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Magnetic solid adsorbent for removing CO2 from flue gas

A solid adsorbent and magnetic technology, applied in gas treatment, alkali metal oxide/hydroxide, inorganic chemistry, etc., can solve the problems of complex adsorbent recovery, large adsorbent loss, large equipment investment, etc., and achieve regeneration energy Low consumption, fast absorption speed, and large absorption capacity

Inactive Publication Date: 2019-03-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after this kind of solid adsorbent is molded, there will be CO in the actual industrial application. 2 Low adsorption capacity, large investment in equipment, complicated recovery of adsorbent, large loss of adsorbent, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 10.8gFeCl 3 ·6H 2 O, polyvinylpyrrolidone / FeCl 3 ·6H 2 O molar ratio=3 / 40, 10g of sodium acetate was dissolved in ethylene glycol, and reacted at 200°C for 6h to obtain Fe 3 o 4 Magnetic microspheres; Fe 3 o 4 Magnetic microspheres were dispersed in aluminum isopropoxide / ethanol solution, stirred and hydrolyzed for 1 h to obtain Al 2 o 3 / Fe 3 o 4 Magnetic microspheres; Tetraethylenepentamine loaded onto Al by impregnation method 2 o 3 / Fe 3 o 4 On the surface of the magnetic microspheres, tetraethylenepentamine accounts for 10% of the mass fraction of the magnetic solid. The solid adsorbent thus prepared is labeled as FeAl-1.

[0015] The simulated flue gas is atmospheric pressure, CO 2 The content is 12%, the rest is N 2 . The adsorption temperature is 30°C, and the flue gas is passed into the absorption tower equipped with magnetic solid adsorbent FeAl-1 aqueous solution, and after the absorption is complete, it enters the regeneration tower and is r...

Embodiment 2

[0017] 10.8gFeCl 3 ·6H 2 O, polyvinylpyrrolidone / FeCl 3 ·6H 2 O molar ratio=3 / 40, 20g of sodium acetate was dissolved in ethylene glycol, and reacted at 200°C for 10h to obtain Fe 3 o 4 Magnetic microspheres; Fe 3 o 4 Magnetic microspheres were dispersed in aluminum isopropoxide / ethanol solution, stirred and hydrolyzed for 2 hours to obtain Al 2 o 3 / Fe 3 o 4 Magnetic microspheres; Tetraethylenepentamine loaded onto Al by impregnation method 2 o 3 / Fe 3 o 4 On the surface of the magnetic microspheres, tetraethylenepentamine accounts for 40% of the mass fraction of the magnetic solid. The solid adsorbent thus prepared is labeled FeAl-2.

[0018] The simulated flue gas is atmospheric pressure, CO 2 The content is 12%, the rest is N 2 . The adsorption temperature is 45°C, and the flue gas is passed into the absorption tower equipped with magnetic solid adsorbent FeAl-2 aqueous solution, and after the absorption is complete, it enters the regeneration tower and is...

Embodiment 3

[0020] 10.8gFeCl 3 ·6H 2 O, polyvinylpyrrolidone / FeCl 3 ·6H 2 O molar ratio=3 / 40, 30g of sodium acetate was dissolved in ethylene glycol, and reacted at 200°C for 12h to obtain Fe 3 o 4 Magnetic microspheres; Fe 3 o 4 Magnetic microspheres were dispersed in aluminum isopropoxide / ethanol solution, stirred and hydrolyzed for 3 hours to obtain Al 2 o 3 / Fe 3 o 4 Magnetic microspheres; Tetraethylenepentamine loaded onto Al by impregnation method 2 o 3 / Fe 3 o 4 On the surface of the magnetic microspheres, tetraethylenepentamine accounts for 60% of the mass fraction of the magnetic solid. The solid adsorbent thus prepared is labeled as FeAl-3.

[0021] The simulated flue gas is atmospheric pressure, CO 2 The content is 12%, the rest is N 2 . The adsorption temperature is 60°C, and the flue gas is passed into the absorption tower equipped with magnetic solid adsorbent FeAl-3 aqueous solution. After the absorption is complete, it enters the regeneration tower and is ...

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Abstract

The invention belongs to the technical field of flue gas CO2 removal, and relates to a magnetic solid adsorbent for removing CO2 from flue gas. The magnetic solid adsorbent adopts a nano-scale magnetic solid as a carrier, and an organic amine as a loaded substance. The nano-scale magnetic solid carrier is SiO2 / Fe3O4, and Al2O3 / Fe3O4 magnetic microspheres having a core / shell structure and having asize of about 200 nm to 300 nm, wherein the Fe3O4 is magnetic and is covered with SiO2 and Al2O3 which have large specific surface area, and the organic amine is loaded onto the SiO2 and Al2O3 througha soaking manner to form the magnetic solid adsorbent. The magnetic solid adsorbent can be uniformly dispersed in an aqueous solution, can be used on a common solvent decarburization device, and hasthe characteristics of high adsorption speed, large adsorption capacity, low regeneration energy consumption, easy adsorbent recovery, and low loss.

Description

technical field [0001] The invention belongs to the technical field of gas purification and environmental protection, and relates to a method for removing CO from flue gas 2 magnetic solid adsorbent. Background technique [0002] The capture and separation of carbon dioxide in flue gas is currently a research hotspot that is widely concerned around the world, and various new technologies are constantly being proposed and developed. At present, the capture and separation technologies of carbon dioxide in flue gas include liquid solvent absorption method, adsorption method, biological method, membrane separation method and cryogenic freezing method, etc. Among them, the liquid solvent absorption-regeneration process is relatively mature and has been applied in industry. Commonly used absorbents include liquid amine absorbents such as ethanolamine, diethanolamine, and N-methyldiethanolamine solution. Liquid amine absorbent has the advantages of fast absorption speed, strong ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/32B01D53/02
CPCB01D53/02B01J20/223B01J20/28009B01J20/3204B01D2257/504Y02C20/40
Inventor 毛松柏郑园园江洋洋汪东
Owner CHINA PETROLEUM & CHEM CORP