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Polyethyleneimine modified sepiolite adsorbent as well as preparation method and application thereof

A technology of polyethyleneimine and sepiolite, which is applied in the direction of separation methods, chemical instruments and methods, and other chemical processes, to achieve the effects of simple and easy process, high adsorption efficiency, and convenient use

Active Publication Date: 2017-07-14
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the immobilization of sepiolite and some amines and its use in the field of carbon dioxide adsorption.

Method used

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Examples

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Embodiment 1

[0024] The present embodiment provides a kind of preparation method of polyethyleneimine modified sepiolite adsorbent, comprising the following steps:

[0025] (1) Sepiolite acid treatment: Weigh 3 g of purified sepiolite powder and add it to 120 mL of sulfuric acid solution with a concentration of 1 mol / L, stir continuously at room temperature for 12 hours, separate by suction filtration, and wash until neutral. Dry in an oven at 100°C for 24 hours, and then grind to obtain acid-treated sepiolite.

[0026] (2) Sepiolite amine immobilization: Dissolve 0.4g of polyethyleneimine in 40mL of anhydrous methanol, stir at room temperature for 40min, take 1g of acid-treated sepiolite in step (1), add it, and continuously stir at room temperature After 15 hours, place in an oven at a constant temperature of 45°C and dry for 24 hours to remove methanol. After grinding, the amine-immobilized sepiolite adsorbent is obtained, that is, the polyethyleneimine modified sepiolite adsorbent is ...

Embodiment 2

[0028] The present embodiment provides a kind of preparation method of polyethyleneimine modified sepiolite adsorbent, comprising the following steps:

[0029] (1) Sepiolite acid treatment: Weigh 4 g of purified sepiolite powder and add it to 120 mL of sulfuric acid solution with a concentration of 2 mol / L, stir continuously at room temperature for 12 hours, then separate by suction filtration, and wash until neutral. Dry in an oven at 100°C for 24 hours, and then grind to obtain acid-treated sepiolite.

[0030] (2) Sepiolite amine immobilization: Dissolve 0.7g of polyethyleneimine in 50mL of anhydrous methanol, stir at room temperature for 50min, take 1g of acid-treated sepiolite in step (1), add it, and continue stirring at room temperature After 20 hours, place in an oven at a constant temperature of 45°C and dry for 24 hours to remove methanol. After grinding, the amine-immobilized sepiolite adsorbent is obtained, that is, the polyethyleneimine modified sepiolite adsorben...

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Abstract

The invention discloses a polyethyleneimine modified sepiolite adsorbent as well as a preparation method and an application thereof. The polyethyleneimine modified sepiolite adsorbent comprises the following steps: (1) adding sepiolite powder into an acid solution, stirring to separate out the sepiolite powder, washing until the sepiolite powder is neutral, drying, and grinding, so as to obtain acid-activated sepiolite powder; and (2) dissolving polyethyleneimine into an alcohol solvent, adding the acid-activated sepiolite powder obtained in the step (1), stirring, drying, and grinding, so as to obtain the polyethyleneimine modified sepiolite adsorbent. The preparation method has the beneficial effects that the modified sepiolite adsorbent can be obtained by two simple steps of acid activation and amine modification, the preparation process is simple, the operation is easy, preparation conditions are mild, equipment requirements are low, the energy consumption is low, and the production cost is low. The modified sepiolite adsorbent prepared by virtue of the preparation method is low in cost and excellent in performance and has an adsorption effect on carbon dioxide.

Description

technical field [0001] The invention relates to a polyethyleneimine modified sepiolite adsorbent, a preparation method and application thereof, and relates to the field of carbon dioxide adsorbents. Background technique [0002] With the development of society, the excessive emission of carbon dioxide has had a great impact on the global climate and ecological environment, especially the carbon dioxide emission caused by the combustion of fossil fuels has attracted widespread attention. Statistics show that among fossil energy sources, coal accounts for about 40% of global energy, and coal-fired electricity contributes more than 20% of global carbon dioxide emissions, while more than 70% of China's electricity is produced by coal-fired power plants, so coal-fired Capturing carbon dioxide produced by power plants to prevent it from being released into the atmosphere is considered a feasible way to reduce carbon dioxide emissions on a large scale and slow global warming. It i...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01D53/02B01J20/30
CPCB01D53/02B01D2257/504B01J20/12B01J20/261Y02C20/40
Inventor 罗潇袁梦胡夏一梁志武
Owner HUNAN UNIV
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