Method for removing thiophene sulfides in fuel oil by taking SiO2-APTES hybrid aerogel as adsorbent

A fuel oil and adsorbent technology, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc. General desulfurization performance and other problems, to achieve good adsorption effect, low requirements, high adsorption selectivity effect

Active Publication Date: 2019-02-19
ZHEJIANG UNIV OF TECH
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  • Claims
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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.
Zhejiang University of Technology (publication number CN 108192656A) adopts sol-gel-normal pressure drying method to prepare Ag 2 O / SiO 2 -Al 2 o 3 Composite airgel desulfurization adsorbent, the results show that it has good adsorption performance for thiophene sulfide in simulated gasoline, but in the solvent elution regeneration experiment due to Ag + loss, its regenerative performance is average
When there are aromatics and olefins in the simulated gasoline, compared with the microporous adsorbent, the Ag 2 O / SiO 2 -Al 2 o 3 Composite airgel desulfurization adsorbents are less affected by the competitive adsorption of aromatics and olefins, but their adsorption capacity is only half of that of simulated gasoline desulfurization without aromatics and olefins

Method used

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  • Method for removing thiophene sulfides in fuel oil by taking SiO2-APTES hybrid aerogel as adsorbent
  • Method for removing thiophene sulfides in fuel oil by taking SiO2-APTES hybrid aerogel as adsorbent
  • Method for removing thiophene sulfides in fuel oil by taking SiO2-APTES hybrid aerogel as adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0025] Embodiments 1-3: SiO of different silicon sources 2 - Adsorption performance of APTES hybrid airgel on thiophene sulfides in simulated gasoline.

[0026] SiO prepared by sol-gel method 2 -In the APTES hybrid airgel, the silicon sources used include methyl orthosilicate, ethyl orthosilicate, and silica sol, and the prepared SiO 2 -APTES hybrid airgel 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 SiO 2 -APTES hybrid 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 defined as the bre...

Embodiment 4～5

[0030] Embodiment 4-5: SiO of different ammonia sources 2 - Adsorption performance of APTES hybrid airgel on thiophene sulfides in simulated gasoline.

[0031] The selected ammonia sources include 3-aminopropyltriethoxysilane and 3-aminopropyltrimethoxysiloxane. 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 2.

[0032] Table 2 SiO of different ammonia sources 2 -Adsorption performance of APTES hybrid airgel on thiophene sulfides in simulated gasoline

[0033]

[0034] As can be seen from Table 2, the ammonia source should be selected from 3-aminopropyltriethoxysilane, and the synthesized SiO 2 -APTES hybrid airgel has the largest breakthrough adsorption capacity for thiophene, benzothiophene and dibenzothiophene in the breakthrough adsorption experiment.

[0035] In the following exam...

Embodiment 6～11

[0036] Examples 6-11: SiO with different molar ratios of silicon and ammonia 2 - Adsorption performance of APTES hybrid airgel on thiophene sulfides in simulated gasoline.

[0037] SiO with silicon and ammonia molar ratios of 4, 8, 12, 16, 32, and 64 were selected 2 -APTES hybrid aerogel, the breakthrough adsorption experiment of thiophene sulfide 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.

[0038] Table 3 SiO with different molar ratios of silicon to ammonia 2 -Adsorption performance of APTES hybrid airgel on thiophene sulfides in simulated gasoline

[0039]

[0040] It can be seen from Table 3 that SiO with different molar ratios of silicon to ammonia 2 - The breakthrough adsorption capacity of APTES hybrid aerogels for thiophene and benzothiophene increases first and then decreases with the increase of the molar ratio of silicon to ammonia. When the m...

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Abstract

The invention relates to a method for removing thiophene sulfides in fuel oil by taking SiO2-APTES hybrid aerogel as an adsorbent, and belongs to the technical field of fuel oil processing. Accordingto the method, methyl orthosilicate, tetraethoxysilane, silica sol, water glass and the like are taken as silicon sources, (3-aminopropyl)triethoxysilane and (3-aminopropyl)trimethoxysiloxane are taken as ammonia sources, the SiO2-APTES hybrid aerogel is prepared by a sol-gel atmospheric pressure drying method; a fixed bed adsorption device is filled with the SiO2-APTES hybrid aerogel, simulated gasoline containing the thiophene sulfides is injected at a certain temperature and airspeed, and the adsorbed simulated gasoline is collected for chromatographic analysis; results show that the SiO2-APTES hybrid aerogel has good adsorption property for the thiophene sulfides. The preparation method of the SiO2-APTES hybrid aerogel adsorbent is simple, and low in cost; the adsorbent can be repeatedly used, has high economic benefit, is environmentally friendly, has mild adsorption conditions and has low requirements on adsorption equipment.

Description

technical field [0001] The invention belongs to the technical field of fuel oil processing, in particular to SiO 2 - APTES hybrid 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 mainly includes hydrodesulfurization technology, alkylation desulfurizat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30C10G25/00
CPCB01J20/103B01J20/22C10G25/00B01J20/28047C10G2300/202
Inventor 陈飞帆张波卢永康刘少博周金兵
Owner ZHEJIANG UNIV OF TECH
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