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Method for removing thiophenes sulfur in fuel oil by using SiO2/Cu2O composite aerogel as adsorbent

A composite aerogel and adsorbent technology, which is applied in the direction of solid adsorbent liquid separation, separation methods, chemical instruments and methods, etc., to achieve the effects of convenient operation, mild adsorption conditions and low requirements

Inactive Publication Date: 2016-11-16
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned problems existing in the existing π-complex adsorbents in the removal of thiophene sulfur in fuel oil, the purpose of the present invention is to provide a SiO2 with mild adsorption conditions, convenient operation, superior adsorption performance, large adsorption capacity, and easy regeneration. 2 / Cu 2 O composite airgel method for removing thiophene sulfur from fuel oil by π complex adsorption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-6

[0020] Examples 1-6: SiO with different silicon and copper sources 2 / Cu 2 Effect of O composite airgel on adsorption of thiophene sulfides in simulated gasoline

[0021] SiO prepared by sol-gel method 2 / Cu 2 In the O composite airgel, the silicon sources used include tetraethyl orthosilicate and water glass, and the copper sources include copper chloride and copper acetate. The prepared SiO 2 / Cu 2 The O composite airgel 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 SiO 2 / Cu 2 O airgel with appropriate amount of quartz sand. Before the adsorption experiment started, the packed adsorbent was fully wetted with n-heptane. Feed simulated gasoline, and collect the adsorbed simulated gasoline at the outlet of the lower end of the reactor for gas chromatographic analysis. The ...

Embodiment 7-10

[0025] Examples 7-10: SiO with different silicon-to-copper molar ratios 2 / Cu 2 Effect of O composite airgel on adsorption of thiophene sulfides in simulated gasoline

[0026] SiO with a silicon-to-copper molar ratio of 40, 50, 75, and 150 was selected. 2 / Cu 2O airgel, breakthrough adsorption experiments on thiophene sulfides in simulated gasoline. The operation of the breakthrough adsorption experiment is the same as in Examples 1-6, and the adsorption results are shown in Table 3.

[0027] Example

[0028] As can be seen from Table 3, SiO 2 / Cu 2 The breakthrough adsorption capacity of O aerogels for thiophene and benzothiophene increases first and then decreases with the decrease of silicon-copper molar ratio, that is, the increase of copper content. When the molar ratio of silicon to copper is 50, the breakthrough adsorption capacity of thiophene and benzothiophene reaches the maximum, so SiO with a molar ratio of silicon to copper of 40~75 is preferred. ...

Embodiment 11-17

[0029] Examples 11-17: SiO 2 / CuO composite airgel reduced to SiO at different reduction temperatures 2 / Cu 2 Effect of O composite airgel on adsorption of thiophene sulfides in simulated gasoline

[0030] Select SiO with reduction temperatures of 100, 120, 1400, 160, 180, 200, 220°C 2 / Cu 2 O airgel, breakthrough adsorption experiments on thiophene sulfides in simulated gasoline. The operation of the breakthrough adsorption experiment is the same as in Examples 1-6, and the adsorption results are shown in Table 4.

[0031] Example

[0032] As can be seen from Table 4, SiO 2 / CuO airgel with the increase of reduction temperature, SiO 2 / Cu 2 The breakthrough adsorption capacity of O to thiophene and benzothiophene increases first and then decreases. When the reduction temperature is 120°C, the breakthrough adsorption capacity of thiophene and benzothiophene reaches the maximum, so the preferred reduction temperature is 100-160°C.

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Abstract

The invention discloses a method for removing thiophenes sulfur in fuel oil by using SiO2 / Cu2O composite aerogel as an adsorbent, and belongs to the technical field of fuel oil processing. The method is characterized by taking tetraethoxysilane as a silicon source and copper acetate as a copper source, and preparing the SiO2 / Cu2O composite aerogel by adopting a sol gelation-ambient pressure drying method; then filling a stationary bed adsorption device with the SiO2 / Cu2O composite aerogel; injecting simulated gasoline under certain temperature and certain flow. The simulated gasoline after being adsorbed can be collected at an outlet formed in the lower end of a reaction device, gas chromatography can be carried out, and a result shows that the SiO2 / Cu2O composite aerogel has good adsorption performance on both thiophene and benzothiophene. A preparation method of a SiO2 / Cu2O composite aerogel absorbent in the invention is simple, the cost is low, the SiO2 / Cu2O composite aerogel absorbent can be repeatedly used for many times, and the economic benefit is high; adsorption conditions are gentle, and requirements on an adsorption device are low.

Description

technical field [0001] The invention belongs to the technical field of fuel oil processing, and in particular relates to a SiO 2 / Cu 2 O-composite airgel is a method for adsorbents to remove thiophene sulfur from fuel oil through π-complex adsorption. 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. Therefore, the deep desulfurization of fuel oil has become the focus of attention of the whole society. [0003] At present, the desulfurization technology of fuel oil mainly includes hydrodesulfurization technology, alkylation desulfurization technology, biological desulfurization technology, extraction desulfurization technology, oxidation desulfurization technology, adsorption desulfurization technology, etc. Among them, the π complex adsorption desulfurization technology stands ou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/10B01J20/28C10G25/00B01D15/16B01J20/30
CPCC10G25/00B01D15/161B01D15/163B01J20/06B01J20/10B01J20/28064B01J20/28066B01J20/28083B01J2220/42C10G2300/202
Inventor 张波谢方王乐陈晶
Owner ZHEJIANG UNIV OF TECH
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