Method for removing thiophene sulfides in fuel oil by using SiO2-MTES-APTES-Ag composite aerogel

A composite aerogel and sulfide technology, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve the problem of low adsorption capacity, increased specific surface area, and reduced pore size collapse and other problems, to achieve the effect of increasing the specific surface area, improving the adsorption performance, and mild adsorption conditions.

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

AI Technical Summary

Problems solved by technology

But SiO 2 -APTES airgel has the disadvantage of low adsorption capacity, by adding MTES, the SiO 2 Surface introduction of -CH 3 Improve the hydrophobicity, so that the pore size collapse decreases during the normal pressure drying process, thereby increasing the specific surface area

Method used

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  • Method for removing thiophene sulfides in fuel oil by using SiO2-MTES-APTES-Ag composite aerogel
  • Method for removing thiophene sulfides in fuel oil by using SiO2-MTES-APTES-Ag composite aerogel
  • Method for removing thiophene sulfides in fuel oil by using SiO2-MTES-APTES-Ag composite aerogel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0029] Examples 1-5: SiO with different silicon-silver molar ratios 2 - Adsorption performance of MTES-APTES-Ag composite airgel for thiophene sulfides in simulated gasoline.

[0030] SiO prepared by sol-gel method 2 -In the MTES-APTES-Ag composite airgel, the silicon source used is ethyl orthosilicate, and the prepared SiO 2 -MTES-APTES-Ag composite airgel 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-APTES-Ag 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 gasoline at the outlet of the lower end of the reactor, and carry out chromatographic analysis. When the sulfur concentration in the effluent is 0.005mgS / g, it is defi...

Embodiment example 6～10

[0034] Implementation Cases 6-10: Effects of different space velocities on SiO 2 - Adsorption performance of MTES-APTES-Ag composite airgel for thiophene sulfides in simulated gasoline

[0035] Choose SiO with a silicon-silver molar ratio of 37.5:1 2 - MTES-APTES-Ag 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 1-5, and the adsorption results are shown in Table 2.

[0036] Table 2 SiO at different space velocities 2 - Adsorption performance of MTES-APTES-Ag composite airgel for thiophene sulfides in simulated gasoline

[0037]

[0038] It can be seen from Table 2 that as the space velocity decreases, the SiO 2 -The breakthrough adsorption capacity of MTES-APTES-Ag composite airgel to thiophene, benzothiophene and dibenzothiophene will gradually increase,...

Embodiment example 11～15

[0039] Implementation Cases 11-15: Effects of different adsorption temperatures on SiO 2 - Adsorption performance of MTES-APTES-Ag composite airgel for thiophene sulfides in simulated gasoline

[0040] Choose SiO with a silicon-silver molar ratio of 37.5:1 2 - MTES-APTES-Ag composite airgel. The adsorption temperature was selected as 0°C, 25°C, 40°C, 80°C, and 100°C, respectively, and the penetration adsorption experiments were carried out on thiophene sulfides in simulated gasoline. The operation of the breakthrough adsorption experiment was the same as in Examples 1-5, and the adsorption results are shown in Table 3.

[0041] Table 3 SiO at different adsorption temperatures 2 - Adsorption performance of MTES-APTES-Ag composite airgel for thiophene sulfides in simulated gasoline

[0042]

[0043] It can be seen from Table 3 that with the increase of adsorption temperature, SiO 2 -The breakthrough adsorption capacity of MTES-APTES-Ag composite airgel for thiophene, ben...

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Abstract

The invention discloses a method for removing thiophene sulfides in fuel oil by using SiO2-MTES-APTES-Ag composite aerogel, and belongs to the technical field of fuel oil processing. The method comprises the following steps: using tetraethyl orthosilicate as a silicon source and 3-aminopropyltriethoxysilane as an ammonia source, introducing methyltriethoxysilane for modification, using silver nitrate as a silver source, preparing the SiO2-MTES-APTES-Ag composite aerogel through a sol gel-normal pressure drying process, quantitatively filling a fixed bed adsorption device with the SiO2-MTES-APTES-Ag composite aerogel, injecting simulated gasoline containing thiophene sulfides at a certain temperature and a certain air speed, collecting the adsorbed simulated gasoline from the lower end outlet of the reaction device, and performing chromatographic analysis. A result shows that the SiO2-MTES-APTES-Ag composite aerogel has an excellent adsorption property for thiophene sulfides. The preparation method of the SiO2-MTES-APTES-Ag 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-APTES-Ag 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, b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30C10G25/00C10G25/12
CPCB01J20/22B01J20/103B01J20/28047B01J20/28083B01J20/28064B01J20/28066B01J20/28054C10G25/003C10G25/12C10G2400/02C10G2300/201
Inventor 陈飞帆张波卢永康殷路霞
Owner ZHEJIANG UNIV OF TECH
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