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Iron-based composite desulfurizing agent and preparation method thereof and application of iron-based composite desulfurizing agent in removal of hydrogen sulfide in gas

A degassing, composite technology, applied in separation methods, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as low desulfurization activity

Active Publication Date: 2021-04-30
中峰信和(大连)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention solves the problem that iron-based desulfurizers in the prior art contain a large amount of CO at low temperature 2 The problem that the desulfurization activity of the industrial gas is still low, and then provide a method for removing hydrogen sulfide in the gas at low temperature by an iron-based composite desulfurizer. The iron-based composite desulfurizer used has a simple preparation process, low production cost, and excellent performance. desulfurization activity, and suitable for high concentration CO 2 Atmosphere desulfurization

Method used

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  • Iron-based composite desulfurizing agent and preparation method thereof and application of iron-based composite desulfurizing agent in removal of hydrogen sulfide in gas
  • Iron-based composite desulfurizing agent and preparation method thereof and application of iron-based composite desulfurizing agent in removal of hydrogen sulfide in gas
  • Iron-based composite desulfurizing agent and preparation method thereof and application of iron-based composite desulfurizing agent in removal of hydrogen sulfide in gas

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Experimental program
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Effect test

Embodiment 1

[0043] (1) FeCl 3 ·6H 2 O is completely dissolved in deionized water to form an iron salt solution, and the iron ion concentration in the iron salt solution is 0.1mol / L;

[0044] (2) adding multi-walled carbon nanotubes to the iron salt solution, stirring evenly to obtain a mixed solution, ultrasonically treating the mixed solution for 1 hour, and then transferring to a water bath and heating to 25° C.;

[0045] (3) Under constant stirring, add a potassium hydroxide solution with a concentration of 1mol / L as a precipitating agent to the above mixed solution, adjust the pH to 7, and form a suspension; age the above suspension in the mother liquor for 3 hours, and The heating temperature was 25°C, and continuous stirring was maintained during this period.

[0046] (4) Suction filter the above suspension to collect the precipitate; the obtained precipitate is washed with deionized water, then dried at 100°C for 4 hours, and finally processed into 40-60 mesh by grinding, tableti...

Embodiment 2

[0053] (1) FeCl 3 ·6H 2 O is completely dissolved in deionized water to form an iron salt solution, and the iron ion concentration in the iron salt solution is 0.1mol / L;

[0054] (2) Add multi-walled carbon nanotubes to the above iron salt solution, stir to obtain a mixed solution, ultrasonically treat the mixed solution for 1 hour, then transfer to a water bath and heat to 25, 40, 60, 80 and 100°C respectively ;

[0055] (3) Under constant stirring, add a potassium hydroxide aqueous solution with a concentration of 1mol / L as a precipitating agent to the above mixed solution, adjust the pH to 7, and form a suspension; age the above suspension in the mother liquor for 3 hours, and The heating temperature was 25°C, and continuous stirring was maintained during this period.

[0056] (4) Suction filter the above suspension to collect the precipitate; the obtained precipitate is washed with deionized water, then dried at 100°C for 4 hours, and finally processed into 40-60 mesh b...

Embodiment 3

[0062] (1) FeCl 3 ·6H 2 O is completely dissolved in deionized water to form an iron salt solution, and the iron ion concentration in the iron salt solution is 0.1mol / L;

[0063] (2) adding multi-walled carbon nanotubes to the iron salt solution, and stirring evenly to obtain a mixed solution; ultrasonically treating the mixed solution for 1 hour, then transferring to a water bath and heating to 60° C.;

[0064] (3) Under constant stirring, add a potassium hydroxide aqueous solution with a concentration of 1mol / L as a precipitating agent to the above mixed solution, and adjust the pH to 3, 5, 7, 9 and 11 respectively to form a suspension; Aging in the mother liquor for 3 hours at an aging temperature of 60° C. during which continuous stirring was maintained.

[0065] (4) Suction filter the above suspension to collect the precipitate; the obtained precipitate is washed with deionized water, then dried at 100°C for 4 hours, and finally processed into 40-60 mesh by grinding, ta...

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Abstract

The invention provides an iron-based composite desulfurizing agent and a preparation method thereof and application of the iron-based composite desulfurizing agent in removal of hydrogen sulfide in gas, the iron-based composite desulfurizing agent comprises carbon nanotubes and ferric oxide hydrate loaded on the carbon nanotubes, and the mass percentage of ferric oxide hydrate in the desulfurizing agent is 50-90%. According to the method, the carbon nanotubes serving as a high-conductivity material are introduced into the desulfurizing agent for modification for the first time, and rich point defects and surface hydroxyl groups are formed on the surface of ferric oxide hydrate by utilizing strong interaction between the carbon nanotubes and the ferric oxide hydrate, so that the dispersity of the ferric oxide hydrate is improved, and the desulfurization activity and sulfur capacity of the ferric oxide hydrate are improved. Fe-O-C chemical bonds are formed between ferric oxide hydrate and the carbon nanotubes, so that the electron mobility during desulfurization reaction is promoted. The desulfurizing agent is mild in preparation condition, low in production cost and very suitable for industrial large-scale production. In addition, the desulfurizing agent has good low-temperature desulfurization performance, so that the desulfurizing agent can be used for removing trace hydrogen sulfide in high-concentration CO2 gas, and has the characteristic of wide universality.

Description

technical field [0001] The invention belongs to the technical field of hydrogen sulfide removal, and in particular relates to an iron-based composite desulfurizer, a preparation method thereof and application of hydrogen sulfide in gas removal. Background technique [0002] Hydrogen sulfide (H 2 S) is a corrosive, toxic gas with a foul odor that exists in air, water, natural gas, crude oil, industrial production, and urban and agricultural sewage. Hydrogen sulfide is very harmful to human health. When there is a few ppm of sulfide gas in the air, it can be distinguished by human sense of smell. Exposure to 20-50ppm hydrogen sulfide for one hour can cause damage to human eyes and respiratory system. Long-term exposure to 250ppm hydrogen sulfide can cause pulmonary edema and possibly death. A single inhalation of hydrogen sulfide with a concentration of 1000ppm can be fatal. In addition, the H contained in the feed gas 2 S also causes many industrial problems (such as cat...

Claims

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Application Information

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IPC IPC(8): B01J23/745B01D53/52B01D53/86
CPCB01J23/745B01D53/8612
Inventor 张永春吉轲陈绍云
Owner 中峰信和(大连)科技有限公司
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