Sulfur transfer agent with surface rich in alkaline sites and preparation method thereof

A technology of sulfur transfer agent and site, applied in the direction of separation methods, chemical instruments and methods, and other chemical processes, can solve the problems of high wear index of additives, unsatisfactory desulfurization effect, high specific surface area, etc., and achieve good wear index, The effect of additives with many basic sites and large specific surface area

Active Publication Date: 2021-06-29
REZEL CATALYSTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The existing sulfur transfer agent is mainly magnesium-aluminum spinel series. In the case of high magnesium oxide content, the specific surface area of ​​this additive is low, the wear index of the additive is high, and the life of the additive is short.
In the case of low magnesium oxide content, the specific surface area of ​​the additive is high and the wear performance is good, but the desulfurization effect is not ideal

Method used

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  • Sulfur transfer agent with surface rich in alkaline sites and preparation method thereof
  • Sulfur transfer agent with surface rich in alkaline sites and preparation method thereof
  • Sulfur transfer agent with surface rich in alkaline sites and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Add 0.589kg of pseudo-boehmite (dry basis) into 7.5kg of water, add 0.35kg of formic acid under stirring conditions (130 rpm), and mark it as slurry A.

[0053] 0.21 kg of magnesium oxide (dry basis) was dispersed in 0.6 kg of water, marked as slurry B.

[0054] 0.54kg cerium chloride solution (containing 18% CeO 2 ) into 0.1 kg of water, marked as liquid C.

[0055] 48g ammonium metavanadate (containing 36.6g V 2 o 5 ) was added to 0.3kg of water, and 0.1kg of formic acid was added under stirring conditions (130 rpm), marked as liquid D.

[0056] Put A, B, C, and D into the colloid mill (rotating speed 2900 rpm, processing precision 2-40 microns) in sequence for 10 minutes, and then spray molding. Baked at 700°C for 2h, marked as S1.

[0057] The element composition, specific surface area, wear index and particle size distribution of S1 are shown in Table 1 and Table 2. CO of S1 2 adsorption infrared see figure 2 . S1 and H 2 Reduction of regenerated S1 to S...

Embodiment 2

[0059] Add 0.589kg of pseudo-boehmite (dry basis) into 7.5kg of water, add 0.35kg of formic acid under stirring conditions (130 rpm), and mark it as slurry A.

[0060] 0.21 kg of magnesium oxide (dry basis) was dispersed in 0.6 kg of water, marked as slurry B.

[0061] 0.54kg cerium chloride solution (containing 18% CeO 2 ), 50g ferric chloride (containing 14.5g Fe 2 o 3 ) into 0.1 kg of water, marked as liquid C.

[0062] 48g ammonium metavanadate (containing 36.6g V 2 o 5 ) was added to 0.3kg of water, and 0.1kg of formic acid was added under stirring conditions (130 rpm), marked as liquid D.

[0063] Put A, B, C, and D into the colloid mill (rotating speed 2900 rpm, processing precision 2-40 microns) in sequence for 10 minutes, and then spray molding. Baked at 700°C for 2 hours, marked as S2.

[0064] The element composition, specific surface area, wear index and particle size distribution of S2 are shown in Table 1 and Table 2. CO of S2 2 adsorption infrared see ...

Embodiment 3

[0066] Add 0.589kg of pseudo-boehmite (dry basis) into 7.5kg of water, add 0.35kg of formic acid under stirring conditions (130 rpm), and mark it as slurry A.

[0067] 0.23 kg of magnesium oxide (dry basis) was dispersed in 0.6 kg of water, marked as slurry B.

[0068] 0.54kg cerium chloride solution (containing 18% CeO 2 ), 81g ferric chloride (containing 23.5g Fe 2 o 3 ) into 0.1 kg of water, marked as liquid C.

[0069] 48g ammonium metavanadate (containing 36.6g V 2 o 5 ) was added to 0.3kg of water, and 0.1kg of formic acid was added under stirring conditions (130 rpm), marked as liquid D.

[0070] Put A, B, C, and D into the colloid mill (rotating speed 2900 rpm, processing precision 2-40 microns) in sequence for 10 minutes, and then spray molding. Baked at 700°C for 2 hours, marked as S3.

[0071] The element composition, specific surface area, wear index and particle size distribution of S3 are shown in Table 1 and Table 2. CO of S3 2 adsorption infrared see ...

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Abstract

The invention discloses a sulfur transfer agent with the surface rich in alkaline sites and a preparation method thereof. The sulfur transfer agent comprises the following components: 40-70% of Al2O3, 15-25% of MgO, 2-15% of CeO2, 1.5-3.6% of V2O5 and 0-2.1% of Fe2O3, and obvious CO3 < 2-> and HCO3 <-> infrared peaks can be seen in a CO2 adsorption infrared spectrum of the sulfur transfer agent. The preparation method comprises the following steps of: quickly stirring pseudo-boehmite slurry, magnesium oxide slurry, a cerium compound solution and an ammonium metavanadate solution in a colloid mill at a high speed, carrying out spray molding, and roasting to obtain the sulfur transfer agent. As the raw materials are mixed and homogenized by a rapid colloid mill, the contact time of MgO and an acid-containing solution is shortened, the prepared product contains a large amount of isolated MgO, and the auxiliary agent has the advantages of multiple alkaline sites, large specific surface area, good wear index, high SOx adsorption speed and high adsorption capacity.

Description

technical field [0001] The invention relates to the technical field of flue gas desulfurization in oil refining industry, more specifically, the invention relates to a sulfur transfer agent with a surface rich in basic sites and a preparation method thereof. Background technique [0002] Sulfurized catalytic cracking (FCC) is an important process for the production of gasoline, diesel and liquefied petroleum gas in today's petroleum industry. Typically, 45%-55% of the sulfur in the FCC feedstock is converted to H in the reactor 2 S, into the dry gas; 35%-45% into the liquid product; 5%-10% deposited on the surface of the catalyst, brought into the regenerator with coke, and generates SO during the regeneration process x , discharged into the atmosphere together with the flue gas, causing pollution to the environment. [0003] In the regenerator, sulfur mainly participates in the following reactions: [0004] Coke S+O 2 → SO 2 (>90%)+SO 3 (<10%); [0005] SO 2 +...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/08B01J20/30B01D53/02
CPCB01J20/041B01J20/08B01J20/0211B01J20/0203B01D53/02B01D2257/302Y02C20/40
Inventor 卓润生施宗波刘新生文奇张青陈韩莉胡泽松
Owner REZEL CATALYSTS CO LTD
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