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Modified active carbon desulfurizer and preparation method thereof and treatment method of hydrogen sulfide waste gas

A technology of activated carbon and desulfurizer, applied in chemical instruments and methods, separation methods, other chemical processes, etc., can solve the problems of high application conditions, reduced hydrogen sulfide removal rate, short service life of desulfurizer, etc., and achieves simple operation. Convenience, easy access to raw materials, and low operating costs

Inactive Publication Date: 2012-06-20
北京天灏柯润环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main component of Chinese patent CN1415402A is ZnO-TiO 2 -Al 2 o 3 The desulfurizer can convert H 2 S and organic sulfur are removed at the same time, but it needs to be used at a high temperature of 180-320 ° C, which requires high application conditions.
Chinese patent CN1186841A proposes a modified activated carbon to desulfurize waste gas under normal temperature conditions, which can be used for the purification of chemical raw material gases such as synthetic ammonia, oil and natural gas, but mainly for organic sulfides (such as CS 2 ) has a good absorption effect, and has a good absorption effect on inorganic sulfides (such as sulfur H 2 S) The treatment effect of gas is poor
Using the above-mentioned modified activated carbon as a desulfurizer to remove hydrogen sulfide in exhaust gas requires regular desorption, regeneration, cleaning or replacement, and the hydrogen sulfide removal rate decreases with the prolongation of the use time of the desulfurizer, the service life of the desulfurizer is short, and the operating cost is high. , complicated operation and management

Method used

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  • Modified active carbon desulfurizer and preparation method thereof and treatment method of hydrogen sulfide waste gas
  • Modified active carbon desulfurizer and preparation method thereof and treatment method of hydrogen sulfide waste gas

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Experimental program
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Effect test

Embodiment 1

[0043] Weigh 50g of activated carbon, boil it in water at 60°C for 8 hours, and dry it in vacuum at 105°C for 9 hours. 200g of active material mixture, including: 10g of sodium carbonate, 4g of ferric nitrate, 4g of acetone, 0.6g of phenol, and 181.4g of ethanol. The mixed solution of the above-mentioned active agent and the pretreated activated carbon are immersed in the pretreated activated carbon at 25° C., and left to stand for 12 hours. The active agent mixed solution is twice the volume of the activated carbon. Then discard the upper layer solution and dry at 100°C for 4 hours. It is activated for 3 hours under inert gas protection at 300°C. Prepared modified activated carbon desulfurizer. The modified activated carbon desulfurizer has a bulk density of 725kg / m 3 ;The specific surface area is 1250m 2 / g; The specific pore volume is 0.60mL / g.

[0044] The sulfur capacity test of the obtained modified activated carbon desulfurizer was carried out in a fixed bed reactor: t...

Embodiment 2

[0049] Weigh 50g of activated carbon, boil it at 90°C for 8h, and dry it in vacuum at 105°C for 9h. 300g of active material mixture, including 21g of sodium carbonate, 7.1g of ferric nitrate, 6g of acetone, 0.9g of phenol, and 265g of ethanol. The mixed solution of the above-mentioned active agent and the pretreated activated carbon were immersed at 50° C., and left to stand for 20 hours. The active agent mixed solution is 3 times the volume of activated carbon. Then discard the upper layer solution and dry at 120°C for 5h. It is activated by inert gas roasting at 400℃ for 5h. Prepared modified activated carbon desulfurizer. Its bulk density is 700kg / m 3 ;The specific surface area is 1200m 2 / g; The specific pore volume is 0.50mL / g.

[0050] The sulfur capacity test of the obtained modified activated carbon desulfurizer was carried out in a fixed bed reactor: the inner diameter of the reactor was 14mm, the bed reaction temperature was 85°C, and the space velocity was 800~1000...

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Abstract

The invention belongs to the technical field of waste gas desulfurization and purification, particularly provides a modified active carbon desulfurizer and a preparation method thereof, and a hydrogen sulfide waste gas treatment method using the desulfurizer. The modified active carbon desulfurizer is prepared from impregnating activated carbon with active agent mixed solution comprising phenol, acetone, sodium carbonate, ferric nitrate and organic solvent, and drying and roasting the mixture. The modified active carbon desulfurizer converts the hydrogen sulfide in the waste gas into sulfur dioxide at atmospheric temperature and pressure under the absorption and catalytic oxidation action, and the sulfur dioxide is converted into SO42- in water phase by washing and removed. The waste gas treatment method uses the modified active carbon desulfurizer, and prevents the defects that the desulfurizer needs to be regularly desorbed and regenerated due to blockage caused by adsorption saturation and generated elemental sulfur. Compared with an ordinary activated carbon desulfurization process, the process has the advantages of high hydrogen sulfide removal rate, long service life of the desulfurizer, low operation cost, simplicity in operation and management and the like.

Description

Technical field [0001] The invention belongs to the technical field of desulfurization and purification of waste gas generated in petroleum and petrochemical production, and specifically relates to a modified activated carbon desulfurizer and a preparation method thereof, and a hydrogen sulfide waste gas treatment method using the desulfurizer. Background technique [0002] The main products in the petroleum and petrochemical field, petroleum, natural gas and various smelted products, will produce hydrogen sulfide (H2) in multiple links such as collection, storage and transportation, processing, and combustion. 2 S) waste gas. If the waste gas is discharged into the atmosphere without treatment, it will not only pollute the air, but also threaten the health of the population when it reaches a certain concentration. It is also severely corrosive to metal pipes and equipment under humid and hot conditions, which may cause A destructive accident occurred. For this reason, my country...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01D53/02B01D53/86B01D53/52B01J27/24
Inventor 李滢关宏讯王朝辉
Owner 北京天灏柯润环境科技有限公司
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