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Hydrogenation catalyst for sulfur-containing waste gas treatment and application thereof

A hydrogenation catalyst and exhaust gas treatment technology, applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve problems such as insufficient hydrogenation activity and desulfurization activity, high catalyst production costs, and affecting economic benefits. Achieve the effect of improving activation efficiency, improving pore properties, and improving utilization

Active Publication Date: 2021-04-06
乐山绿典节能环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydrogenation catalysts currently used in industrial plants generally have shortcomings such as insufficient hydrogenation activity and desulfurization activity, and high catalyst production costs, which affect economic benefits.

Method used

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  • Hydrogenation catalyst for sulfur-containing waste gas treatment and application thereof
  • Hydrogenation catalyst for sulfur-containing waste gas treatment and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A hydrogenation catalyst for treating sulfur-containing waste gas, the preparation method of which comprises:

[0019] S1, 5gY type molecular sieve (SiO 2 / Al 2 o 3 The molar ratio is 15, the unit cell parameter is 2.45nm, and the crystallization retention rate is greater than 95%) is added in 100mL of ammonium nitrate solution (10wt%), stirred at 100°C for 2h, filtered and washed with deionized water, and dried at 120°C for 16h, Obtain ammonia type molecular sieve;

[0020] S2. Add the above-mentioned ammonia-type molecular sieve to the mixed solution of cobalt nitrate and ammonium molybdate (specifically, 0.4716g cobalt nitrate hexahydrate and 0.7874g ammonium heptamolybdate tetrahydrate are dissolved in 10mL deionized water), stir well and then ultrasonic 0.5h, then impregnated at room temperature for 5h, then dried at 100°C for 8h, then placed in a muffle furnace, and roasted at 500°C for 6h to obtain a catalyst precursor;

[0021] S3. Add the above-mentioned ca...

Embodiment 2

[0023] A hydrogenation catalyst for treating sulfur-containing waste gas, the preparation method of which comprises:

[0024] S1, 5gY type molecular sieve (SiO 2 / Al 2 o 3 The molar ratio is 15, the unit cell parameter is 2.45nm, and the crystallization retention rate is greater than 95%) is added in 100mL of ammonium nitrate solution (10wt%), stirred at 100°C for 2h, filtered and washed with deionized water, and dried at 120°C for 16h, Obtain ammonia type molecular sieve;

[0025] S2. Add the above ammonia-type molecular sieve to the mixed solution of nickel nitrate and ammonium molybdate (specifically, add 0.4738g nickel nitrate hexahydrate and 0.7874g ammonium heptamolybdate tetrahydrate into 10mL deionized water to dissolve), stir well and then ultrasonic 0.5h, then impregnated at room temperature for 5h, then dried at 100°C for 8h, then placed in a muffle furnace, and roasted at 500°C for 6h to obtain a catalyst precursor;

[0026] S3. Add the above-mentioned catalyst...

Embodiment 3

[0028] A hydrogenation catalyst for treating sulfur-containing waste gas, the preparation method of which comprises:

[0029] S1, 5gY type molecular sieve (SiO 2 / Al 2 o 3 The molar ratio is 15, the unit cell parameter is 2.45nm, and the crystallization retention rate is greater than 95%) is added in 100mL of ammonium nitrate solution (10wt%), stirred at 100°C for 2h, filtered and washed with deionized water, and dried at 120°C for 16h, Obtain ammonia type molecular sieve;

[0030] S2. Add the above-mentioned ammonia-type molecular sieve to the mixed solution of nickel nitrate and ammonium metatungstate (specifically, add 0.4738g of nickel nitrate hexahydrate and 1.1596g of ammonium metatungstate hexahydrate into 10mL of deionized water to dissolve), and stir evenly Ultrasound for 0.5h, then impregnated at room temperature for 5h, then dried at 100°C for 8h, then placed in a muffle furnace, and calcined at 500°C for 6h to obtain a catalyst precursor;

[0031] S3. Add the a...

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Abstract

According to the present invention, the hydrogenation catalyst for sulfur-containing waste gas treatment and the application thereof are provided, and the catalyst is prepared through the following method: carrying out ammonium ion exchange on a molecular sieve to obtain an ammonia type molecular sieve; loading a hydrogenation active metal component onto the ammonia type molecular sieve by adopting an impregnation method to obtain a catalyst precursor; and coating the surface of the catalyst precursor with aluminum oxide to obtain the catalyst. The catalyst provided by the invention has the advantages of good desulfurization catalytic activity and selectivity and high stability.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a hydrogenation catalyst for treating sulfur-containing waste gas and its application. Background technique [0002] Gases such as coke oven gas, natural gas, petroleum-associated gas, and refinery waste gas contain a large amount of organic sulfur compounds, including carbonyl sulfide, sulfide, mercaptan, and thiophene. Harmful, and when these gases continue to be used in industrial production, organosulfur compounds will deactivate the catalyst used in industrial reactions, affect the catalytic performance of the catalyst, resulting in a decline in industrial yield, for example, when using coke oven gas to produce methanol , the general methanol synthesis catalyst requires the total sulfur content of coke oven gas to be less than 0.1ppm, and even more advanced methanol synthesis catalysts require the total sulfur content of coke oven gas to be less than 0.05ppm, otherwise the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/16B01D53/86B01D53/48B01D53/50
CPCB01J29/166B01D53/8603B01D53/8609B01D53/8606B01J2229/18Y02A50/20
Inventor 程鹏周典曹雨
Owner 乐山绿典节能环保科技有限公司
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