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

A technology of activated carbon and active agent, applied in chemical instruments and methods, separation methods, other chemical processes, etc., can solve the problems of short service life of desulfurizers, reduced hydrogen sulfide removal rate, high application conditions, etc., and achieve low operating costs , long service life, simple and convenient operation

Inactive Publication Date: 2013-09-25
北京天灏柯润环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 8h, and dry it in vacuum at 105°C for 9h. 200g of active material mixture, including: 10g of sodium carbonate, 4g of iron nitrate, 4g of acetone, 0.6g of phenol, and 181.4g of ethanol. The mixed solution of the above active agent and the pretreated activated carbon were impregnated with the pretreated activated carbon at 25° C., and left to stand for 12 hours. The active agent mixed solution is twice the volume of activated carbon. Then the upper solution was discarded and dried at 100 °C for 4 h. Inert gas protection roasting activation at 300°C for 3h. A modified activated carbon desulfurizer is prepared. 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 is carried out in a fixed-bed reactor: the inner diameter o...

Embodiment 2

[0049] Weigh 50g of activated carbon, boil it in water at 90°C for 8h, and dry it in vacuum at 105°C for 9h. 300 g of active substance mixture, including: 21 g of sodium carbonate, 7.1 g of iron nitrate, 6 g of acetone, 0.9 g of phenol, and 265 g of ethanol. The mixed solution of the above-mentioned active agent and the pretreated activated carbon were impregnated at 50° C. and left to stand for 20 h. The active agent mixed solution is 3 times the volume of activated carbon. Then the upper layer solution was discarded and dried at 120 °C for 5 h. Activation by calcination under inert gas protection at 400°C for 5h. A modified activated carbon desulfurizer is prepared. 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 is carried out in a fixed-bed reactor: the inner diameter of the reactor is 14mm, the bed reaction temperatur...

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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 in particular relates to a modified activated carbon desulfurizer, 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 smelting products, will produce hydrogen sulfide (H 2 S) exhaust gas, if these exhaust gases are discharged into the atmosphere without treatment, they will not only pollute the air, but also threaten the health of the people when they reach a certain concentration, and under hot and humid conditions, they are severely corrosive to metal pipes and equipment, which may cause Destructive accidents happen. For this reason, our country and some foreign countries have studied H in different environments. 2 The permis...

Claims

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Application Information

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Patent Type & Authority Patents(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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