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Preparation method of sulfur dioxide adsorbent used for flue gas treatment

A technology of sulfur dioxide and fumed silica, which is applied in the direction of chemical instruments and methods, gas treatment, separation methods, etc., can solve the problems such as the ability to adsorb sulfur dioxide that have not been mentioned, and achieve the reduction of conditional guarantee consumption, high selective adsorption, and adsorption The effect of large capacity

Inactive Publication Date: 2019-08-09
SINOSTEEL MAANSHAN INST OF MINING RES +2
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The adsorbent does not mention its ability to adsorb sulfur dioxide at high temperatures, but the temperature of coal-fired flue gas emitted from industrial production is relatively high, and it is urgent to develop an adsorbent suitable for adsorbing sulfur dioxide in flue gas at high temperatures. Material

Method used

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  • Preparation method of sulfur dioxide adsorbent used for flue gas treatment
  • Preparation method of sulfur dioxide adsorbent used for flue gas treatment

Examples

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specific Embodiment

[0031] Specific examples: in a beaker, mix 2.4g29% of ammonium hydroxide (NH 4 OH) solution and 21.2g25% cetrimonium chloride solution (CH 3 (CH 2 ) 15 N(Cl)(CH 3 ) 3 ), 3.0g tetramethylammonium hydroxide pentahydrate ((CH 3 ) 4 N(OH)·5H 2 O), 18.9g10% tetramethylammonium silicate ((CH 3 ) 4 N(OH)·2SiO 2 ) solution, and 4.5g fumed silica (SiO 2 ) to form a reaction gel, use a magnetic stirrer to stir the gel for 30 minutes, then put it into a hydrothermal reaction kettle, keep it in a reaction oven at 80°C for 24 hours, and take it out after 24 hours of natural cooling. After taking it out, open the hot water reaction kettle, and adjust the pH value to 8.0 by concentrated sulfuric acid. Then carry out the hydrothermal reaction process at 80° C. for 24 hours. The process of adjusting the pH and continuing the hydrothermal reaction is a total of 3 times. The conditions of each hydrothermal reaction are 80°C and 24 hours. Air dry for 48 hours. The powder calcination...

Embodiment example 1

[0035] Adsorption method of sulfur dioxide in flue gas by adsorbent: Carry out in fluidized bed, make flue gas fully contact with adsorbent, flue gas flow rate 2.0L / min, sulfur dioxide concentration in flue gas 500ppm, adsorption temperature can be 350°C. The contact pressure is 0.15MPa, the adsorption cycle is 24 hours, the sulfur dioxide removal rate is 88.7%, and the sulfur adsorption capacity is 5.5%.

Embodiment example 2

[0037] The method of adsorption of sulfur dioxide in the flue gas by the adsorbent: carry out in a fixed bed, make the flue gas fully contact with the adsorbent, the flue gas flow rate is 5.0L / min, the sulfur dioxide concentration in the flue gas is 350ppm, and the adsorption temperature can be 400°C. The contact pressure is 0.18MPa, the adsorption cycle is 12 hours, the sulfur dioxide removal rate is 91.7%, and the sulfur adsorption capacity is 5.2%.

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Abstract

The invention discloses a preparation method of a sulfur dioxide adsorbent used for flue gas treatment. The technology comprises the steps that 4.6-5.6 parts of an ammonium hydroxide solution, 36.8-44.4 parts of a cetrimonium chloride solution, 3.0-6.9 parts of tetramethylammonium hydroxide pentahydrate, 35.5-41.0 parts of a tetramethyl ammonium silicate solution and 4.0-9.8 parts of fumed silicaare adopted for generating reaction gel; then the reaction gel is placed in a hydrothermal reaction kettle, concentrated sulfuric acid is added, the pH is adjusted, a hydrothermal reaction is continued 1-4 times, and after an air-dried product is subjected to powder calcining, the sulfur dioxide adsorbent is prepared. The sulfur dioxide adsorbent has the advantages that the sulfur dioxide removalrate is high, the sulphur adsorption capacity is large, and the adsorbent is suitable for being used at the high temperature of 250-800 DEG C and is particularly suitable for treatment of coal-firedflue gas in the high-temperature environments of metallurgy, electricity and the like.

Description

technical field [0001] The invention belongs to the technical field of sulfur dioxide adsorbent preparation, and in particular relates to a preparation method of an adsorption material for adsorbing sulfur dioxide in flue gas, which is especially suitable for the treatment of coal-fired flue gas in high-temperature environments such as metallurgy and electric power. Background technique [0002] As we all know, SOx emitted into the atmosphere due to the combustion of fossil fuels has caused serious pollution to the atmospheric environment and poses a serious threat to the survival of humans, animals and plants. According to the 2015 National Environmental Statistical Bulletin, SO 2 The emission was as high as 18.591 million tons, which had a great impact on people's production and life. How to economically and effectively control SOx emissions has become an important issue faced by the majority of desulfurizers. In order to reduce or eliminate further harm caused by sulfur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/16B01J20/30B01D53/02
CPCB01D53/02B01D2257/302B01J20/16
Inventor 李刚吴晓燕华绍广康虔吴将有
Owner SINOSTEEL MAANSHAN INST OF MINING RES
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