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Adsorbent for removal of benzothiophene from diesel oil and preparation method thereof

A technology of benzothiophene and adsorbent, applied in the field of adsorbent for removing benzothiophene from diesel oil and its preparation, can solve problems affecting the service life of the adsorbent, loss of cerium ions, etc., achieve good hydrothermal stability, reduce Drain, the effect that how to use is easy

Inactive Publication Date: 2013-03-13
CHANGCHUN UNIV OF TECH
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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
So far, there is no adsorbent for the removal of benzothiophene from diesel fuel, which is composed of yttrium oxide and sodium Y molecular sieve

Method used

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  • Adsorbent for removal of benzothiophene from diesel oil and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Weigh 10 g of sodium-type Y molecular sieve, 60 mL of Y(NO 3 ) 3 ·6H 2 O aqueous solution, stirred and mixed evenly in a batch kettle, soaked at 80°C for 20 hours, dried the solid in an oven at 100°C, raised the temperature to 450°C at a rate of 2°C / min in a muffle furnace, and maintained this temperature for 4 hours, a sodium-type Y molecular sieve adsorbent loaded with yttrium oxide (abbreviated as Y / Y molecular sieve adsorbent) was obtained, which was used as an adsorbent for removing benzothiophene from diesel.

[0018] Desulfurization: Weigh 0.1 g of Y / Y molecular sieve adsorbent, 6 mL of simulated diesel oil containing n-octane and benzothiophene, place the two in a batch kettle, and react for 1 hour at 50°C to simulate diesel oil The sulfur content of the diesel oil product is 60 mg / L, the sulfur content of the simulated diesel oil product after desulfurization is 0 mg / L, and the desulfurization rate is 100%.

Embodiment 2

[0022] 60 mL of 1 wt% Y(NO 3 ) 3 ·6H 2 O aqueous solution, at 50°C, impregnated for 10 hours, and the other conditions were the same as in Example 1, to obtain a sodium-type Y molecular sieve adsorbent loaded with yttrium oxide (abbreviated as Y / Y molecular sieve adsorbent), which was used as a method for removing benzothiophene from diesel oil. the adsorbent.

[0023] Desulfurization: Weigh 0.12 g of Y / Y molecular sieve adsorbent weight g and diesel volume mL in a ratio of 1:6 to 1:200, and place the two in an intermittent kettle, which is placed in an oil bath at 50 to 80°C , the desulfurization time is 0.5 to 4 hours; at 80 ° C, the reaction is 2 hours, and the rest of the conditions are the same as in Example 1. The sulfur content of the simulated diesel oil is 60 mg / L, after desulfurization, the sulfur content of the simulated diesel oil is 15 mg / L, and the desulfurization rate is 75%.

Embodiment 3

[0025] 60 mL of 10 wt% Y(NO 3 ) 3 ·6H 2 The aqueous solution of O was immersed at 50° C. for 5 hours, and other conditions were the same as in Example 1 to obtain a sodium-type Y molecular sieve adsorbent loaded with yttrium oxide, which was used as an adsorbent for removing benzothiophene in diesel oil.

[0026] Desulfurization: react for 0.5 hour, and all the other conditions are the same as in Example 1. The sulfur content of the simulated diesel oil is 60 mg / L. After desulfurization, the sulfur content of the simulated diesel oil is 6 mg / L, and the desulfurization rate is 90%.

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Abstract

The invention relates to an adsorbent for removal of benzothiophene from diesel oil and a preparation method thereof. The catalyst is composed of a NaY zeolite molecular sieve and a rare earth metal oxide modifying agent. The preparation method consists of: loading an oxide of rare-earth metal yttrium on the NaY zeolite molecular sieve through wet impregnation to perform combination and modification, thus obtaining the adsorbent. With the adsorbent, a desulfurization rate of 40-100% can be achieved on n-octane and benzothiophene-containing diesel oil with a sulfur content of 60-560mg / L. When applied to n-octane, benzothiophene and toluene-containing diesel oil with a sulfur content of 70-100mg / L and a toluene content of not higher than 40% by mass, the Na type Y molecular sieve adsorbent can achieve a desulfurization rate up to 25%. The adopted Na type Y molecular sieve has the advantages of wide source and easily available raw materials, no pollution, and good hydrothermal stability. The method employs equipment easy to operate under the atmospheric pressure, and the technological process is energy saving and environment-friendly, thus generating no harmful substance.

Description

[0001] technical field [0002] The invention relates to an adsorbent for highly selective removal of benzothiophene in diesel oil and a preparation method thereof. Background technique [0003] 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. [0004] 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 adsorp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/16B01J20/32C10G25/00
Inventor 孙林平李飞张龙
Owner CHANGCHUN UNIV OF TECH
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