Compound type intermediate-temperature carbon dioxide adsorbent and preparation method thereof

A technology of carbon dioxide and adsorbent, which is applied in the field of new composite medium-temperature carbon dioxide adsorbent and its preparation, can solve the problems of low adsorption efficiency of warm carbon dioxide adsorbent, achieve good cycle regeneration performance, simple and easy process, and improve adsorption performance Effect

Inactive Publication Date: 2016-07-27
NORTHEASTERN UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing a composite medium-temperature carbon dioxide adsorbent with high adsorption efficiency at a temperature of 150-300°C, so as to solve the problem of low adsorption efficiency of the existing medium-temperature carbon dioxide adsorbent

Method used

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  • Compound type intermediate-temperature carbon dioxide adsorbent and preparation method thereof

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Effect test

Embodiment 1

[0022] First mix 1.0g of MCM-41 and 2.5g of Na 2 CO 3 Place in 10mL of deionized water, stir and mix evenly, configure mixed slurry A, and then add 6.0g of Mg(NO 3 ) 2 ·6H 2 O and 4.4g of Al(NO 3 ) 3 9H 2 O was added to 15mL deionized water to configure mixed solution B, and 3.5g NaOH was added to 10mL deionized water to configure alkaline solution C. B and C solutions were simultaneously added dropwise to the slurry A, and the pH was kept between 10-12, and vigorously stirred during the dropwise addition. Aged at 60°C for 12 hours, then repeatedly washed until the pH of the solution was 7, and the solid powder obtained after filtration was dried in a high-temperature drying oven at 120°C for 24 hours, and then taken out to obtain the required adsorbent.

Embodiment 2

[0024] First mix 1.0g of MCM-41 and 4.0g of Na 2 CO 3 Place in 16mL of deionized water, stir and mix evenly, configure mixed slurry A, and then add 9.7g of Mg(NO 3 ) 2 ·6H 2 O and 7.1g of Al(NO 3 ) 3 9H 2 O was added to 24mL deionized water to make mixed solution B, and 5.5g NaOH was added to 16mL deionized water to make alkaline solution C. B and C solutions were simultaneously added dropwise to the slurry A, and the pH was kept between 10-12, and vigorously stirred during the dropwise addition. Aging at room temperature 25°C for 18 hours, and then repeated washing until the pH value of the solution was 7, the solid powder obtained after filtration was dried in a high-temperature drying oven at 95°C for 30 hours, and then taken out to obtain the required adsorbent.

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Abstract

The invention belongs to the technical field of environmental protection and discloses a novel compound type intermediate-temperature carbon dioxide adsorbent and a preparation method thereof. The compound type intermediate-temperature carbon dioxide adsorbent is used for adsorbing and separating CO2 in industrial smoke. The carbon dioxide adsorbent prepared with the method is characterized in that the absorbent is a magnesia-alumina type hydrotalcite composite prepared with a coprecipitation method on ordered mesoporous silica MCM-41 serving as a support material, and the problem of low adsorption efficiency of existing intermediate-temperature carbon dioxide adsorbents is solved. The method adopts a simple process and is simple to operate. The adsorbent prepared with the method has higher selective adsorption capability for carbon dioxide in gas containing certain moisture at the temperature of 150-300 DGE C, and smoke is not required to be cooled in advance. Besides, the adsorbent has the characteristics of low preparation cost, good recycling performance and no secondary pollution in the adsorption separation process.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a novel composite medium-temperature carbon dioxide adsorbent and a preparation method thereof, which are used for adsorbing and separating CO in industrial flue gas. 2 . Background technique [0002] With the development of industrialization, the emission of greenhouse gases has increased year by year, and a series of severe environmental problems such as global warming have become increasingly prominent. Atmospheric CO 2 Concentration increases sharply year by year, is the most important greenhouse gas. At present, in industrial production, energy consumption is dominated by coal, and coal-fired boilers will produce a large amount of CO 2 flue gas, reducing CO in the flue gas of coal-fired boilers 2 It is essential to slow down greenhouse gas emissions and mitigate global warming. Either the CO 2 Whether it is buried permanently or reused, it is necessary f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/10B01J20/30B01D53/02
CPCB01D53/02B01D2253/10B01D2257/504B01D2258/0283B01J20/0296B01J20/043B01J20/103B01J2220/4806Y02C20/40
Inventor 杜涛刘丽影王义松房鑫宋延丽未艺超张斌王玉顺
Owner NORTHEASTERN UNIV
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