

[0033] As can be seen from Table 2, SiO with different mass percentages of graphene oxide 2 -MTES-graphene oxide composite aerogel's breakthrough adsorption capacity for thiophene and benzothiophene increases first and then decreases wi...

Embodiment example 9～13

[0034] Implementation Cases 9~13: Effects of different space velocities on SiO 2 - Adsorption performance of MTES-graphene oxide composite airgel on thiophene sulfides in simulated gasoline

[0035] Select SiO with a mass percentage of graphene oxide of 0.21wt‰ 2 - MTES-graphene oxide composite airgel. at an airspeed of 1h -1 、3h -1 、5h -1 、8h -1 、10h -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 1-3, and the adsorption results are shown in Table 3.

[0036] Table 3 SiO at different space velocities 2 - Adsorption performance of MTES-graphene oxide composite airgel on thiophene sulfides in simulated gasoline

[0037]

[0038] It can be seen from Table 3 that as the space velocity decreases, the breakthrough adsorption capacity of p-thiophene, benzothiophene and dibenzothiophene will gradually increase. When the space velo...

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Abstract

The invention discloses a method for removing thiophene sulfides in fuel oil by using SiO2-MTES-graphene composite aerogel as an adsorbent. The method comprises the following steps: using tetramethylorthosilicate, tetraethyl orthosilicate, silica sol and water glass as a silicon source, introducing methyltriethoxysilane for modification, adding graphene oxide to improve the mechanical performances, provide abundant oxygen-containing functional groups and increase the adsorption capacity, preparing the SiO2-MTES-graphene composite aerogel through a sol gel-normal pressure drying process, quantitatively filling a fixed bed adsorption device with the SiO2-MTES-graphene composite aerogel, injecting simulated gasoline containing thiophene sulfides at a certain temperature and a certain air speed, collecting the adsorbed simulated gasoline, and performing chromatographic analysis. A result shows that the SiO2-MTES-graphene composite aerogel has an excellent adsorption performance for thiophene sulfides. The preparation method of the SiO2-MTES-graphene composite aerogel adsorbent has the advantages of simplicity, and low cost; and the adsorbent has the advantages of repeatability, high economic benefit, environmental friendliness, mild adsorption conditions, and low requirements for the adsorption device.

Description

technical field [0001] The invention belongs to the technical field of fuel oil processing, in particular to a SiO 2 -MTES-graphene oxide 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 technolo...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/28B01J20/30C10G25/00C10G25/12
CPCB01J20/22B01J20/103B01J20/28047B01J20/28083B01J20/28064B01J20/28066B01J20/20B01J20/28054C10G25/003C10G25/12C10G2400/02C10G2300/201
Inventor 张波陈飞帆卢永康殷路霞
Owner ZHEJIANG UNIV OF TECH