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A kind of efficient sulfur dioxide desulfurization agent, preparation method and desulfurization method

A technology of sulfur dioxide and desulfurizer, applied in the field of desulfurization, can solve the problems of adsorption liquid volatilization loss, large by-product output, low adsorption efficiency, etc., and achieve the effect of increasing binding force

Active Publication Date: 2022-05-06
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for part of the smelting tail gas, due to the high sulfur content of the smelting raw materials, the tail gas SO 2 content of 1~3%, or even 10%, this part of SO 2 The cost of harmless treatment is high, and the output of by-products is large and the value is low. Therefore, the development of new SO 2 Capture-subsequent utilization technology is considered to be a green and sustainable desulfurization research direction, such as the use of ionic liquids and organic amines for adsorption and desorption, and the high concentration of SO obtained by desorption 2 Further production of sulfuric acid to realize the recycling of sulfur resources, the above methods currently have selectivity, loss of adsorption liquid volatilization, trace (micro) amount of SO 2 Problems such as low adsorption efficiency

Method used

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  • A kind of efficient sulfur dioxide desulfurization agent, preparation method and desulfurization method
  • A kind of efficient sulfur dioxide desulfurization agent, preparation method and desulfurization method
  • A kind of efficient sulfur dioxide desulfurization agent, preparation method and desulfurization method

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Embodiment 1

[0031] Prepare two 100 mL 1.0mol / L citric acid solutions, dissolve 9.3 g of aniline in one of the citric acid solutions, then add 1 g of common commercial activated carbon to the aniline-citric acid solution, and stir for 30 min in an ice-water bath , put it aside for 1 hour, and set aside; dissolve 22.8 g of ammonium persulfate in another citric acid solution, drop it into the above-mentioned carboaniline-citric acid solution, control the dropping within 1 hour, react in an ice-water bath for 2 hours, and then reduce the pressure Suction filtration, the filter cake was vacuum-dried at 60°C, and finally heated to 350°C in a nitrogen atmosphere at a controlled temperature increase rate of 5°C / min, and kept at this temperature for 2 hours to obtain a carbon material marked C ca-350 .

Embodiment 2

[0033] Prepare two 200 mL 0.75mol / L tartaric acid solutions, dissolve 11.2g of aniline in one of the tartaric acid solutions, then add 1g of common commercial activated carbon into the aniline-tartaric acid solution, stir for 30 min in an ice-water bath, and let stand 0.5h, set aside; dissolve 22.8 g of ammonium persulfate in another part of tartaric acid solution, drop it into the above-mentioned carboaniline-tartaric acid solution, control the dripping within 1 hour, react in an ice-water bath for 1 hour, and then suction filter under reduced pressure. The filter cake was vacuum-dried at 60°C, and finally heated to 350°C in a nitrogen atmosphere at a controlled temperature increase rate of 5°C / min, and kept at this temperature for 1 hour to obtain a carbon material marked C ta-350 .

Embodiment 3

[0035] Prepare two 1000 mL 0.5mol / L sulfuric acid solutions, dissolve 18.6 g of aniline in one of the sulfuric acid solutions, then add 20 g of common commercial activated carbon into the aniline-sulfuric acid solution, and stir for 30 min in an ice-water bath for later use; Dissolve g ammonium persulfate in another part of sulfuric acid solution, drop it into the above-mentioned carboaniline-sulfuric acid solution, control the dripping within 1 hour, react in ice-water bath for 2 hours, then filter under reduced pressure, vacuum the filter cake at 60°C Dry, and finally heat up to 350°C in a nitrogen atmosphere at a controlled temperature increase rate of 5°C / min, and keep the temperature for 0.5h to obtain a carbon material marked C sa-350 .

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Abstract

The invention discloses a high-efficiency sulfur dioxide desulfurizer, a preparation method and a desulfurization method. The method comprises the following steps: S1: respectively dissolving aniline and ammonium persulfate in two equal-volume organic acid solutions to obtain aniline organic acid solution and ammonium persulfate organic acid solution; S2: adding activated carbon to the aniline organic acid solution to obtain an organic acid carbon water mixture; S3: adding the ammonium persulfate organic acid solution dropwise to the aniline organic acid In the carbon-water mixture, after the reaction, a coating material is obtained; S4: performing heat treatment on the coating material to obtain a polyaniline-based carbon material. The carbon material-coated amine-based carbon layer of the present invention can be used alone for absorbing and desorbing sulfur dioxide; it can also be used in combination with organic amines to efficiently absorb and desorb sulfur dioxide through solid phase amine groups and liquid phase amine groups and synergistic effects. Especially for trace sulfur dioxide in tail gas.

Description

technical field [0001] The invention relates to the technical field of desulfurization, in particular to a high-efficiency sulfur dioxide desulfurizer, a preparation method and a desulfurization method. Background technique [0002] With the rapid development of social economy, the human demand for energy has also increased sharply, and the massive combustion of fossil fuels has resulted in SO in the atmosphere. 2 , CO 2 The content of such acid gases is increasing year by year. Such acid gases cause harm to the environment, animals, and humans through transformation and deposition. especially SO 2 , first of all, it has direct or indirect contact with animals and people through sedimentation, causing serious damage to their health, such as sense of smell, taste and respiratory system, etc.; secondly, it forms acid rain / optical smog through transformation, which is harmful to aquatic, agricultural, forest and other ecological System damage, corrosion to buildings etc. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/02B01J20/30B01J20/20
CPCB01D53/02B01J20/20B01D2258/0283B01D2253/102B01D2257/302
Inventor 高云芳徐新
Owner ZHEJIANG UNIV OF TECH