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Adsorbent for removing benzothiophene in diesel and preparation method thereof

A benzothiophene and adsorbent technology, which is applied in the field of adsorbents for highly selective removal of benzothiophene in diesel oil, can solve the problems of affecting the service life of the adsorbent, loss of cerium ions, etc., achieves good hydrothermal stability, reduces Loss, the effect of improving the service life

Inactive Publication Date: 2012-11-07
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the process based on the S-M coordination mechanism, the adsorbent is introduced into the surface of the traditional Y molecular sieve with rare earth metal or transition metal ion or its oxide as the active center of adsorption, so as to achieve a certain desulfurization effect on sulfur-containing oils, and Most of them introduce rare earth cerium ions, but cerium ions will be lost during use, which will affect the service life of the adsorbent

Method used

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  • Adsorbent for removing benzothiophene in diesel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 2 g of sodium-type Y molecular sieves to 10 mL, 0.09 mol / L NaOH solution, put it into a crystallization kettle and mix evenly, react at 120 °C for 10 hours, vacuum filter, wash the solid matter, and wash with distilled water until it is washed. The pH value of the liquid is 7, put it into an oven at 100°C and dry it, then raise the temperature to 540°C in a muffle furnace at a rate of 5°C / min, and maintain this temperature for 4 hours to obtain an alkali-modified sodium Y molecular sieve, which is used as a removal Adsorbent for benzothiophene in diesel fuel.

[0022] Desulfurization: Weigh 1 g of alkali-modified sodium Y molecular sieve adsorbent, 6 mL of simulated diesel oil containing n-octane and benzothiophene, put the two in a batch kettle, and react at 50 ° C for 1 hour to simulate The sulfur content of the diesel oil is 60 mg / L, the sulfur content of the simulated diesel oil after desulfurization is 0 mg / L, and the desulfurization rate is 100%.

Embodiment 2

[0026] The concentration of NaOH solution was 0.2 mol / L, and the reaction was carried out at 80° C. for 20 hours. The rest was the same as in Example 1 to obtain an alkali-modified sodium Y molecular sieve, which was used as an adsorbent for removing benzothiophene from diesel.

[0027] Desulfurization: Weigh 0.06 g of alkali-modified sodium Y molecular sieve adsorbent and soak it at 80° C. for 4 hours, and the other conditions are the same as in Example 1. The sulfur content of the simulated diesel oil is 100 mg / L, the sulfur content of the desulfurized oil is 50 mg / L, and the desulfurization rate is 50%.

Embodiment 3

[0029] The concentration of the NaOH solution was 0.01 mol / L, the reaction temperature was 170° C., and the rest was the same as in Example 1 to obtain an alkali-modified sodium Y molecular sieve, which was used as an adsorbent for removing benzothiophene from diesel.

[0030] Desulfurization: Weigh 0.12 g of alkali-modified sodium-type Y molecular sieve adsorbent, soak for 2 hours, and the rest of the conditions are the same as in Example 1. The sulfur content of the simulated diesel oil is 100 mg / L, the sulfur content of the desulfurized oil is 33 mg / L, and the desulfurization rate is 67%.

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Abstract

The present invention relates to an adsorbent for removing benzothiophene in diesel and a preparation method thereof. The adsorbent comprises an alkali modified sodium-type Y molecular sieve and an alkali modified sodium-type Y molecular sieve supported with yttrium oxide. The alkali modified sodium-type Y molecular sieve is obtained by treating a sodium-type Y molecular with a sodium hydroxide solution; and the alkali modified sodium-type Y molecular sieve is treated with a wet impregnation to obtain the adsorbent consisting of alkali modified sodium-type Y molecular sieve supported with yttrium oxide. Preparation equipment of the adsorbent is simple, and a preparation process is energy-saving and environment-friendly, without generating any harmful substance. The adsorbent can, in the presence of a large amount of aromatic hydrocarbons, selectively remove benzothiophene in diesel, and realizes desulfurization rate of 50-100% on diesel containing octane and benzothiophene, and with a sulfur content of 60-560mg / L, and desulphurization rate as high as 16% on diesel containing normal octane, benzothiophene and toluene, and with a sulfur content of 70-100mg / L; and when a mass fraction of toluene is not higher than 40%, the adsorbent containing the alkali modified sodium-type Y molecular sieve supported with yttrium oxide has a highest desulfurization rate reaching 32%.

Description

technical field [0001] The invention relates to an adsorbent for highly selective removal of benzothiophene in diesel oil and a preparation method thereof. Background technique [0002] Acid rain is caused by organic sulfur compounds in oil. In order to remove organic sulfur compounds in oil, people have developed a variety of desulfurization methods, among which adsorption desulfurization has great development prospects. Adsorption desulfurization is a desulfurization process based on the selective removal of sulfide in oil by solid adsorbent. Faujasite is widely used in adsorption desulfurization due to its supercage structure. [0003] R.T.Yang [YangR.T, TakahashiA, YangFH, Ind.Eng.Chem.Res., 2001, 40:6236-6239] et al prepared CuY and AgY adsorbents by ion exchange method according to the π bond mechanism. Compared with NaY molecular sieves, CuY and AgY molecular sieves have a large adsorption capacity for thiophene and benzene at the same time, but the adsorption desu...

Claims

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Application Information

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IPC IPC(8): B01J20/18B01J20/32C10G25/05
Inventor 孙林平李飞张龙
Owner CHANGCHUN UNIV OF TECH
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